Description
GSE Model 250Digital Indicator Series Technical Reference Manual Issue AC GSE Model 250/250X Technical Manual Copyright © 2008 GSE. All rights reserved. Published by: GSE 1525 Fairlane Circle Allen Park, MI 48101 USA Information in this Technical Reference Manual is subject to change without notice due to correction or enhancement. The information described in this manual is solely the property of GSE. This manual may not be distributed without written permission of GSE. GSE Locations GSE 1525 Fairlane Circle Allen Park, MI 48101 U.S.A. www.gse-inc.com GSE Amprobe Europe GmbH Phone: +49 (0) 2161-59906-11 Fax: +49 (0) 2161-59906-20 . Table of Contents Chapter 1: Introduction _________________________________________________ 9 Manual Set _______________________________________________________________________ 10 Document Conventions _____________________________________________________________ 10 Specifications _____________________________________________________________________ 11 Chapter 2: Installation _________________________________________________ 13 General Warnings__________________________________________________________________ 13 Electrical Safety ___________________________________________________________________ 13 Cleaning _________________________________________________________________________ 13 Panel Mount Template ______________________________________________________________ 13 Cable Connections _________________________________________________________________ 14 DC Power (DC PWR + DC PWR -) _____________________________________________________ 14 Load Cell Connection ______________________________________________________________ 15 Load Cell Signals ________________________________________________________________ 15 4 – Wire Connection _____________________________________________________________ 15 6 – Wire Connection _____________________________________________________________ 15 RS-232 Serial ___________________________________________________________________ 16 Printer Connection _______________________________________________________________ 17 Remote Key ____________________________________________________________________ 17 Remote Display _________________________________________________________________ 17 Model 250 _____________________________________________________________________ 18 Model 250X ____________________________________________________________________ 18 Communication Port Connection _____________________________________________________ 16 Setpoint Output Connection _________________________________________________________ 18 GSE-Link Option Connection (Opto-Link) ______________________________________________ 19 Connecting Shields ________________________________________________________________ 20 Chapter 3: Configuration _______________________________________________ 21 Basic Operation ___________________________________________________________________ 21 Display ________________________________________________________________________ 21 Status annunciators ______________________________________________________________ 22 Setup Mode Annunciators _________________________________________________________ 22 Selections and Options ____________________________________________________________ 23 Numeric Entry __________________________________________________________________ 23 Keypad ________________________________________________________________________ 23 Update Model 250 Firmware _________________________________________________________ 26 Chapter 4: Setup ______________________________________________________ 27 Accessing the Setup Mode __________________________________________________________ 27 Full Setup ______________________________________________________________________ 27 Safe Setup _____________________________________________________________________ 27 Setup Display Prompts ____________________________________________________________ 28 Setup Lock Out _________________________________________________________________ 28 Exit the Setup Mode ________________________________________________________________ 28 Version 2.4 Page 5 . LIN (Edit Linearization Points) __________________________________________________ 43 CLR.LIN (Clear Linearization) _____________________________________________________ 44 Calibration with mV/V Entry _________________________________________________________ 42 Using Linearization ________________________________________________________________ 43 Reset Calibration __________________________________________________________________ 44 Chapter 6: Approvals __________________________________________________ 45 Regular and Legal for Trade Modes ___________________________________________________ 45 NTEP Requirements ________________________________________________________________ 45 OIML Requirements ________________________________________________________________ 46 Audit Trail ________________________________________________________________________ 46 Physical Seal _____________________________________________________________________ 46 Chapter 7: Setpoints ___________________________________________________ 49 Setpoint Connection _______________________________________________________________ 49 Setpoint Operation (250 and 250SS) __________________________________________________ 49 Checkweigh Operation (250X)________________________________________________________ 49 Chapter 8: Communications_____________________________________________ 50 Automatic Weight Output ___________________________________________________________ 51 Auto Weight Format String ________________________________________________________ 51 Printing __________________________________________________________________________ 52 Page 6 250 Technical Reference .ZER (Direct Zero Calibration Entry) _____________________________________________ 42 DIR.Groups and Items __________________________________________________________________ 29 GRP (Group) ___________________________________________________________________ 29 ITM (Item) _____________________________________________________________________ 29 Build _________________________________________________________________________ 29 Option ________________________________________________________________________ 30 Cal ___________________________________________________________________________ 31 Spec __________________________________________________________________________ 32 Serial _________________________________________________________________________ 34 Set.SPN (Direct Span Calibration Entry) _____________________________________________ 43 ED.Pts or CheckW _______________________________________________________________ 35 Clock _________________________________________________________________________ 36 Test __________________________________________________________________________ 36 Factory ________________________________________________________________________ 37 End ___________________________________________________________________________ 37 None __________________________________________________________________________ 37 Test __________________________________________________________________________ 37 Count _________________________________________________________________________ 37 Units __________________________________________________________________________ 38 Hold __________________________________________________________________________ 38 Peak Hold______________________________________________________________________ 38 Live Weight Averaging ___________________________________________________________ 38 Show Total (Accumulation) ________________________________________________________ 39 Setup Parameters __________________________________________________________________ 29 Special Functions__________________________________________________________________ 37 Chapter 5: Calibration _________________________________________________ 41 Calibration with Test Weights ________________________________________________________ 41 Zero __________________________________________________________________________ 42 Span __________________________________________________________________________ 42 DIR. 4 Page 7 .Master Serial Output _______________________________________________________________ 53 Advanced Communication __________________________________________________________ 53 Using GSE View Software ________________________________________________________ 53 Protocol Summary _______________________________________________________________ 54 Example: Reading a Weight or Setpoint Value ________________________________________ 55 Example: Remote Keypress _______________________________________________________ 57 Example: Reading a Value in Hexadecimal ___________________________________________ 58 Example: Setting a Value _________________________________________________________ 61 Error Codes (Registers) ___________________________________________________________ 62 Error Messages _________________________________________________________________ 63 Weighing Errors _________________________________________________________________ 63 Setup and Calibration Errors _______________________________________________________ 63 Diagnostic Errors ________________________________________________________________ 64 Chapter 9: Troubleshooting _____________________________________________ 63 Appendix _____________________________________________________________ 65 Dimensional Drawings ______________________________________________________________ 65 Setup Menu Quick Reference ________________________________________________________ 69 Index _________________________________________________________________________ 71 Version 2. This page is intentionally left blank Page 8 250 Technical Reference . It may be operated from either 4 AA batteries or a DC power source from 12V to 24V. The parameter map is the same as the Model 250. All versions of the 250 provide a method of easily connecting an RS-232 cable for temporary communication for software upgrades or link to the GSE View software. Figure 2: Model 250SS Indicator Version 2. Figure 1: Model 250 Indicator Model 250SS Panel Mount The Model 250SS Panel Mount has a stainless steel face with a membrane keypad overlay. Refer to page 53 for more information. The setup and calibration of the Model 250 are stored digitally within non-volatile memory. Standard Model 250 The ABS plastic version of the Model 250 is available in wall/desktop and can be panel mounted. The panel mount version may be operated from either 4 AA batteries or a DC power source from 12V to 24V.Chapter 1: Introduction The Model 250 series of indicators use the latest Sigma-Delta A/D technology to ensure fast and accurate weight readings.4 Page 9 . • Operator Manual – Used for day to day operation of the indicator. This symbol denotes one space (used in Automatic Weight Output on page 51) Items marked with ⊗ indicate that the setting is available only in Full Setup and is trade critical.Intended for Scale Technicians who are familiar with the indicator and simply need a quick reference for menu options and connection diagrams.Contains detailed information on calibration and setup. • Quick Start Manual . These keypresses are designated by the display annunciators Note: In the Specifications section the < symbol means less than and the > symbol means greater than. 12V or 24V batteries or a DC power source from 12V to 24V. Figure 3: Model 250X Indicator MANUAL SET • Technical Reference Manual . etc. This version of the Model 250 is only available in wall/desktop.6V. DOCUMENT CONVENTIONS The following document conventions (typographical) are used throughout this reference manual. ^ ⊗ Page 10 250 Technical Reference . The Model 250X may be operated from 9. Bold Text [KEY] <Key> Bold text denotes words and phrases to note. When trade critical settings are changed the calibration counter will be incremented. This manual is intended for use by Scale Technicians who are installing the indicator. A keypress while in the WEIGH MODE A keypress while in the SETUP MODE.Model 250X The Model 250X enclosure is rated as IP69K for severe washdown applications. 8. Nylon. 20 updates/second +/.1 to 4.8” (44.8” (249.0 lb 10 point linearity correction CE. NTEP 4. panel. Enclosure Material Mounting Dimensions (Refer to page 65) Stainless Steel face plate panel 7. live weight and accumulation Battery life 10 years minimum Five point linearity correction FCC. CE. Transmission rate: 2400. Acrylic (no halogen used) Desk.8” (97 mm) x 3.2. column 9.5mA 12 to 24 VDC (2. counting.5 VA max) 4 x AA batteries (Alkaline or rechargeable NiMH.4” (112 mm) x 1.5 VA max) 4 x AA batteries (Alkaline or rechargeable NiMH. 4800. minimum of 0.mm) x 6.SPECIFICATIONS 250 Resolution Zero Cancellation Span Adjustment Stability / Drift Excitation A/D Type A/D Conversion Rate Operation Environment Setup and Calibration Digital Filter Zero Range AC DC 250SS Panel Mount Performance 250X Up to 30.2” (81mm) Panel: 6.5” (164mm) x 3. peak hold. CE. Silicon Rubber.1μ V/°C (+ 8ppm of deadload max) 5 volts for up to 4 x 350 or 8 x 700 ohm load cells (4 or 6 wire plus shield).608 internal counts 20Hz with FIR filtering > 80db Temperature: 14 to 122°F Temperature: 14 to 122°F Temperature: 14 to 122°F ambient ambient ambient Humidity: <92% nonHumidity: <90% nonHumidity: 100% condensing condensing Storage: -4 to 122°F ambient Storage: -4 to 122°F ambient Storage: -4 to 122°F ambient IP69K IP55 when panel mounted IP65 Full digital with visual prompting 0. NiCad) ABS. NTEP FCC. manual hold.0 mV/V 0.4 lb Version 2.0 seconds Adjustable from 2% to 20% of full capacity Electrical Wall transformer: 110/240 VAC to 12 VDC @ 0. NiCad) 100 – 240 VAC 50/60 MHz 12 VDC rechargeable NiMH (optional) battery pack.000 divisions.5 mm) Wall transformer: 110/240 VAC to 12 VDC @ 0.8” digits with 8 annunciators including units 6 key silicon rubber 6 key membrane 6-key capacitive Infra-red connector for optional GSE-Link PC cable (to RS-232 PC port) RS-232 automatic transmit. Maximum load cell resistance is 1000 ohms 24 bit Sigma Delta with +/.8” (199mm) x 4.0 lb 5.4 Page 11 .16” (29.25 V/division.388. network or printer outputs.1 mV/V to 3.5 mm) Food grade plastic with stainless steel mounting bracket Desk. wall.5mA 12 to 24 VDC (2.7” (119mm) Features Display Keypad GSE Link RS-232 Communication Setpoints Function Key Battery Backed Time/Date Linearization Approvals Shipping Weight LED backlit LCD with six 0.0 mV/V full scale Zero: < 0.4” (163 mm) x 4.0” (77 mm) x 1.5” (164mm) x 3. wall or column Desk: 6. or 9600 baud 2 isolated transistor drive 2 isolated transistor drive 3 isolated high side drive outputs outputs (300mA total at outputs (300mA total at (400mA each at 12 – 24 VDC) 50VDC) 50VDC) Unit switching. NTEP 1. This page is intentionally left blank Page 12 250 Technical Reference . • Connect power to indicator and press [ON/OFF] key to turn the Model 250 ON. ELECTRICAL SAFETY • For your protection all electrical hardware must be rated for environmental conditions of use. CLEANING To clean and maintain the Model 250. • The indicator should be installed away from any sources of excessive electrical noise. • Inspect indicator to ensure it is in good condition. • To turn the Model 250 OFF press and hold [ON/OFF] key for three seconds (until display blanks). always switch OFF or isolate the indicator from the power supply before maintenance is carried out.4 Page 13 . excessive vibration or extremes of temperature (before or after installation). Wipe the indicator with a soft cloth slightly dampened with warm soapy water. but excessive levels of electro-magnetic radiation and RFI may affect the accuracy and stability. termination of cable shields and correct grounding of the indicator is essential. For the stainless steel models. Also displayed on the template is the position of the rectangular hole that should be cut to allow for the connection of cables. • Inputs are protected against electrical interference. The drilling template supplied with the indicator allows for front or rear machining of the panel.Chapter 2: Installation The following steps are required to set up the indicator. • Use the template provided for hole locations. power and auxiliary cables as required. PANEL MOUNT TEMPLATE Use the panel mount template (included with the Model 250 and Model 250SS) for drill hole locations. Version 2. • For full EMC or for RFI immunity. • To avoid the possibility of electric shock or damage to the Model 250. • Make sure all AC powered equipment is installed near an easily accessible power socket outlet. • Refer to the Setup Parameter section on page 29 for information on configuring and calibrating the Model 250. GENERAL WARNINGS • Do not subject the Model 250 indicator to shock. • Use connection diagrams to wire up load cell. never use harsh abrasive cleaners or solvents. use a cleaner specifically for stainless steel. The template indicates positions for the two 4mm mounting screws through the panel. • The load cell cable is particularly sensitive to electrical noise and should be located well away from any power or switching circuits. Wires must be stripped of insulation by at least 3/8” (10mm). these techniques are also compatible with the terminals and may ultimately make for a neater job. remove the load cell connector and loosen the screws. Refer to the corresponding drawing below. provided that it is free of excessive electrical noise and sudden transients. depress the lever located beside the terminal required and push wire into the hole. Refer to the corresponding drawing below. The battery pack option uses an external charger. Gently pull on the wire to ensure it is secure in the connector. Page 14 250 Technical Reference . be sure to avoid splicing communication cables. Splicing cables may cause water wicking of the cable and jeopardize the integrity of stainless steel and IP69K enclosures. Make sure all cables are sealed on both ends to prevent water damage. The Model 250 series indicators can be operated from a high quality AC wall transformer as long as there is sufficient capacity to drive both it and the load cells. To install wires in the Model 250X. However. The Model 250X offers two DC power variations.CABLE CONNECTIONS All cable connections are made to the rear of the Model 250 using screwless terminals. It is not necessary to tin the ends of the wire with solder or to add crimp ferrules to the wires. Release the lever and pull gently on the wire to ensure it is secure in the terminal. The Model 250SS and 250X indicators will need to have the rear cover removed to access the connection terminals. Insert the wires in the designated position of the connector and tighten the screws. To install wires in the Model 250 and Model 250SS. A 12 VDC rechargeable NiCad battery for portable severe wash-down applications or supply your own DC power from a car/truck battery. The Model 250SS uses screwless terminals where the Model 250X uses screw in terminal connectors. 250/250SS Load Cell Connection 250X Load Cell Connection DC POWER (DC PWR + DC PWR -) The DC supply need not be regulated. load cell cables or home run cables. NOTE: For wash down and severe wash down environments. or the lower the number of divisions.lines. For more information. The BUILD:CABLE parameter must be set to 4 to allow for 4-wire connection. is only recommended for short cable runs.4 Page 15 . Refer to CABLE (4-Wire or 6-Wire) page 30. Where long additions to cable lengths are needed.lines directly to the Excitation + and . The extra two wires should be connected to the Sense + and Sense – terminals. refer to CABLE (4-Wire or 6-Wire) page 30. the greater the display stability and accuracy. 6-Wire Load Cell Connection (250/250SS) 6-Wire Load Cell Connection (250X) Version 2. Internally the indicator has a precision analog switch that can be used to connect the Sense + and . To correspond with the actual cabling installation the indicator must be configured in setup to the correct setting. The BUILD:CABLE parameter must be set to 6 (the default) to allow for 6-wire connection.LOAD CELL CONNECTION LOAD CELL SIGNALS Very low output scale bases may be used but may induce some instability in the weight readings when used with higher resolutions. The Model 250 will accept either 4-wire or 6-wire load cell cable connection. a 6 wire extension is required. the higher the output. Refer to CABLE (4-Wire or 6-Wire) page 30.e. 4 – WIRE CONNECTION The minimum connectivity requirements are the connection of four wires (i. 4-Wire Load Cell Connection (250/250SS) 4-Wire Load Cell Connection (250X) 6 – WIRE CONNECTION The excitation and signal lines are connected the same as for a 4-wire installation. Excitation + and along with Signal + and -). Any addition to the load cell manufacturer's cable length using 4-wire connection. The indicator can display the milliVolt-per-Volt reading that can be used to check scale base signal output levels. For more information. Generally speaking. refer to SCALE (Scale Base Test Display) page 36. Indicator to PC (250/250SS) DB25 RS-232 . TXD.Indicator to PC (250X) DB25 RS-232 .COMMUNICATION PORT CONNECTION This section provides diagrams to illustrate the terminal connections.Indicator to PC (250X) Page 16 250 Technical Reference . GND) DB9 RS-232 . RS-232 SERIAL Connection between the indicator and computer DB9 or DB25 serial port (RXD.Indicator to PC (250/250SS) DB9 RS-232 . FN parameter must be set. Connect TXD to RXD and GND to GND on the remote display.PRINTER CONNECTION Connection between the indicator and printer DB25 serial port (RXD/TXD. NOTE: The remote input will not function when in setup or when using the Opto-Link.Indicator to Printer (250/250SS) REMOTE KEY The indicator requires a voltage free contact between TXD and RXD to enable the remote key input and the SPEC:REM. REMOTE DISPLAY The remote display documentation should be referred to for connection details.4 Page 17 . GND and DTR)) DB25 RS-232 . Remote Display Connection Version 2. Refer to page 34 for configuration details.Indicator to Printer (250/250SS) DB25 RS-232 . Remote Key Input Connection (250/250SS) Remote Key Input Connection (250X) WARNING Do not connect voltage to the remote key input switch or connection terminals. Connection of any active circuitry may damage the indicator. It is recommended that flyback diodes or transient suppressors be fitted across inductive loads such as relay coils to limit switching noise. The voltage applied to the COM terminal appears on the output lines (i. connect the output line directly to the positive side of the relay coil. Output to Relay (250/250SS) Output to PLC (250/250SS) MODEL 250X The output drivers for the instrument are high side drive and are capable of driving up to 400mA each.e.SETPOINT OUTPUT CONNECTION MODEL 250 AND 250SS The output drivers for the Model 250 are isolated open emitter transistor drives that are capable of driving up to a total of 300mA. The voltage applied to the instrument’s positive power supply terminal (+) appears on the output lines (Over. The outputs can then be connected directly to PLC inputs. It is recommended that fly-back diodes or transient suppressors be fitted across relay coils to limit switching noise. relays). connect the relay coil positive supply to the output common and the output line directly to one side of the relay coil. OUT1 and OUT2) when the outputs are active (e.g. Connect the negative side of the relay coil to COMMON. Output to Relay (250X) Output to PLC (250X) Page 18 250 Technical Reference . The outputs can then be connected directly to PLC inputs so when activated the PLC will see the 22V signal (approx. relays). Pass and Under) when the outputs are active.g. . Connect the other end of the relay coil to the negative supply. To drive external loads (e. This configuration allows for the direct connection of the indicator outputs to most PLC types. To drive external loads (eg. This configuration allows for the direct connection of the instrument outputs to most types of PLC. to connect to a PLC connect +24V to the common terminal).the exact switch loss will depend on loading of the output). The indicator end of the cable consists of an infrared transceiver. Refer to GSE-LINK Activation on page 25 for more information. To facilitate a quick and simple connection.g. which attaches to the left side of the Model 250 display.GSE-LINK OPTION CONNECTION (OPTO-LINK) A temporary infrared communication link can be established between the Model 250 and a computer using the GSE-LINK cable option.4 Page 19 . WARNING The GSE-LINK head contains a strong magnet and care should be taken with it's proximity to electronic media (e. etc. Figure 4: GSE Link Option Attachment Version 2.) and/or other electronic instrumentation. floppy disks. the infrared transceiver is secured in place by a permanent magnet located within the head of the GSE-LINK. The GSE-LINK cable can be used to transfer setup and calibration information from a computer. It can also be used to download software upgrades to the Model 250 from a PC. The computer end of the GSE-LINK cable is a standard female DB9 connector. credit cards. CONNECTING SHIELDS To obtain full EMC or for RFI immunity. cable shields MUST be connected to the ground lug on the rear of the indicator. The ground lug of the indicator must be separately connected to ground potential via a reliable link. termination of the cable shields at the ground (earth) lug is very important. Figure 5: Cable Shield Connection Care should be taken when connecting shields to maximize EMC or RFI immunity and minimize ground loops and cross-talk (interference) between indicators. The Model 250 should only be connected to ground via a single reliable link to avoid ground loops. Where each indicator is separately grounded. For full EMC or for RFI immunity. Page 20 250 Technical Reference . interconnecting cable shields should be connected at one end only. Also shown are the connecting cables restrained using cable ties fastened around the cable strain relief anchors. Figure 5 illustrates an example of possible connections. none ( ) or ounces (o) (250X only). the units display will show pieces (p). Units Display The units display shows the units of the weight reading as either grams (g). Each display section is described below. kilograms (kg). Figure 6: Display and Functions DISPLAY The display is a six-digit LCD display.4 Page 21 . setup information. tons (t). Version 2. errors and warnings. Weight Display The weight display indicates the weight readings. pounds (lb).Chapter 3: Configuration BASIC OPERATION The Model 250 provides a bright backlit LCD display and simplified menu system for easy setup and use. If the Model 250 is set up for counting. Figure 6 shows the main elements of the front panel and display. The Model 250 has various main display sections for the visual output of weight information. EDT and OK). GRP.) Visible when the displayed reading is held. While in the Setup Mode. For more information refer to Setup Mode Annunciators discussed below. Yellow annunciator Visible when the setpoint weight is in between the high and low limits. Green annunciator Visible when the displayed weight is within the zero 'dead' band setting. (The low battery symbol shows in the top right corner of the display. SEL.STATUS ANNUNCIATORS Refer to the following table for details. ITM. press the corresponding key below the annunciator. Visible when the displayed reading represents NET weight.) or or OVER UNDER PASS ZERO BAND HOLD LOW BATTERY or When in Setup Mode the editing annunciators are shown to identify the function of the front panel keys (i. (The zero band symbol shows near the top right corner of the display. Red annunciator Visible when the setpoint weight is under the setpoint target.e. the Model 250 displays editing annunciators. Visible when battery voltage is too low and batteries need replacing or recharging. Table 1: Status Annunciators Symbol Name ZERO NET MOTION Description Visible when the gross reading is within ± ¼ of a division of true zero. Visible when the displayed reading is not stable. Figure 7 identifies each of the editing annunciators. Figure 7: Editing Annunciators (Setup Mode) Page 22 250 Technical Reference . SETUP MODE ANNUNCIATORS When in Setup Mode. Visible when the setpoint weight is over the setpoint target. Annunciator GRP ITM SEL EDT OK Key ZERO TARE GROSS/NET PRINT f (FUNCTION) Description Steps through the list of Groups. Steps through the list of Items. Press this key to accept changes and return to the menus. (Also refer to the OK description below.) Moves the editing cursor in some editing modes. Steps through the available options when editing a particular item. Press this key to accept changes and return to the menus. (Also refer to the ITM description above.) SELECTIONS AND OPTIONS A selection entry requires the choice of a single option from a list. When a Group and Item have been chosen, the <SEL> key is used to display the current setting for that item. The <EDT> key can be used to cycle through the options for that item. When the desired option is displayed the <OK> key can be pressed to accept the displayed option and re-display the item name. NUMERIC ENTRY A numeric entry box allows the input of a number. When entering a number, the display will show digits with the currently selected digit flashing. The <SEL> key is pressed to select a digit to change. When the digit is selected the <EDT> key is pressed to change the digit from 0 through 9. The left most digit can also be changed to a dash (-) to enter a negative number. The <OK> key is pressed to accept the number that has been entered and return to the menu item. Upper and lower limits are placed on some entries and an entry outside this range will cause the indicator to display dashes (i.e. - - - - - -). Example: Setting Scale Capacity Press [ZERO] (<GRP>) repeatedly to display the BUILD group. Press [TARE] (<ITM>) repeatedly to display the CAP item. Press [GROSS/NET] (<SEL>) to select CAP and display the current setting (e.g. 0000.00lb). The currently chosen digit will be flashing. Press [GROSS/NET] (<SEL>) to advance to the next digit. When the digit to edit is flashing, press [PRINT] (<EDT>) repeatedly to cycle from 0 through 9. When the new digit to be set is flashing either press <SEL> to move to the next digit to edit and repeat the previous step; or press [ f ]<OK> or [TARE] <ITM> to accept all of the displayed digits (including the flashing digit) and re-display the menu item name. KEYPAD All Models of the 250 utilize the same six keys in the same configuration. The material used for each model keypad is different however. Each key performs a different function in the weigh mode and setup mode. Refer to this section for a list of the keys and their function. The standard Model 250 and panel mount have six silicon rubber keys. The Model 250SS comes with a six key membrane keypad. The Model 250X offers a capacitive keypad with large easy to use keys. The Model 250X keypad has been calibrated to work with human fingers. NOTE: Do not use blunt objects to press the keys. This will cause damage to the keypad. Key POWER ZERO TARE GROSS/NET PRINT f Weigh Mode Function Cycle power Performs a gross zero function Performs an auto-tare function Switches between gross and net modes Performs a print function User defined function key. See page 25 for details Version 2.4 Page 23 Primary Function (Weigh Mode) A single press of each key triggers the weighing operation printed on it. The Model 250 allows individual keys to be disabled in the setup mode. All keys are enabled at the factory, but some keys may have been intentionally disabled (locked) during installation. If a key has been locked, a long beep sounds when it is pressed. If however, the key beeps normally, but does not appear operate, it is possible the indicator is waiting for a stable condition. Stability Considerations Once the [ZERO], [TARE] or [PRINT] key is pressed the Model 250 waits for a stable valid reading before performing the associated operation. If the weight readings remain unstable or invalid due to a diagnostic error for longer than 10 seconds, the operation is cancelled and the STABLE ERROR message is displayed. To improve the stability of the weight reading, increase the filtering or decrease the motion detection value. Refer to FILTER (Reading Average) and MOTION (Motion Detection) on page 30 for more information. POWER Key The [POWER] key is used to turn the Model 250 on and off. To initially turn the indicator on, press and hold the [POWER] key. The display will show the following: Display segments will light and then clear. Software Version (i.e. V1.0). Calibration Counter (i.e. C.00010). The current weight will then display. To turn the indicator off, press and hold the [POWER] key for three seconds. The Model 250 will turn OFF followed by the three-second countdown. When using batteries the backlight will automatically turn off to conserve battery power after a short period of inactivity. A short press of the [POWER] key will turn the backlight on again. Refer to B.LIGHT (Backlight Operation) page 33 for more information. Note: The [POWER] key can be locked to prevent the indicator from being turned off through the front keypad. Refer to KEY.LOC (Front Panel Key Locking) page 33 for more information. ZERO Key When an empty scale has drifted away from a true zero reading, this key is used to perform a zero adjustment on the scale display. The zero adjustment is stored when power is removed and is re-used when next powered up. The amount of weight that may be cancelled by the [ZERO] key is limited to the setting at parameter Z.RANGE (Allowable Zero Operating Range). Refer to page 31 for more information. When the indicator is set to Industrial mode a long press of the [ZERO] key will remove any stored zero adjustment. Refer to Chapter 6: Approvals on page 45 for more information on modes. TARE Key This key is used to temporarily set the scale to zero (such as cancelling the weight of a carton before performing a filling operation). The display will show the Net weight and the NET annunciator will be lit. Page 24 250 Technical Reference The weight tared is deducted from the allowable range of the scale, reducing the maximum weight that can be displayed. The tare adjustment is stored when power is removed and is re-used when next powered up. The [TARE] key can operate in all modes (i.e. Industrial, OIML and NTEP). Refer to Chapter 6: Approvals on page 45 for more information on modes. GROSS/NET Key This key toggles the weight display between the Gross weight and the Net weight if a Tare weight has previously been acquired using the [TARE] key. GSE-LINK Activation This feature is used to temporarily connect a PC to the Model 250 for calibration and setup purposes. A long press of the [GROSS/NET] key from the weigh mode will toggle the GSE-LINK infrared communications On/Off. When the GSE-LINK has been enabled the following will occur: • The indicator briefly displays the prompt opto-L. • The editing annunciators (i.e. GRP, ITM, etc.) will flash for up to five minutes while the indicator searches for activity. During this time period, the Model 250 also disables the RS232 communications. If the indicator is successful in locating activity, the editing annunciators will continue to flash during the entire period of communications. If the indicator fails to locate activity, the GSE-LINK will be disabled and the editing annunciators will stop flashing. The Model 250 will also revert back to the normal RS-232 communications (i.e. the SERIAL:TYPE setting will be re-activated). PRINT Key If a printer or computer has been attached to the Model 250 and the manual print function has been selected, the [PRINT] key will trigger an output of the current weight reading. The PRINT prompt is displayed while waiting for the printer to accept data. If the printer is offline the PRINT prompt will remain for a maximum of 10 seconds before the operation is cancelled. Each weight printed is automatically added to an internal total weight. A long press of the [PRINT] key will print the accumulated total. The total weight is then cleared automatically. FUNCTION Key When leaving the factory, the [ f ] key has no function programmed. The primary function of this key can be selected from a number of different choices including peakhold, counting, etc. Refer to page 37 for details of the available functions. Each primary function has an associated overlay sticker that should be applied underneath the [ f ] key to label the function of the key. A long press of the [ f ] key may be used for certain functions depending on the primary function of the key. Version 2.4 Page 25 Press and hold the [GROSS/NET] key for 3 seconds to connect. port or opto-link if used and click “OK”. If the GSE-link is being used go to step 4. 4. Power up the indicator. 3. After the reflash is complete. 2. 9. 6. Click on the "Start" button on the reflash program. "programming flash" will be shown and also a progress status bar. At "Connecting the Unit to PC" screen. 8. Double click on reflash file program (GSE icon) to start. The firmware is loaded into a flash memory IC via the RS-232 port or GSELink. Attach GSE Link or RS-232 cable to the indicator and to a PC. Exit the program by clicking on the X to close the window. 7. the program will display. Otherwise go to step 5.Lock 250X Keypad for Wash-Down Refer to the WD. The indicator will display "Prog". On the PC. 5. and the bottom of the indicator display will flash.LOC parameter on page 34 for details on setup and use. UPDATE MODEL 250 FIRMWARE The Model 250 has flash memory on the main board. click "Next". "Unit successfully programmed!" 10. Select PC comm. It is possible to update the firmware simply by using a computer. "opto-L" will flash on the indicator. Follow the instructions below to reflash the indicator: 1. This allows for ease of loading firmware updates and product enhancements. Page 26 250 Technical Reference . Changes to access codes and restoring the factory default settings can only be accessed in Full Setup mode. Care should be taken to avoid inadvertently altering the Build or Calibration settings. • For the 250X press and hold the [POWER] and [GROSS/NET] keys together for two seconds. Setting an access code for Full Setup restricts any access to Full Setup. These items will however not increment the calibration counter. SAFE SETUP The Safe Setup method restricts access to the trade critical settings. first ensure the indicator is on. refer to the Setup Menu Quick Reference on page 69. • Full Setup Access code • Safe Setup Access code The Full Setup access code can also be used to access Safe Setup FULL SETUP The Full Setup method provides access to all functions in Setup. To access the Full Setup mode.4 Page 27 . or if an attempt is made to alter a trade critical setting while in Safe Setup. Changes in Full Setup mode may result in the calibration counter being incremented. • For the 250 and 250SS press and hold both the [POWER] and [f ] keys together for two seconds.PC (Safe Security Access code for Digital Setup) page 33. the indicator will respond with the message “ENTRY DENIED”. If an attempt is made to enter Safe Setup mode using the incorrect access code. To access Safe Setup. Setting an access code for Safe Setup restricts access to Safe Setup functions. Refer to SAFE. the indicator will respond with the message “ENTRY DENIED”. Version 2. Refer to FULL. including legal for trade and calibration sensitive settings.PC (Full Security Access code for Digital Setup) page 33. first ensure the indicator is on. Changes made in this mode will not increment the calibration or setup counter.Chapter 4: Setup ACCESSING THE SETUP MODE The Model 250 has two levels of access code protection to provide a security lock on accessing Setup via the keypad. • For the 250X press and hold the [POWER] and [TARE] keys together for two seconds. For further details of menu items available in each setup mode. If an attempt is made to enter Full Setup using the incorrect access code. • For the 250 and 250SS press and hold both the [POWER] and [ZERO] keys together for two seconds. WARNING All menus and items will be enabled in Full Setup. 00010) Setup Mode Counter (i. and return to the normal weighing mode use one of the following methods. Page 28 250 Technical Reference . The indicator will beep and then display the following: SAVING Software Version (i. C.e.0). On the fourth attempt the user will be 'locked out' of Full/Safe setup. • Method 3: Press the [ZERO] (GRP) key until End is displayed and then press [TARE] (ITM). The access code counter will be reset to zero (allowing the user to enter the correct access code).e. SETUP LOCK OUT If an attempt is made to enter Full or Safe Setup using an incorrect access code. Calibration Counter (i. To reset the access code counter.e.SETUP DISPLAY PROMPTS When accessing Full or Safe Setup the indicator will beep twice and then display the following: FULL or SAFE (depending on setup access type) SETUP Software Version (i.e. unsaved settings will be lost.0). the indicator will respond with the message “ENTRY DENIED” and then the user will be returned to the weigh mode. SAFE. EXIT THE SETUP MODE To save settings. • Method 2: Press and hold both the [POWER] and [ZERO] keys together for two seconds. • Method 1: Press and hold both the [POWER] and [f ] keys together for two seconds.PC (Safe Security Access code for Digital Setup) page 32 and FULL. turn off the indicator and turn it back on.e. BUILD) will then be displayed. Calibration Counter (i.00002) if NTEP is enabled at OPTION:USE If an access code has been configured.PC (Full Security Access code for Digital Setup) page 33 for more information. The Model 250X only allows Method 3. exit setup. F.e. V1.e. Should this occur the “ENTER PASS” prompt will not display. Refer to Accessing the Setup Mode on page 27. V1. The Model 250 and 250SS can use any of the three examples.00003) if NTEP is enabled at OPTION:USE The current weight will then display. but instead the “ENTRY DENIED” message displays and returns the user to the normal operating mode.e. An access code counter has been set so that only three failed attempts can be made to access Full/Safe Setup. Warning: If the power is interrupted while in setup (i. F. The title of the first Group (i. the “ENTER PASS” prompt will display and the setup access code must be entered to gain access.00010) and Setup Mode Counter (i. by disconnecting the power cable or pressing the [POWER] key). C. allowing access to the items within the group.g. Groups and Items will be notated as follows (GROUP:ITEM). Later changes to items within this group may invalidate the current calibration data. ITM (ITEM) Each group is divided into individual Items. set this parameter first so that all other weight related values are displayed with the decimal point in the correct position. For example. SETUP PARAMETERS The following sections describe the setup parameters of each of the Groups and Items in Setup.0 and RES is set to 5. BUILD Settings within this Group are used to configure the indicator to suit the current application.4 Page 29 . The <GRP> (ZERO) key can be used to cycle through the available groups. It is important to fully set the options within this group before calibration is attempted.GROUPS AND ITEMS All keypad setup options in the Model 250 are organized in a tree structure made up of Groups and Items. with the decimal point in place. The <SEL> (GROSS/NET) key is then used to edit the item.0. All options in any one group have related functions. Pressing the <ITM> (TARE) key will enter the displayed group. t.00000 Default: 000000 CAP (Maximum Capacity) Sets the nominal maximum capacity (or full scale) of the scale. The <ITM> (TARE) key can be used to cycle through the available items. DP (Decimal Point Position) Sets the location of the decimal point on the display. Refer to Setup Menu Quick Reference page 69 for a list of all Groups and Items. Each group has a distinctive group title. Range: 000100 to 999999 Default: 003000 Version 2. To avoid confusion. This is set in weighing units (e. Can be set from 000000 (none) to 0.5 lb increments. Each item represents a parameter that can be changed. DP is set to 00000. CAP is set to 500. To simplify this manual. lb. etc. if a scale is to weigh 500.0 lb in 0. GRP (GROUP) Setup is divided into a series of Groups.). High settings will stabilize the display at the expense of rapid response to sudden weight changes. (kg) kilograms. USE (Scale Use) This is where the basic use of the scale is set (legal for trade). (lb) pounds.5. 4.0. Refer to page 45 for more information.0. OIML or NTEP Default: INDUST FILTER (Reading Average) The Model 250 can average a number of consecutive readings when calculating the displayed weight. 0. 2. Options are: ON or OFF Default: OFF CABLE (4-Wire or 6-Wire) Sets the load cell input to operate in 4-wire (auto sense) or 6-wire mode.2. (o) ounces (250X only). OIML or NTEP operation.0-1. This setting configures the indicator for Industrial. Options: OFF. When set to OFF.5 (seconds) MOTION (Motion Detection) Sets how much weight variation over a defined time period is allowed before the displayed weight is considered to be unstable.RES (Count-by Resolution) Sets the resolution (Count-by) of the display. 5.5-1.0. 10. ( ) none (i. This is used to reduce unwanted weight fluctuations caused by vibrations or dynamic forces. 20. Options are: (g) grams. Options are: INDUST (Industrial). TARE and PRINT actions are instantaneous.0. other units). the Motion Detection is ignored and ZERO.RES (High Resolution x 10 mode) Sets the indicator display weight at 10 times resolution.0 (graduations per second) Page 30 250 Technical Reference . 50 or 100 Default: 1 UNITS (Weighed Units) Sets the units for display and printing. 1. (t) tons.0 (time in seconds) Default: 0. This is intended for test purposes but may be used for non-trade weighing. Default: lb HI. 3.0 graduations) per second. Options are: NONE. The resolution is the number by which the indicator will count. Options are: 1.e. Options are: 4 or 6 Default: 6 OPTION Items within this Group are used to configure the operating parameters of the scale. 2. 0. 0. 1.5 or 1. This value is displayed as weight change (0. 5-1. Options are: ON or OFF Default: OFF Z.5 as zero. The zero 'dead' band is used by the automated functions to determine zero load. DP setting of 00000.0 (0. Options are: OFF.BAND (Zero 'Dead' Band) This is an adjustable margin either side of true zero that defines the zero 'dead' band. Certain items in the Scale Build can affect the calibration of the scale. The amount of weight that can be zeroed is limited to +/.4 Page 31 . Options are: -2_ 2. Refer to “Physical Seal” page 46 for more details. Default: 0 (i.10% of full scale. The setup button is used for a legal for trade physical seal. The ranges are in terms of percent. The setup button is used to restrict access to the full setup. When enabled. -1_ 3.Z (Initial-Zero on Startup) This function can be used to automatically ZERO the indicator during power-up. Refer to ZERO (Zero Calibration Routine) on page 42.5 graduations) R. CAL Items within this group perform various calibration routines.BAND setting of 4. FAST Default: OFF Z. For detailed scale calibration procedures refer to Chapter 5: Calibration on page 41.0 and RES of 5 will identify the readings between -4. ZERO (Zero Calibration) Select to perform Zero Calibration. While the zeroing is in progress the display will show “Z.5 to 0.RANGE (Allowable Zero Operating Range) This setting restricts the range over which the Zero functions can operate. For example: A Z.TRAC (Zero Tracking Sensitivity) Zero tracking allows the display to adjust for minor changes in the zero balance of the scale. -20_20 Default: -2_ 2 (-2% to +2%) Z.ENTRY (Program Button) This parameter enables or disables the use of the setup button located on the rear of the indicator. When the displayed weight reading is within this band the indicator displays the zero band annunciator.5 and 4. Always enter a number in multiples of the displayed resolution. Refer to Status Annunciators page 22. -0. Settable over the full weight range. SLOW.5 graduations per second) INIT.Default: 0. Refer to RES (Count-by Resolution) on page 30 for more information. the indicator will track weight readings within the zero 'dead' band back to precisely zero at a maximum rate of 0.5 (SLOW) or 10 (FAST) graduations per second. Always check that these sections are correctly configured to suit the current application before attempting to calibrate the scale. Version 2.e.in P”. While linearization is in progress the display will show “L.in P”. FAC.in P”.ZER (Direct Zero Calibration) Select to enter the mV/V value of the zero calibration directly.PC (Safe Access code) allows partial access to the Setup mode (i. ED.LIN (Clear Linearization Points) Select to view linearization setup and select linearization points to clear.SPAN (Span Calibration) Select to perform Span Calibration.LIN (Edit Linearization Points) on page 43 for more information. Refer to ED.PC (Safe Security Access code for Setup) The SAFE. key functions and display settings. OPTION and CAL menus back to factory defaults. If Cont. Y is chosen and then <OK> or <ITM> is pressed. While the span calculation is in progress the display will show “S. only non calibration/trade critical settings can be changed). DIR. the Model 250 will display “DONE” to indicate that the operation has been completed. CLR. Refer to Accessing the Setup Mode on page 27 for more information. Any other number will enable the access code functions and restrict access. Refer to CLR. calibration on a partially filled silo). For the Safe Access code to have any effect.g. Refer to SPAN (Span Calibration Routine) on page 42. This feature is used to enable approximate calibrations to be performed in situations where a standard ZERO calibration is impractical (e. The indicator will prompt with Cont.LIN (Clear linearization) page 44 for more information. key locking. This feature enables the Model 250 to be calibrated based on the rated output capacity of the load cells rather than using test weights. DIR. Y and <OK> ( f ) to continue. The accuracy of this method is limited to the accuracy of the published load cell ratings.PC access code must also be set.CAL (Restore Default Factory Calibration) Select this choice to restore default factory calibration. This restores all calibration critical settings in the BUILD. SPEC Settings within this group control features including access codes. N.e. the FULL. The default access code setting is 000000 that allows free access.LIN (Edit Linearization Points) Select to view linearization setup and start linearization routines.SPN (Direct Span Calibration) Select to enter the mV/V value of the full scale capacity of the scale build. SAFE. Range 000000 to 999999 Default: 000000 Page 32 250 Technical Reference . Press <EDT> (PRINT) to change to Cont. the characters P12345 displayed). To turn on again.FN (Key Functions) The function of the [ f ] key can be selected here.4 Page 33 .LIGHT (Backlight Operation) Sets the operation of the backlight. Options are: NONE. Options are: NEVER: Never power off automatically (Battery: powers down after 30 minutes) 1. The operation keys are numbered from the left with the [ZERO] key being number 1.PC (Full Access code) can be set to restrict access to Full Setup mode. Options are: OFF: Backlight is off ON: Backlight is always on Default: ON Version 2.H.T Default: NONE AUT. LIVE.FULL. When operating the backlight with batteries the brightness is lowered automatically to conserve power and the backlight will automatically turn off after 10 seconds of inactivity.All keys are unlocked (active) KEY. This access code is used to prevent unauthorized or accidental tampering in the indicator setup. press the [POWER] key. UNITS. Default: P12345 .PC (Full Security Access Code for Setup) The FULL.OFF (Auto Power Off / Battery Operation) The Model 250 can be set up to automatically power down after a period of no activity. the indicator cannot be turned off from the front keypad. The indicator will need to be sent back to the factory in order to regain access to the setup mode.LOC (Front Panel Key Locking) This item allows individual keys to be locked and unlocked. PEAK. Range 000000 to 999999 Default: 000000 WARNING Be sure to remember your password. SHOW. TEST. Note: When the [POWER] key is locked. The display shows a dash (-) to indicate that a key is locked (inactive) or characters for each key that is active (e. The letter P represents the [POWER] key and the numbers 1234 and 5 represent the remaining operation keys. Any other number will enable the access code functions and restrict access. Refer to Special Functions page 37 for details of the available key functions.g.WT. When operating on batteries the unit will turn off after 30 minutes of inactivity even if set to NEVER. 5. The default access code setting is 000000 that allows free access. KEY. HOLD. COUNT. Reflashing the unit will not clear out the password.10 (time in minutes) Default: NEVER B. Weight motion. network communications or any press of the keypad is enough to keep the indicator powered up. Refer to Accessing the Setup Mode on page 27 for more information. If the wrong key is pressed or no key is pressed the unit will turn off.VLT (Battery Voltage) The indicator can be set to run with a variety of different batteries.e.. When in the default setting of PWR the indicator will always assume it has external power.1: Enables 10 Hz automatic transmission using format 1. SERIAL Settings within this Group determine the serial and printing outputs. Refer to page 51. (2)ZERO.g. NONE) or it can be set to mimic one of the front five panel key functions (i.FN (Remote Function) This item allows the indicator to be triggered from a remote input. the indicator displays dashes (i. Turn the Model 250X off. Refer to Automatic Weight Output and Printing on page 51 for more information on serial configuration. (4)GROSS/NET. The remote input can also be set to BLANK where. 24 (Battery Voltage) Default: PWR WD. Options are: NET: Network Communications. When the remote input is released the indicator display and front key functions return to normal.-) and disable front key functions. Default: NONE BAT. PRINT: Enables printer driving. (3)TARE. Correct function of the low battery warning is dependant on correct setting of the battery voltage.. . AUTO.. 9.12.. the SERIAL:TYPE item must be set to KEY. KEY3=GROSS/NET..e. At power up the display will prompt “KEY LOCK” and prompt to UNLOCK PRESS KEY (1)POWER.LOC (Washdown Front Panel Key Locking) (250X only) This feature locks the keypad during washdown. KEY: Enables the Remote Function setting (SPEC:REM. Refer to TYPE (Serial Output Type) below for more information. Enable this feature and save the change.. Refer to page 53.-) and the front five key functions are disabled. For the REM. when the remote input is pressed and held. Default: NET Page 34 250 Technical Reference . Refer to page 51. where KEY1=ZERO.FN).8 (250 & 250SS only). KEY1 to KEY 5: Mimic one of the front five function keys BLANK: Display dashes (i.REM.2: Enables 10 Hz automatic transmission using format 2. “PASS” will be displayed if the code was entered successfully and the weigh mode will be accessed.. Refer to page 52. KEY4=PRINT and KEY5=FUNCTION). .FN to have any effect. Options are: NONE: No function. AUTO. TYPE (Serial Output Type) Sets the function of the first serial output. (5)PRINT. (6)FUNCTION.. In other battery modes the indicator will always assume it is on battery power. The port can be disabled or set to run as an automatic output or a network device. KEY2=TARE. Options are: PWR: Never powered off battery 4.e.6 (250X only). The remote input can be set to have no function (e. MASTER: Send contents of LCD display to a remote display. DISP: Use the displayed weight (gross or net). 7: Number of data bits 1.BAUD (Serial Baud Rate) The baud rate determines the serial data transmission speed. (O) Odd. Options are: GROSS: Use gross weight readings only. When Cont. OFF: Both setpoints are off. Options are: 2400. Options are: N or O or E: Parity bit: (N) None. Y has been chosen the unit will display “DONE” to indicate that the operation has been completed. Default: OFF TARG. Weights above this target will cause the setpoint to become active and output 1 to be driven. The indicator will prompt with Cont.where each character has a meaning as shown below. The indicator displays the over annunciator. Range 01 to 31 Default: 31 RST. SET.PTS OR CHECKW Settings within this group configure the setpoint (250 & 250SS) or checkweighing (250X) system. N. Range: -99999 to 999999 Default: 000000 Version 2. D: DTR handshake disabled or enabled Default: n81-.4 Page 35 . Refer to Status Annunciators page 22. Refer to Setpoints page 49 for a detailed explanation of setpoints.CON (Reset Printed Consecutive Number) Use this option to reset the printed consecutive number back to 1.HI or Over (Target for Overweight) This is the target for setpoint 1 (output 1).) ADDRES (Indicator Address) Use this option to set the Model 250 address when operating with network communications. Y and <OK> to continue. 9600 Default: 9600 BITS (Serial Format Options) The BITS parameter allows the data transmission bit pattern and interface to be changed. The display will show the current setting in the form n81. (E) Even 8. 2: Number of stop bits -. (For most applications the default setting is applicable. SRC (Weight Source) The weight source determines the weight reading that is used for the setpoint comparisons. 4800. Press <EDT> to change to Cont. When accessing this item. The indicator displays the under annunciator. The display reads in milliVolts-per-Volt. Page 36 250 Technical Reference .TARG. FORMAT (Date Format) This sets the date format.mm. Options are: dd. In OIML or NTEP modes. factory calibrated to 0. initially there should be no weight on the scale.dd.yy Default: dd.mm.yy YEAR (Set Year) Range: 2000 to 2099 MONTH (Set Month) Range: 01 to 12 DAY (Set Day) Range: 01 to 31 HOUR (Set Hour) Range: 00 to 23 (24-hour format) MINUTE (Set Minute) Range: 00 to 59 TEST Items within this Group allow access to the testing routines for the Model 250.LO or Under (Target for Underweight) This is the target for setpoint 2 (output 2). Weights below this target will cause the setpoint to become active and output 2 to be driven. Refer to Status Annunciators page 22. this display is only active for five seconds before returning to the menu.1% worst case. With these routines the scale base output can be monitored and the inputs and outputs can be tested.yy mm. Range: -99999 to 999999 Default: 000000 CLOCK Items within this group set date and time related functions. SCALE (Scale Base Test Display) Verifies the correct load cell capacity and/or load cell wiring is used. It sets up the unit as a simple test meter to measure the load cell signal output. ON. Press the [TEST] key to clear the display and show all segments of the display. The function of this key can be configured to any of the key functions detailed below. DEFLT (Factory Default) This parameter restores all setup parameters with the exception of the calibration (CAL) and build (BUILD) menus back to the original factory settings. FACTORY This is the factory adjustment menu. press <EDT> to select “Cont. SPECIAL FUNCTIONS The Model 250 has a special function key on the front panel. Refer to KEY. The default the indicator. Ensure the keypad is clean and dry before affixing the sticker. Y” and <OK> to continue. The Model 250 will prompt with “Cont.g. Version 2. The annunciator for the count mode will be distinguished by a p for pieces. Pressing <OK> will turn all outputs off and exit the test. Refer to page 28 for details. TEST The [TEST] key is used to test the functionality of the indicator’s display.4 Page 37 . The main use of this routine is to completely reset an indicator which is being installed on a different scale. The <EDT> key will advance through each output (e. COUNT The [COUNT] key is used for counting pieces. “DONE” will be displayed after the default is complete. The display will be cleared again before returning to the weigh mode.2).FN (Key Functions) on page 33 for configuration details.1 and ON. All outputs turn OFF when leaving this step. Each primary function has an associated overlay sticker (supplied) that should be applied to the function key to label the function. When leaving the factory. the [ f ] key has no primary function pre-programmed. This is the default setting. Pressing the [COUNT] key will toggle between the count and weight display.FRC.OUT (Force Outputs) Forces each of the output drivers in turn on. Refer to Cleaning page 13 for more information. N”. NONE When set to NONE the special function key is not used during normal operation. END The parameter can be used for exiting the setup mode. 2. 6. 6. During normal weighing. 4. this key operates exactly like a manual HOLD key. Be sure to use leading zeroes if sample size is less than 1000.WT. The hold function will be designated on the display with the annunciator. it is possible to determine the weight of a continually moving mass (e. UNITS Use the [UNITS] key to switch the displayed reading between lb and kg or other selected unit. Press the [LIVE WT] key to force the sample to be re-calculated. If this is the first sample with the indicator SPEC will be displayed. HOLD Use the [HOLD] key to hold a particular weight on the display regardless of a variance of weight. Access the weigh mode. Press and hold the [LIVE WT] key to switch between normal weighing and live weight mode.g. hold the [PEAK] key for 2 seconds. Press the [HOLD] key again to unlock the hold function. -30 is larger than 25). The Hold annunciator is active when the display is showing the held weight. Place the mass to be weighed on the scale.g. The default sample size will be displayed. 2. The Hold annunciator is steady when the final sample weight is shown on the display. Press the [TARE] or [ZERO] key to clear any residual weight and return the scale to the zero state.WT] key is used to enable live weight averaging. If a container is used. Once the weight moves outside the zero 'dead' band the indicator begins to calculate a long term average that compensates for any movement in the mass. Once the weight is returned to the zero 'dead' band. To clear the stored peak weight. Press and hold the [COUNT] key for two seconds. the cycle can be repeated. With this feature. The <EDT> key will enter a number and the <SEL> key will select to the next number.To perform a new sample: 1. livestock). LIVE WEIGHT AVERAGING The [LIVE. 4. Follow the steps below for In Live-Weight mode: 1. If printing is enabled the sample quantity and weight will be printed. 3. 5. Either positive or negative weight is stored in the peak value (e. The display will briefly show NORMAL or LIVE. This will affect the displayed and printed weight but will not affect entered data. Press <OK> and the selected sample size will be stored. 5. Page 38 250 Technical Reference . The indicator flashes the Hold annunciator and shows the current average value. tare off the container weight by pressing the [TARE]. Use the <SEL> and <EDT> keys to enter a new sample size. PEAK HOLD Use the [PEAK] key to hold the largest absolute weight. Place the sample pieces on the scale. 3. 4 Page 39 . Continue steps 3 and 4 for each accumulation needed. Version 2. If the application is legal for trade. A ticket will also be printed. 6. the weight must return to zero before another accumulation may be performed. The display will show “ACC ON” when the accumulation mode is enabled and “ACC OFF” when the accumulation mode is disabled. The function key will be labeled The [PRINT] key is used not only to print the current weight but also to add that weight to the current total. the weight is shown in two sections labeled with the upper six digits displayed before the lower six digits. A long press of the [PRINT] key causes the total accumulated weight to be printed and then cleared. [TOTAL].SHOW TOTAL (ACCUMULATION) The SHOW. Press the [PRINT] key to add the applied weight to the total. Press the [TOTAL] key to display count followed by the number of items in the total. 4. 1. Apply the weight to be accumulated (added to total) to the scale. 2. Access the weight mode. Turn on the accumulation feature by holding the [POWER] and [PRINT] keys simultaneously for 3 seconds. Performing an Accumulation If the total weight is too large to display in six digits. Refer to page 52 for a sample ticket. 5. 3. The SERIAL:TYPE option must be set to PRINT to activate this function.T function is used for product accumulation. This page is intentionally left blank Page 40 250 Technical Reference . OPTION settings MUST be configured before calibration is attempted. Select either of the Zero (CAL:ZERO) or Span (CAL:SPAN) calibration items.4 Page 41 . It is important that an initial Zero calibration is performed before a SPAN calibrations. that the scale is correct for Legal for Trade use. Refer to Error Messages on page 63. 3500 3000 2500 Weight (Kg) 2000 1500 1000 500 0 0 2 4 6 8 10 Load Cell Output (m V) Zero Point Span Point (preferably at full load) NOTE: Calibration points (Zero. lb). Span and Linearization) must be spaced by at least 2% of full scale from each other. an error message will be displayed and the calibration will be aborted. Always check the BUILD parameter against the approval specification. Note: It should not be assumed that just because the Model 250 has successfully calibrated a scale. Version 2. The BUILD and To perform a calibration. The chart shown below demonstrates how the zero and span points are used to interpret a weight reading from the load cell reading. If an attempt is made to calibrate outside of the permitted range.g. when in Full Setup select the CAL Group using the <GRP> key. Refer to Chapter 6 for details on approval specifics. The Span setting (CAL:SPAN) specifies a second point (preferably close to full scale) used to convert the A/D readings into weighing units (e.Chapter 5: Calibration The calibration results are stored in permanent memory for use each time the Model 250 is powered up. Note: Some of the parameters in the setup mode can affect calibration. CALIBRATION WITH TEST WEIGHTS The Zero setting (CAL:ZERO) specifies a gross zero point for the scale. The calibration routine will automatically prevent the indicator from being calibrated into an application outside of its specification. press the <ITM> key to exit the Span routine or press <SEL>. When the process is complete the display will return to weight to allow the new weight reading to be checked. The minimum acceptable span calibration weight is 2% of the scale range.SPN) specifies the mV/V value corresponding to an applied weight equal to the full scale reading. When the process is complete the weight will be displayed to allow the zero to be checked. The display will show the current weight. Change the mV/V setting to the correct value for Zero using the <SEL> and <EDT> keys. Press the <ITM> key to exit the Direct Zero routine or <OK> to repeat the operation. The closer the test weight is to full scale the better the accuracy. The Direct Zero setting (CAL:DIR. Add the calibration test weight to the scale. When the Span Calibration is complete. DIR. The display will show the current weight. <EDT> or <OK> to execute a Zero Calibration. calibration weight using the <SEL> and <EDT> keys. it is possible to calibrate the Model 250 directly by entering the mV/V readings at Zero and full scale Span. Press <SEL> or <OK> to show the calibration weight value. CALIBRATION WITH MV/V ENTRY In applications where test weights are not easily available.ZER) specifies a gross zero point for the scale. This calibration technique is not compatible with linearization. SPAN Press <SEL> or <OK> to start. <EDT> or <OK> to repeat the operation. <EDT> or <OK> to re-edit the calibration weight and repeat the operation. Page 42 250 Technical Reference . Change this to the correct Press <ITM> or <OK> to trigger the Span Calibration routine. Press the <OK> key to store the new zero calibration. The display will show Z.in P to indicate that spanning is in progress. Press <SEL>. Press the <OK> key to enter the Direct Zero setting. The display will show the current weight.ZER (DIRECT ZERO CALIBRATION ENTRY) Press the <OK> key to start. When the process is complete the weight will be displayed to allow the new weight reading to be checked.ZERO Press the <SEL> key to start.P to indicate that zeroing is in progress. Remove all weight from the scale. The Direct Span setting (CAL:DIR. A weight this small may limit calibration accuracy. The display will show S.in. Press the <ITM> key to exit the Zero routine or press <SEL>. Clearly the accuracy of this type of calibration is limited to the accuracy of the direct mV/V data. Version 2. Unused linearization points are shown with a row of dashes (e. L1. These two points are assumed to be accurately set and thus have no linearization error. and ppp is the approximate percentage of full scale where the linearization is applied. 3500 3000 2500 Weight (Kg) 2000 1500 1000 500 0 0 2 Zero P oint 4 Linearis ation P oint 6 8 10 Actu a l L o a d C e ll C h a ra cte ris tic N o L in e a ris a tio n L in e a ris a tio n Ap p lie d S pan P oint Loa d Ce ll O utput (m V ) A maximum of five linearization points can be set independently between zero and full scale. it can be seen that the trace with no linearization applied may not be linear at approximately 750 kg. a calibration of the zero and full scale span points must have been performed. Each point is shown as Ln. approximate the weight output to a non-linear scale. Press the <OK> key to enter the Direct Span setting. Change the mV/V setting to the correct full scale value using the <SEL> and <EDT> keys. Press the <ITM> key to leave the Direct Span routine or <OK> to repeat the operation.LIN (EDIT LINEARIZATION POINTS) Press the <SEL> key to step through the list of points. To perform a linearization. The display will show the current weight. Press the <OK> key to store the new span calibration.DIR.. The maximum correction that can be applied using a linearization point is + / .SPN (DIRECT SPAN CALIBRATION ENTRY) Press the <OK> key to start. L2.ppp where n is the point number (1 to 5). . more accurate weight readings can be achieved. When the process is complete the display will return to the weight to allow the new weight reading to be checked.g.050 indicates that linearization point one is active and was entered at about 50% of full scale. For example. Both the zero and full scale calibration points are used in the linearization of the scale base. Linearization is used to The chart below shows a non-linear characteristic for the load cell output. ED.4 Page 43 .-). By applying one or more linearization points. Unused or unwanted points may also be cleared. From the chart. USING LINEARIZATION This section provides instructions on the use of the linearization.2%. Press <ITM> to leave the routine or <OK> to repeat the operation. The display will show “L. . Note: All linearization points are cleared by restoring the default calibration of the indicator. Press the <OK> key to trigger the linearization routine. The menu choice will only be available when the Full Setup mode is accessed. Press <OK> to enter a corrected weight value for this point or <ITM> to exit without making changes.050 designates that linearization point one is active and was entered at about 50% of full scale. When “Cont.-). Press <ITM> to return to “CLR. The closer the test weight is to the point of maximum error in linearity the more effective the correction will be..ppp where n is the point number (1 to 5). Each point is shown as Ln. access the CAL parameter.Press <OK> to change the linearization point selected or press <ITM> to exit without making any changes. N (No) and Cont. When the process is complete the display will show the weight to allow the new weight reading to be checked before returning to the menus. The indicator will prompt to continue with “CONT.. Page 44 250 Technical Reference . The <OK> key is used to accept your choice. N”. L2.-).g. Refer to FAC. Add the calibration test weight to the scale. and ppp is the approximate percentage of full scale where the linearization is applied. . After pressing <OK>. Press <OK> to choose the linearization point to clear. CLR. L1. Use the <SEL> and <EDT> keys to enter the correct value of the calibration weight being used. Y (Yes).LIN (CLEAR LINEARIZATION) Press the <SEL> key to step through the list of points.LIN”. The zero and span settings are also cleared by this process.in P” to show that linearization is in progress. For example. L1. Y” has been chosen the cleared linearization point is then displayed the point (e.g. RESET CALIBRATION To reset the calibration to factory condition. Press <ITM> to switch between Cont. the current weight reading is displayed.CAL (Restore Default Factory Calibration) page 32. Unused linearization points are shown with a row of dashes (e. call (301) 9753058.O. Numeric tare entries cannot be received through the serial port. For details on parameter setup refer to the USE (Scale Use) section page 30.C. The following table lists the operation differences for each of these modes.nist. Version 2. Pressing [TARE] with a gross weight of zero (0) or keying in a tare value of zero (0) will not automatically switch to the net mode. or visit http://www. In order to configure the Model 250 to comply with NTEP requirements. with most states abiding by some or all of the NTEP requirements. you must ensure that the Model 250 is installed in accordance with all local regulations. (Note: For NSC requirements. sealing and audit trails. For more information.) The industrial mode operates without an reference to trade regulations.Chapter 6: Approvals REGULAR AND LEGAL FOR TRADE MODES The Model 250 may be operated in Industrial. The OIML and NTEP modes restrict certain aspects of indicator operation to ensure compliance with the respective trade certified standards. • • • • • The Model 250 NTEP Certificate of Conformance (C. This chapter contains information on NTEP and OIML regulations. A complete list of these regulations is available in the "Handbook 44" publication distributed by the National Institute of Standards and Technology (NIST). the OPTION:USE parameter must be set to NTEP.) is 05-119A2.gov. Negative tare values are not accepted. Since legal-for-trade requirements may vary. OIML or NTEP mode. This ensures the following: Serial data will not be received while in the Setup Mode. use the OIML setting. NTEP REQUIREMENTS The National Type Evaluation Program (NTEP) is a widely accepted weights and measures standard in the United States. and other requirements. Condition Underload Overload Tare Test Modes Industrial –105% of full scale 105% of full scale No restrictions on Tare Unlimited time allowed NTEP –1% or –2% of full scale depending on zero range setting 105% of full scale Tare values must be > 0 and rounded to the nearest graduation Limited to five seconds OIML –1% or –2% of full scale depending on zero range setting Full scale +9 divisions Tare values must be > 0 Limited to five seconds The Model 250 factory default parameter setup does not ensure compliance with legal-for-trade installations as mandated by local weights and measures authorities. Received alpha characters will not be displayed.4 Page 45 . 3. • The setup configuration counter will be identified by F. not the last zero acquired by pressing [ZERO]. The event counters will be displayed during the power up sequence for approximately two seconds.• • Tare rounding is enforced. Press and hold the power key for 3 seconds to turn off the indicator. the net mode is not selectable.ENTRY parameter must be set to “ON”. When the OIML mode is enabled.xxxxx (example: F. Follow the steps below to access and set the R. France. OIML REQUIREMENTS The International Organization of Legal Metrology is an intergovernmental body which harmonizes the national metrology regulations of its world wide members. The Model 250 provides an easy means of applying this type of seal as shown in Figure 8. A list of regulation publications may be obtained from the Bureau International de Métrologie Légale (BIML) in Paris. Refer to page 31 for more details. Where applicable. 1. To seal the Model 250. When the tare value is zero. In order to configure the Model 250 to comply with OIML requirements.00005). PHYSICAL SEAL The most common sealing method is a lead-wire seal. Full scale capacity is always referenced from the last zero calibration reference. AUDIT TRAIL Audit trail parameters are designated on the Model 250 at power up. This ensures the following: • • An overload condition will result when the gross weight exceeds nine graduations over the full scale capacity. enabling the NTEP parameter will override the current setting of other parameters.ENTRY parameter and place the lead seal.xxxxx (example: C. the OPTION:USE parameter must be set to OIML. Press the power key to turn the indicator back on. • The calibration counter will be identified by C. The calibration mode is enabled or disabled by pushing a button marked “setup” located on the rear of the indicator. When in NTEP mode the two individual parameters will be displayed (calibration counter and setup configuration) to indicate changes to trade specific parameters. Page 46 250 Technical Reference . Follow the instructions below to view the audit trail counter(s). the R.00005). only the calibration counter will be displayed. 2. 11. Press [POWER] + [ f ] to save the change and exit the setup mode. 8. 5. Place the physical seal plastic cover over the load cell and comm port connectors. Press the setup button to access the setup mode and make changes or calibrate. Press [POWER] + [ f ] to access the setup mode. 4. 7. 6.4 Page 47 . and then install the drill head screw.ENTRY parameter. Figure 8: Model 250 and Model 250SS Panel Mount Physical Seal Version 2. Press <OK> to accept change Press [POWER] + [ f ] to save the change and exit the setup mode. 10. Thread the wire security seal through the indentations in the plastic cover and the drill head screw. 2. Press <ITM> to the R. The setup mode cannot be accessed without pressing the Setup button again. 9. Press <GRP> until the OPTION menu is displayed.1. 3. Press <SEL> to view the parameter. Press <EDT> to turn the setup button ON if set to OFF. Figure 9: Model 250X Physical Seal Page 48 250 Technical Reference . • Setpoint 2 is an underload setpoint and its limit value is set by SET. The setpoint will trigger when the high limit value is exceeded. The setpoint will trigger when the weight falls below low limit value. Version 2. If the value falls between the over and under limits.W:UNDER value sets the value for the low limit. Refer to page 22 for details on the status annunciators. The red indication light will be lit.Chapter 7: Setpoints The Model 250 is capable of working with two internal setpoints. the green indication light will be lit. This allows the overload and underload limits to be linked to gross weights or alternatively to be linked to the current displayed weights.PTS:SRC setting allows the gross weight or displayed weight to be chosen as the source for the setpoint operation. The SET. • Setpoint 1 is configured as an overload setpoint. SETPOINT CONNECTION Refer to Setpoint Output Connection page 18 for the method of connection of the external output drivers.PTS:TARG. This allows the overload and underload limits to be linked to gross weights or alternatively to be linked to the current displayed weights. Each setpoint is associated with a physical output driver which allows control of an external light or buzzer. • Setpoint 1 is configured as the high (over) limit.W:SRC setting allows the gross weight or displayed weight to be chosen as the source for the checkweigh operation.LO value. The CHECK. SETPOINT OPERATION (250 AND 250SS) Refer to page 35 for setpoint setup parameters. The CHECK. The yellow indication light will be lit. EXAMPLE: Set an underload limit condition and overload limit condition setpoints. The status of these setpoints is displayed on the LCD.PTS:TARG. Refer to page 35 for checkweigh setup parameters. The status of the checkweighing is displayed on the LCD as well as the Over. • Setpoint 2 is configured as the low (under) limit. EXAMPLE: Set the high and low limit tolerances for the acceptance window. The CHECK. Pass and Under LEDs on the front of the indicator. The SET.W:OVER value sets the value for the high limit.4 Page 49 . CHECKWEIGH OPERATION (250X) The Model 250X is capable of performing as a check weigher.HI value sets the value for the overload limit. This page is intentionally left blank Page 50 250 Technical Reference . The characters G/N/U/O/M/E represent Gross / Net / Underload / Overload / Motion / Error. or PLC communications. This provides a number of serial output options allowing communications with external devices such as printers.g. a dedicated computer. the first character being a space. ^kg or ^^t). If there is no decimal point. the unit string is sent as ^^^ Displays “G/N/U/O/E” representing Gross / Net / Underload / Overload / Error. followed by the actual units (e. respectively Displays “M/^” representing Motion / Stable. PLCs or remote displays.4 Page 51 . The serial available functions include: • • • • Automatic Weight Output (two formats available) Network Communications Master / Slave Printing Refer to SERIAL (Serial Communications Options) page 34 for communication parameter setup details. Be advised that the calibration counter is incremented when the calibration related steps are accessed via RS-232 port or the GSE-LINK. refer to Communication Port Connection page 16. ^lb. AUTOMATIC WEIGHT OUTPUT The automatic output is normally used to drive remote displays.CHAPTER 8: COMMUNICATIONS The Model 250 offers one bi-directional RS-232 communication port or an optional fiberoptic link (GSE-Link) for seamless communication. respectively A three character string. dash (-) for negative) A seven character string containing the current weight including the decimal point. If the weight reading is not stable. computers. then the first character is a space. respectively Displays “Z/^” representing center of Zero / Non-Zero. respectively Displays “-“ representing single range Version 2. AUTO WEIGHT FORMAT STRING Choose from one of the following formats: Format AUTO1 AUTO2 Description <STX> <SIGN> <WEIGHT(7)> <STATUS> <ETX> <STX> <SIGN> <WEIGHT(7)> <S1> <S2> <S3> <S4> <UNITS(3)> <ETX> Format Explanations: Data Block Name <STX> <ETX> <SIGN> <WEIGHT(7)> <STATUS> <UNITS(3)> <S1> <S2> <S3> <S4> Description Start of transmission character (ASCII 02) End of transmission character (ASCII 03) The sign of the weight reading (space for positive. Leading zero blanking applies Provides information on the weight reading. For wiring connections and pinouts. 68 lb NET ITEMS: 2 TOTAL NET: 18.1 lb N The first line contains a six digit sequential ID number that is automatically incremented with each printing.27 lb G 10 p G 0. The six digit sequential ID number is not cleared.00 lb NET QTY: 89 p If the count mode is enabled each of the individual printouts would have a third line as discussed above and the TOTAL would have an additional QTY line as follows: Page 52 250 Technical Reference .4 lb G 5. the indicator prints the sample in the following format: SAMPLE: 10 p = 6.PRINTING The Model 250 comes standard with a single fixed printing format that is as follows: 000048 12/05/2006 15:10 121.00 lb T 8.45 lb NET ITEMS: 0 TOTAL NET: 0. Accumulation: GROSS ITEMS: 3 TOTAL GROSS: 29. If counting is active.82 lb Accumulation with count: GROSS ITEMS: 5 TOTAL GROSS: 11. units and G for Gross or N for Net. A long press of the [PRINT] key will print a ticket and clear these totals.27 lb N Whenever a new sample is taken. up to a maximum of 999999. prints the accumulated total and number of accumulations. the indicator accumulates the weight.17 lb In addition to the printout. The first line also contains the current date and time. The second line shows the displayed reading.3 lb T 116. the printout has a third line for the counting information (p for pieces) as follows: Counting: 000168 06/03/2007 12:58 8. Be sure to click on the connection type (RS-232 or GSE-link) and then set the protocol. be sure to press and hold the [GROSS/NET] button on the Model 250 until all annunciators are flashing. Communicate with the Model 250 To establish a connection click on the CONNECT button. Log and Test tabs will be available.4 Page 53 . the software revision must be 1. Send commands to the indicator Version 2. A port settings screen will appear. Once a connection is established the Model 250 display will be echoed to the software.5 or higher. A screen similar to the one below should be displayed. etc. Click on the GSE View 200 icon to launch the GSE View Software. Click the Read Settings button to view the Setup and Calibration tabs. Simply connect the GSE Link cable or an RS-232 cable to the indicator and computer. If a GSE Link is being used. In order to use GSE View with the Model 250X. This is essentially the same as AUTO output but the format of the output string is designed to allow a remote display to exactly copy the contents of the LCD including all of the annunciators and user prompts.MASTER SERIAL OUTPUT In Master mode. ADVANCED COMMUNICATION USING GSE VIEW SOFTWARE Software is available for the Model 250 which makes parameter setup simple. The Display. Tab Display Setup Calibration Log Test Description Shows the display of the connected Model 250 View setup parameters and make changes Calibrate the Model 250 Plot out weight readings of 4 separate digital inputs Use as a communication terminal. Refer to page 34 for setup details. the Model 250 sends out the entire contents of the LCD every 100msec. The Model 250 indicator contains a number of registers. The indicator is configured by reading and writing the information stored in these registers. The Model 250 has registers of different types to hold weights. 20 mm rrrr : optional_value Commands Read Literal Value 05 Value to write (in hexadecimal) Read Final Value 11 in Hex Write Final Value 12 Gross Weight Net Weight Target High Target Low Keypress System Status System Error 0026 0027 0171 0172 0008 0021 0022 Figure 11: Commonly Used Registers and Commands Page 54 Registers 250 Technical Reference . and save the settings as a new file.It is possible to view the parameter settings. etc. menu options. PROTOCOL SUMMARY NOTE: The values used with the Read Final and Write Final commands are hexadecimal. Click on that particular Group to view individual items (parameters). Figure 10: Settings Screen Under the Settings tab are all of the Groups of the parameter setup. Information such as gross weight is obtained by reading the register. make changes to the parameters. 00010 Version 2. The entered value is always preceded with 20 and is followed with the hexadecimal code for the type of transaction and then the register of the stored data.4 Page 55 . enter the following code: Enter 20050027: Then enter one of the following commands: Command Send <Alt> 013 <Alt> 010 <CR><LF> Program GSE View Communication Plus Other terminal program 20 05 0027 : Commands Read Literal Value 05 No value needed Read Final Value 11 in Hex Write Final Value 12 Gross Weight Net Weight Target High Target Low Keypress System Status System Error 0026 0027 0171 0172 0008 0021 0022 The indicator will respond with a message similar to the following: 9F050027: 4.23 lbs was returned Codes for Read Literal Value Registers Register Description Version of the protocol Copyright message Model of indicator Software version Indicator serial number Contents of LCD display memory Save settings command Start of menu definitions OIML calibration counter NTEP calibration counter NTEP configuration counter Registers Code 0001 0002 0003 0004 0005 0009 0010 0011 0012 0013 0014 Example V1. It is possible to print out the displayed gross or net weight with the units and G for Gross or N for Net weight.EXAMPLE: READING A WEIGHT OR SETPOINT VALUE This example shows how to capture the Net weight. Also view the values of the high and low setpoint targets.23 lb N A Net weight of 4. To view the Net weight.00011 F.0 © GSE 2006 250 V1.20 3123456 0100005B6D3F 00000033 C. Register Description Counts each new reading Indicator status Indicator error status Absolute signal in mV/V Displayed weight reading Gross or Net weight Gross weight Net weight Tare weight Peak held weight Manual held weight Total weight reading Livestock weight Index for first register data Index for second register data Index for third register data Actual full access code Actual safe access code Weight used for calibration Calibrated zero mV/V Calibrated span weight Calibrated span mV/V Weight at linearization points >00100000 means no point Fullscale setting Resolution setting Decimal point position Units selection 4/6 wire operation High resolution (x10) mode Trade or industrial operation Filtering setting Motion setting Zero range setting Zero tracking setting Initial zero operation Zero band setting Type of serial output Baud rate Parity and stop bits Network address Reset printer sequence command Full date/time string Date format selection Date Month Year Hour Minute Code 0020 0021 0022 0023 0024 0025 0026 0027 0028 0029 002A 002B 002C 0042 0043 0044 00D0 00D1 0100 0111 0112 0113 0114 0118 0121 0122 0128 0129 012A 012B 0130 0131 0132 0133 0134 0135 0136 0140 0141 0142 0143 0144 0150 0151 0152 0153 0154 0155 0156 Example 00169196 00000200 00000000 00006187 000005DC 000005DC 000005DC 000001F4 000003E8 000009C4 00000000 000009C4 0000001F4 00000001 00000002 00000005 000004D2 000009C4 000005DC FFFFFFFF 000009C4 000061A8 08000001 00000BB8 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 0000001F 10/16/2005 10:32 00000000 00000011 0000000A 000007D3 0000000A 00000020 Page 56 250 Technical Reference . Version 2. The entered value is always preceded with 20 and is followed with the code for the type of transaction and then the register of the stored data. To perform a TARE keypress remotely. It is possible to simulate keypad keypress via RS-232 or GSE-link. See the Codes for Keypad Related Registers chart for a reference of related codes.4 Registers Page 57 . key in the following: Enter 20120008:8003 Then enter one of the following commands: Command Send <Alt> 013 <Alt> 010 <CR><LF> Program GSE View Communication Plus Other terminal program 20 12 0008 : 8003 Commands Read Literal Value 05 Keypress value to write (in hexadecimal) Read Final Value 11 in Hex Write Final Value 12 Gross Weight Net Weight Target High Target Low Keypress System Status System Error 0026 0027 0171 0172 0008 0021 0022 The indicator will respond with a message similar to the following: 9F120008:0000 Where the value after the “:” indicates no key was pressed. Refer to the chart below for the hexadecimal code for each key.Register Description Second Key locking Special function setting Auto power off setting Backlight options Remote key function setting Setpoint target high Setpoint target low Counting sample quantity Code 0157 0160 0161 0162 0163 0164 0171 0172 0180 Example 00000015 00000000 00000000 00000000 00000000 00000000 000007D0 000003E8 0000000A EXAMPLE: REMOTE KEYPRESS This example shows how to perform a keypress remotely. Codes for Keypad Related Registers Description No key pressed Code 0000 Access Setup Access to full setup menu 7001 Access to safe setup menu 7002 Key Functions Zero function 7201 Tare function 7202 Gross/Net function 7203 Print function 7204 User F1 function 7205 Power key press 7301 Power off function 7302 Physical key codes Power 8001 Zero 8002 Tare 8003 Gross/Net 8004 Print 8005 F (Function) 8006 Long presses (> 2 seconds) of the physical keys Power 8081 Zero 8082 Tare 8083 Gross/Net 8084 Print 8085 F (Function) 8086 EXAMPLE: READING A VALUE IN HEXADECIMAL This example shows how to view the Gross weight as a hexadecimal value. The entered value is always preceded with 20 and is followed with the code for the type of transaction and then the register of the stored data. Enter 20110026: Then enter one of the following commands: Command Send <Alt> 013 <Alt> 010 <CR><LF> Program GSE View Communication Plus Other terminal program Page 58 250 Technical Reference . 4 Page 59 .20 3123456 0100005B6D3F 00000033 C.00011 F. this value is 295. Register Description Version of the protocol Copyright message Model of indicator Software version Indicator serial number Contents of LCD display memory Save settings command Start of menu definitions OIML calibration counter NTEP calibration counter NTEP configuration counter Counts each new reading Indicator status Indicator error status Absolute signal in mV/V Displayed weight reading Gross or Net weight Gross weight Net weight Tare weight Peak held weight Manual held weight Total weight reading Livestock weight Index for first register data Index for second register data Index for third register data Registers Code 0001 0002 0003 0004 0005 0009 0010 0011 0012 0013 0014 0020 0021 0022 0023 0024 0025 0026 0027 0028 0029 002A 002B 002C 0042 0043 0044 Example V1.0 © GSE 2006 250 V1. In decimal.20 11 0026 : Commands Read Literal Value 05 Value to write (in hexadecimal) Read Final Value 11 in Hex Write Final Value 12 Gross Weight Net Weight Target High Target Low Keypress System Status System Error 0026 0027 0171 0172 0008 0021 0022 The indicator will respond with a message similar to the following: 9F110026:00000127 Where the value after the ":" (00000127) is the hexadecimal value of the gross weight without any decimal places or units.00010 00169196 00000200 00000000 00006187 000005DC 000005DC 000005DC 000001F4 000003E8 000009C4 00000000 000009C4 0000001F4 00000001 00000002 00000005 Version 2. Register Description Actual full access code Actual safe access code Weight used for calibration Calibrated zero mV/V Calibrated span weight Calibrated span mV/V Weight at linearization points >00100000 means no point Fullscale setting Resolution setting Decimal point position Units selection 4/6 wire operation High resolution (x10) mode Trade or industrial operation Filtering setting Motion setting Zero range setting Zero tracking setting Initial zero operation Zero band setting Type of serial output Baud rate Parity and stop bits Network address Reset printer sequence command Full date/time string Date format selection Date Month Year Hour Minute Second Key locking Special function setting Auto power off setting Backlight options Remote key function setting Setpoint target high Setpoint target low Counting sample quantity Code 00D0 00D1 0100 0111 0112 0113 0114 0118 0121 0122 0128 0129 012A 012B 0130 0131 0132 0133 0134 0135 0136 0140 0141 0142 0143 0144 0150 0151 0152 0153 0154 0155 0156 0157 0160 0161 0162 0163 0164 0171 0172 0180 Example 000004D2 000009C4 000005DC FFFFFFFF 000009C4 000061A8 08000001 00000BB8 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 0000001F 10/16/2005 10:32 00000000 00000011 0000000A 000007D3 0000000A 00000020 00000015 00000000 00000000 00000000 00000000 00000000 000007D0 000003E8 0000000A Page 60 250 Technical Reference . set the Target High value to 500 lb. Enter 20120171:1F4 (1F4 in hexadecimal = 500 decimal) Then enter one of the following commands: Command Send <Alt> 013 <Alt> 010 <CR><LF> Program GSE View Communication Plus Other terminal program 20 12 0171 : 1F4 Commands Read Literal Value 05 Set high target value of 500 decimal (in hexadecimal) Read Final Value 11 in Hex Write Final Value 12 Gross Weight Net Weight Target High Target Low Keypress System Status System Error 0026 0027 0171 0172 0008 0021 0022 The indicator will respond with a message similar to the following: 81120171:0000 Where the "0000" value after the ":" indicates no errors. See the Error Codes (Registers) chart for a reference of related codes. Make sure the units are configured for lb at the BUILD:UNITS parameter.4 Registers Page 61 .EXAMPLE: SETTING A VALUE For example. Version 2. Type REG_ERR_NONE REG_ERR_ERROR REG_ERR_UNKNOWN REG_ERR_NOT_IMPLEMENTED REG_ERR_ACCESS_DENIED REG_ERR_UNDER_RANGE REG_ERR_OVER_RANGE REG_ERR_ILLEGAL_VALUE REG_ERR_ILLEGAL_OPERATION REG_ERR_CANNOT_SAVE REG_ERR_BAD_PARAMETER REG_ERR_MENU_IN_UES REG_ERR_RESERVED_4 REG_ERR_RESERVED_3 REG_ERR_RESERVED_2 REG_ERR_RESERVED_1 REG_ERR_DATA_ERROR Code 0000H 8000H 4000H 2000H 1000H 0800H 0400H 0200H 0100H 0080H 0040H 0020H 0010H 0008H 0004H 0002H 0001H Description No errors occurred Always set to show an error Unknown error – internal use only Feature not implemented on this device Action not permitted for the current access rights Value less than RangeMin Value greater than RangeMax Value not compatible with data type Operation not defined Write operation failed Parameter not valid Cannot modify register values while SETUP menus are active Reserved for future use Reserved for future use Reserved for future use Reserved for future use Internal data error Page 62 250 Technical Reference .ERROR CODES (REGISTERS) The error code returned when a command is not processed correctly is a hexadecimal value that is a combination of the following constants. The weight is above the maximum allowable weight reading. These messages are described below. Solution Increase the weight or decrease the minimum allowable weight reading. Remove weight from load receiving element. first the (XXXXX) part. then the (YYYYY) part. Wait for motion to cease and try the operation again once the scale is stable. Check the condition of load cell connections. Check for damaged load cell. Turn the Model 250 off. Refer to Using Linearization on page 43 for more information. When the indicator is turned back on. (O . Entered linearization point must be between zero and full scale.. Short messages (XXXXX) will appear as a single message on the display. Points must be spaced by at least 2% of full scale from each other..-) (ZERO) (ERROR) (STABLE) (ERROR) The weight reading is beyond the limit set for Zero operation. Error Message (U . The indicator cannot be zeroed at this weight. Refer to Setup Lock-Out on page 28 for more information. (ENTRY) (DENIED) More than three attempts have been made to access the setup mode with the incorrect access code.. An attempt has been made to place a calibration point too close to an existing calibration point.overloading may damage mechanical scale elements.. Increase the Zero Range (Z. Check the resolution (count-by) and capacity settings. Solution Access Full Setup to edit the parameter.TOO) (CLOSE) (RES) (LO) (HIGH) (SPAN) Version 2.PT) (LO) (PT. Re-enter the calibration point.RANGE) or use the [TARE] key instead.4 Page 63 .000 graduations. enter the correct access code to access setup. (LIN. Check the resolution (count-by) and capacity settings.Chapter 9: Troubleshooting ERROR MESSAGES A number of error messages may be displayed to warn of operation outside of the acceptable limits. WEIGHING ERRORS These messages show status messages or errors that may occur during normal weighing operation (weigh mode). The scale is configured for less than 100 graduations. SETUP AND CALIBRATION ERRORS These messages show status messages or errors that may occur during the setup and calibration (setup mode). Error Message Description The indicator may be in Safe Setup and a parameter that requires Full Setup has been selected for editing. The scale is configured for more than 30. Warning .-) Description The weight is below the minimum allowable weight reading.. Scale motion has prevented a [ZERO] or [TARE] operation from occurring on command. An attempt has been made to set a linearization point below zero.. Longer messages (XXXXX) (YYYYY) will appear on the display in two parts. The operation of the [ZERO] key is limited in the setup during installation. An attempt has been made to calibrate zero above +2mV/V. Scale wiring incorrect. Error Message (E0001) (E0002) (E0020) (E0100) (E0200) (E0300) (E0400) (E0800) (E2000) (E4000) Description The power supply voltage is too low. Solution Check supply Check scale / cables Enter the correct graduation size at BUILD:DP and BUILD:RES enter setup recalibrate Enter setup and calibrate Return for Service Return for Service Check BUILD:CABLE setting. The number of graduations has been set too low or too high. Incorrect span weight entered (must be between zero and full scale). The load cell signal range (span) is too large for these settings. These errors will be displayed as an E type error message.Error Message (LO) (SPAN) (SPAN) (HI) (ZERO) (LO) (ZERO) (HIGH) Description Solution Incorrect span weight entered (must be between zero and full scale). The power supply voltage is too high. etc. An attempt has been made to calibrate zero below -2mV/V. All setup information has been lost The factory information has been lost. DIAGNOSTIC ERRORS The Model 250 will display specific codes for faults or out of tolerance conditions. wiring. Scale wiring incorrect Remove all weight from scale. Load cell capacity too small for application. This may be caused from a broken load cell cable. The load cell signal range (span) is too small for the current settings. Wrong load cell capacity (too large). Check load cell cable. Re-enter setup Page 64 250 Technical Reference . The battery backed RAM data has lost data. The calibration information has been lost. Wrong or no calibration weight added to scale. Scale wiring incorrect. Scale wiring incorrect. The digital setup information has been lost. The EEPROM memory storage chip has failed ADC Out of Range Error. 4 Page 65 .Appendix DIMENSIONAL DRAWINGS Model 250 (Plastic Enclosure) Panel Mount Version Dimensions shown in mm 3D View Front View Side View Back View Version 2. Model 250 (Plastic Enclosure) Desk Mount with Battery Compartment Version Dimensions shown in mm 3D View Front View Side View Back View Page 66 250 Technical Reference . 4 Page 67 .Model 250 (Stainless Steel Enclosure) Panel Mount Version Dimensions shown in mm Version 2. Model 250X IP69K version Dimensions shown in mm Wall Mount Indicator with Swivel Bracket 3D View Front View Side View Bottom View Page 68 250 Technical Reference . CON (Reset Printed Consecutive Number) SRC (Weight Source) TARG.FN (Key Functions) AUT.END - 1 Version 2.HI (Target for Overweight) TARG.PC (Full Security Passcode for Digital Setup) KEY.LOC (Front Panel Key Locking) KEY. Group (GRP) Item (ITM) DP (Decimal Point Position) CAP (Maximum Capacity) RES (Count-by Resolution) UNITS (Weighed Units) HI.PC (Safe Security Passcode for Digital Setup) FULL.OUT (Force Outputs) DEFLT (Restore Factory Settings Except for Calibration and Build) Save settings and return to normal weighing mode. 1 Full Setup only.FN (Remote Function) BAT. Page 29 29 30 30 30 30 30 30 30 31 31 31 31 31 31 32 32 32 32 32 32 32 33 33 33 33 33 34 34 34 35 35 35 35 35 35 36 36 36 36 36 36 36 36 37 37 37 BUILD ⊗ ⊗ ⊗ ⊗ ⊗ ⊗ ⊗ ⊗ ⊗ ⊗ ⊗ ⊗ ⊗ ⊗ ⊗ ⊗ ⊗ ⊗ ⊗ 1 OPTION CAL SPEC SERIAL ⊗ SET.RANGE (Allowable Zero Operating Range) Z.LIN (Clear Linearization Points) DIR.OFF (Auto Power Off / Battery Operation) B. Changing this setting will increment the Calibration Counter.ZER (Direct Zero Calibration) DIR.LO (Target for Underweight) FORMAT (Date Format) YEAR (Set Year) MONTH (Set Month) DAY (Set Day) HOUR (Set Hour) MINUTE (Set Minute) SCALE (Scale Base Test Display) FRC.SETUP MENU QUICK REFERENCE Note: ⊗ Full Setup only.BAND (Zero 'Dead' Band) USE (Scale Use) ZERO (Zero Calibration) SPAN (Span Calibration) ED.Z (Initial-Zero on Startup) Z.VLT (Battery Voltage) TYPE (Serial Output Type) BAUD (Serial Baud Rate) BITS (Serial Format Options) ADDRES (Instrument Address) RST.LIGHT (Backlight Operation) REM. Changing this setting will not increment the Calibration Counter.CAL (Restore Default Factory Calibration) SAFE.SPN (Direct Span Calibration) FAC.TRAC (Zero Tracking Sensitivity) Z.4 Page 69 .LIN (Edit Linearization Points) CLR.PTS CLOCK TEST FACTRY .RES (High Resolution x 10 mode) CABLE (4-Wire or 6-Wire) USE (Scale Use) FILTER (Reading Average) MOTION (Motion Detection) INIT. This page is intentionally left blank Page 70 250 Technical Reference . 24. 25. 17 Version 2. 62 Error messages.VLT. 24. 55 Exit the setup mode. 24. 23. 27 Count. 62 Electrical safety. 13 BAT. 21 Cleaning. 2 DP. 24 direct span. 25 safe setup. 38 AUT. 35 direct zero. 62 DC power supply. 57 DIR. 55 linearization. 45 Annunciators setup mode. 62 CLR. 35. 62 DIR. 62 FRC. 24.LIGHT.LIN. 18 Force output. 21. 26 BAUD. 7 NTEP. 22. 6 Decimal point. 22. 62 Calibration. 15. 62 Capacity. 62 Basic operation. 5 CLOCK. 31 Address.LIN. 62 DAY. 62 FILTER. 24. 34 with test weights. 21.ZER. 25. 35 mV/V entry. 28. 62 FULL.CAL. 62 Document conventions. 24. 6. 28. 26. 34 restore. 34 Calibration counter. 27 Advanced communication. 19 Accumulation. 29 FACTRY. 5 END. 29 Count by resolution. 25. 62. 33.4 Page 71 . 62 Front panel key locking. 21. 62 Automatic weight output. 24. 34.INDEX 4 4-Wire Connection. 29. 62 Edit linearization points. 14 Audit trail. 24. 36. 24. 28. 48. 34. 62 Force outputs. 34 edit linearization points. 25. 62 C CABLE. 35 errors. 52. 62 Factory default. 48. 24. 62 6 6-Wire Connection. 36 span. 62 Firmware update.PC. 33. See Time & Date Date format. See Cable connections. 19 full setup. 28 FORMAT. 20. 33 zero. 7 CAL. 21. 28. 28. 24 Accessing the setup mode. 28.SPN. 56 Dimensional drawings. 22. 36 clear linearization points. 29.OFF. 27. 7 A Access codes. 47 OIML. 20. 19 safe setup. 38 F FAC. 28. 62 DEFLT. 62 clear linearization. 35. 23. 19 full setup. 47 CAP. 62 Function key. 62 BITS. 24.OUT. 29. 52. 43 D Date. 14 status. 24. 62 Connecting shields. 62 E ED. 12 Consecutive number reset. 35. 62 BUILD. 62 B B. 16. 62 Diagnostic errors. 7. 62 Motion detection. 46 K Key functions. 18 REM. 22. 22. 14. 22. 62 Reset printed consecutive number. 15 H HI. 23. 9 RES. 22. 44 type. 62 Keypad. 5 PEAK HOLD. 21 GSE view software. 26. 50 tare key. 62 high. 28.in P. 24. 62 Remote input. 45 MINUTE.LOC. 16 weigh mode.FN. 25. 62 Initial zero. 28. 21 GRP. 45 M Manual set. 62 Key locking front panel. 62 Reflash. 16 Print key. 24. 28. 8 RST.RES. 62 L L. 9 Remote key. 27. 62 Quick start manual. 37 audit trail. 30 Load cell connection. 62 Remote display. 37 INIT.G General warnings. 45 sample. 9 Remote function. 62 KEY. 16 print key. 17 Printer connection. 62 MONTH. 30 LIVE. 62 RS-232 serial. 15.CON. 25. 44 master serial output. 30 annunciator. 37 OIML. 23 Item. 62 Restory factory calibration. 21 P Panel mount. 62 High resolution. 22. 26 Protocol summary. 62 Restore factory settings. 62 I Industrial mode. 38 physical seal. 62 MOTION. 17 gse view communication. 62 KEY. 25. 21 Groups and items. 36 Legal for trade. 14 NONE. 17 Gross/net key. 45 Group. 7 Load cell signals. 22 N Net annunciator. 38 NTEP. 17 power key. 11 OPTION. 7 4-wire. 5 Gross/net GSE-link activation. 30 Physical seal. 14 Page 72 250 Technical Reference . 17 Gross/net key. 16 zero key. 27 Resolution. 44 count. 2 R Reading average. 15 function key. 17 related register codes. 21 ITM. 16 Q Quick reference setup menu. 38 Power key. 62 Initial zero. 14. 7 Low battery annunciator.FN. 44 sequential ID number.Z. 28. 25. 7 6-wire.WT. 62 O Operator manual. 62 HOLD. 22. 22. 2 Master serial output. 29 Numeric entry. 14 HOUR. 38 Live weight averaging. 9 Printing. 2 Option GSE-link. 26. 25. 22. 24. 29 hold. 28. 22. 28 SET. 26 master output. 26. 62 Time & Date. 24 SAFE. 16 Status annunciators.BAND. 27 low target. 62 Scale base test display. 23.LO. 15 TARG. 62 Set hour. 15 SCALE. 30 peak hold. 41 Technical reference manual. 14 Targets. 62 SPEC. 2 Stability considerations. 62 Set minute. 8 SERIAL. 55 Setup lock out.PTS. 15 weigh mode. 15 Zero operating range. 23 Sealing audit trail. 3 TYPE. 21 SHOW. 27. 19. 27. 62 Z. 2 Test scale base. 31 Sigma-Delta A/D converter. 41 output connection.T. 62 Z Z. 30 live weight averaging. 27. 55 Weight display. 23 Version 2. 62 Set year. 13 Y YEAR. 62 Zero initial. 24 Safe setup access code. 45 output type. 62 Setpoint connection. 30 Specifications. 62 low. 24. 62 Special functions. 41 high target. 27 Setup access button. 34. 62 Setpoints weight source.in P. 28. 30 UNITS. 29.S S. 62 Scale Build. 16 setup mode. 38 Selections and options. 62 Scale setting capacity. 20 Setup errors. 62 Units display. 28 Set month. 23 ZERO. 29 units. 20 Setup menu quick reference. 27 operation. 28. 62 TARG. 13 USE. 34. 38 physical seal. 27. 29 accumulation. 14 Setup parameters.HI. 62 Target high. 34 Z. 37 Tare key. 14 Zero calibration.TRAC. 23. 31 count. 30. 26. 15 weigh mode. 62 Zero annunciator. 15 Serial baud rate. 14 Zero band. 62 Setup mode annunciators. 16 setup mode. 62 Z. 27 RS-232. 30 test. 28. 24. 14 T Tare legal for trade. 23. 62 Target annunciators. 62 W Weighing errors. 26 parity. 28. 22.RANGE. 23 Setup display prompts. 62 U Units. 23 Zero tracking.in P.PC.4 Page 73 . 28 TEST. 10 Setpoint settings. 23 Zero key. 28. 62 Zero band annunciator. 1 SPAN. 62 Set minutes. 23. . 4 Part Number: 39-10-42438 .Model 250 Series Technical Reference Manual Version 2.
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