Ohaus Valor 4000 Series Technical Manual
Contents
1. Load Cell Cable leads Front Display Main PCB Load Cell Frame Rear Display PCB Ey Figure 3 2 Top and Bottom Housings 3 4 Removing Replacing the Main PCB and Display PCB If the PCBs are suspected of being faulty they should be replaced as follows 1 _ Disconnect the Cable connecting the Main PCB to the scale s power system See Figure 3 2 2 Remove the four screws that secure the PCB to the bottom housing 3 Remove the white glue on the PCB that secures the load cell connector 4 If either the Main PCB or the Load Cell is to be replaced note the order of the wire colors and then disconnect the Load Cell Cable from the Main PCB See Figure 3 2 as 8 5 149 amp vg Figure 3 3 Main Printed Circuit Board Valor 2000 4000 Series Service Manual 3 3 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE PROCEDURES 3 5 Removing Replacing the Load Cell A Load Cell that is even slightly bent or corroded should be replaced The Load Cell may also need to be replaced because of instability or because the scale does not calibrate or repeat Note The Load Cell is sold separately See Chapter 5 1 _ Unplug the cable leads connecting the Load Cell to the PCB See Figure 3 2 Remove the bolts that hold the Load Cell Frame to the Load Cell Use a high leverage Allen wrench Note There is a shim between the Load Cell Frame and the Load Cell Be careful not to2. flashes while the zero point is established r 22 Service Span Calibration point flashes The example shows the value for a Scale Capacity of 3 kg 4 Place the specified calibration weight on the pan and press Yes gt flashes while the span point is established ee 4 y If span calibration was successful the actual weight reading appears for three seconds followed by the Capacity menu item The example shows a 3 kg span weight on the pan B 6 Capacity Menu When CAP appears press YES to accept the Capacity menu item or press NO to advance to the next menu item The current Capacity Setting is displayed blinking Outlined characters represent a flashing display Note The default setting is 3 Press YES to accept the setting and move to the Service Grad menu item Press NO to enter another value using the numeric keypad and then press YES to store the new value Valor 2000 4000 Series Service Manual B 3 Ohaus Corporation www ohaus com APPENDIX B SERVICE CALIBRATION B 7 DivS When d US appears press YES to accept the DivS menu item or press NO to advance to the next menu item Set the division to either HI or Low HIGH 6000 7500 resolution LOW 3000 resolution Note This is only for non LFT mode For LFT mode the resolution will be set to 3000 e automatically B 8 S Unit When Un dk appears press YES to accept the Unit menu item or press NO to advance to the next menu item
3. 3 1 PREVENTIVE MAINTENANCE Ohaus scales are precision instruments and should be carefully handled stored in a clean dry dust free area and cleaned periodically Follow these precautionary steps When a scale has had chemicals or liquids spilled on it all exterior surfaces should be cleaned as soon as possible with warm water on a damp cloth Do not leave a mass on the scale when the scale is not in use Allow time for the scale to stabilize after moving it from an area which is at a different temperature than the area where it is to be operated Allow one hour for each 5 F 2 7 C temperature change before using the scale After temperature stabilization allow another 20 minutes after turning the scale on for the scale electronics to stabilize 3 1 1 Preventive Maintenance Checklist The scale should be inspected and checked regularly as follows 1 Remove the Pan and Sub Pan to inspect and clean the area beneath the Pan 2 Clean the outside of the scale using a damp cloth with warm water CAUTION N DO NOT USE CHEMICAL CLEANERS OR SOLVENTS OF ANY TYPE SOME CLEANERS ARE ABRASIVE AND MAY AFFECT THE SCALE S FINISH 3 Check the Power Cord for broken or damaged insulation 4 If using the rechargeable battery and the scale malfunctions first recharge the battery to see if this resolves the problem 5 Make a visual inspection for faulty connectors wiring and loose hardware 3 2 SERVICE STRATEGY All parts of t
4. Gw CHLONC O SII ic v v YW VALOR 2000W Figure 1 4 Valor 2000 Back Display 1 7 2 Power ON OFF To turn the scale on press and hold the On Zero Off button for 2 5 seconds The scale performs a display test momentarily displays the software version and then enters the active weighing mode To turn the scale off press and hold the On Zero Off button until OFF is displayed The scale can be used on AC power immediately Allow the battery to charge for 12 hours before using the scale on battery power The Scale will automatically switch to battery operation if there is a power failure or the power cord is removed With AC power the scale is constantly charging so the battery charge indicator will remain lit The scale can be operated during charging and the battery is protected against overcharging For maximum operating time the battery should be charged at room temperature During battery operation the battery symbol indicates the battery charge level remaining When charging the symbol will blink slowly and when fully charged the symbol will stop blinking TABLE 1 7 Symbol Charge Level SS Battery in use Symbol displayed Notes When battery symbol blinks fast approximately 30 minutes working time is left When Lo bRt is displayed the scale will shut off Charging the scale must be performed in a dry environment CAUTION Battery is to be replaced only by an autho
5. The available units are kg g lb oz lb oz Press YES to set the displayed unit or NO to advance to the next unit Each unit can be set to either ON or OFF ON enabled OFF disabled Note For Valor 2000 when changing unit first set the current unit to OFF then set the desired unit to ON B 9 Expand Menu When E FAMd appears press YES to accept the Expand menu or No to advance to the Reset menu item OFF disabled ON enabled Note Expand is required for various performance tests B 10 Reset Menu When r 5 t appears press YES to accept the Reset menu or No to advance to the End menu item YES Reset the Service menu to factory defaults NO keep current setting B 11 End Menu When E d appears press YES to return to exit the service menu or No to advance to the CAP menu LO Fr rESEE Ohaus Corporation www ohaus com B 4 Valor 2000 4000 Series Service Manual
6. CHAPTER 2 DIAGNOSTIC GUIDE 2 1 TROUBLESHOOTING This section of the manual contains troubleshooting information Information is contained to isolate specific problems using Table 2 4 Diagnostic Guide Follow all directions step by step Make certain that the work area is clean Handle balance components with care Use appropriate Electro Static Device 2 2 DIAGNOSTIC GUIDE Table 2 4 is a Diagnostic Guide designed to help locate the problem area quickly and easily The probable causes are listed with the most common cause first If the first remedy does not fix the problem proceed to the next remedy Before attempting to repair the balance read all chapters of this manual to be familiar with the balance components and operation 2 21 Diagnosis 1 Isolate and identify the symptom 2 Refer to Table 2 4 Diagnostic Guide and locate the symptom 3 Follow the suggested remedies in the order they appear 4 Perform the indicated checks or see the appropriate section of the manual 5 Repair or replace the defective section of the balance NOTE If more than one symptom is observed approach one area at a time and remember that the symptoms may be interrelated If a problem arises that is not covered in this manual contact Ohaus Corporation for further information Valor 2000 4000 Series Service Manual 2 1 Ohaus Corporation www ohaus com CHAPTER 2 DIAGNOSTIC GUIDE 2 2 2 Checking Load Cells for Trouble 1 Perform a Resi
7. 5 9 Ohaus Corporation www ohaus com APPENDIX A STANDARD CALIBRATION APPENDIX A STANDARD CALIBRATION amp SETUP A 1 CALIBRATION Standard calibration should be performed prior to using a scale and after service CAUTION Be careful not to touch the scale or the table while calibration is in progress as it will cause the process to fail Preliminary Steps 1 2 Be sure the scale is level and stable during the entire calibration process Allow the scale to warm up for approximately five minutes after stabilizing to room temperature To abort calibration press Exit key or turn the scale off anytime during the calibration process Before performing the calibration be sure to have the appropriate calibration weights as listed in table A 1 Valor 4000 and table A 2 Valor 2000 Ensure that the LFT PINs lock is set to unlocked positions ATN 2 Wis EMAIL o e Ede S SC EEN WD Or adjust the GEO setting according to your location see instruction manual Table A 1 Span Calibration Mass for Valor 4000 Span Calibration Mass sold separately Max Mass 1500g 1 5kg 3lb 3000g 3kg 6lb 6000g 6kg 15lb 15000g 15kg 30lb Table A 2 Span Calibration Mass for Valor 2000 Span Calibration Mass sold separately Max Mass Max Mass 1500 g 1 kg 6000 g 5 kg 3000 g 2 kg 15000g 10kg Valor 2000 4000 Seri
8. _ i YS I I Y HRN WY NN FFYN enet 1 8 1 8 Legal For Trade E 1 9 t te GE 1 9 158 2 NING AMON eet eege do Y nd ges du nda ees Y 1 9 4 0 3 Sealiha e e e aE AE NE E a ENEAS AE S E ada E E e 1 9 CHAPTER 2 TROUBLESHOOTING 2 ls Franbleshioolirid EE 2 1 2 2 Diagnostic Lagere ee Ee DE in enee 2 1 2 2 1 DIAGNOSIS E 2 1 2 2 2 Checking Load Cells for Trouble 2 2 2 2 3 Testing the Printed Circuit Board DCH 2 4 2 24 Diagnostic Gude se y FY Y yd Yd CL 2 6 CHAPTER 3 MAINTENANCE PROCEDURES 3 1 GE E Dee 3 1 3 1 1 Preventive Maintenance Checklist AAA 3 1 3 22 SONICS Strategy csere ee iaa aE EAE EEEL EE RERA EEE REEERE EKE AERAR EE a ER 3 1 3 3 OPENING in 3 1 3 2 1 Separating the Top and Bottom Housimgs eee eeeetneeeeeeeeetteeee 3 2 3 4 Removing Replacing the Main Printed Circuit Board DCH 3 3 3 5 Removing Replacing the Load Cell ee 3 4 3 6 Setting the Overload Stops ee y chai apes CY y Meade he 3 5 3 7 _ Removing Replacing the Rechargeable Battery sssssssssssssssssssssseeeseesseeeees 3 7 3 8 Replacing the Function Label Ri cada Le ud EE de Ee 3 7 Ohaus Corporation www ohaus com i Valor 2000 4000 Series Service Manual TABLE OF CONTENTS CHAPTER 4 TESTING BENS HOSTING o cana tosis Sos Mente Saree O Ad CY ne gue Sees 4 1 AAA Test Masses Required se ene uu deed 4 1 42 Operational TOSt ua i RS GR O GCR haga sar NEEN 4 1 4 3 Segment Display Teslu eu a ele AU sae eal eee es RR ee ce
9. lose it Applies to AMI 3 5kg and all Zemic load cells 2 Turn the scale over and remove the bolts and washers that hold the Load Cell to the Bottom Housing Figure 3 4 Remove the bolts holding Frame to the Load Cell 3 When installing the replacement Load Cell place the new load cell on the Bottom Housing s cavity where the two Load Cell bolts are inserted Insert the small cover screws and tighten them 4 Position the shim and Load Cell Frame on top of the Load Cell Insert the bolts and and tighten them See Table 3 1 for torque settings 5 Connect the Load Cell cables to the PCB See Figure 3 2 6 Use glue to seal the connector Ohaus Corporation www ohaus com 3 4 Valor 2000 4000 Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES TABLE 3 1 MOUNTING BOLT TORQUE SETTINGS MODEL TORQUE SETTING V41xWE1501T 6N to 8N V22xWE1501T V41xWE3T 6N to 8N V22XWE3T V41xWE6T 6N to 8N V22XWE6T V41xWE15T 6N to 8N V22xWE15T 7 Set Overload Stops as shown in Section 3 6 3 6 Setting the Overload Stops The Overload Stop gaps must be checked and reset if the Load Cell is replaced This procedure requires test masses equal to the scale s capacity See Table 3 2 There are four Overload Stop Bolts See Figure 3 5 Adjust the Overload Stops per Table 3 2 1 Adjust the Overload Stop Bolt so that the gap between the Load Cell Frame and the Overload Stop Nut is equal to
10. 1kg 500g V21xWE6T V41xWE15T 10kg 5kg 2kg V21xWE15T 4 2 Operational Test 1 Connect a functioning Power cord to the back of the scale 2 Plug the Power Cord into a suitable power source or power the scale on using battery power Assure that the battery is charged beforehand 4 3 Segment Display Test Turn the scale on and ensure that all segments are enabled and displayed briefly and followed by a software revision number Valor 4000 Series Service Manual 4 1 Ohaus Corporation www ohaus com CHAPTER 4 TESTING 4 4 Performance Tests Accurate performance of the Valor 2000 4000 scale is determined by a series of four performance tests The displayed readings are compared with the tolerances listed for each test in Table 1 2 Tolerance values are expressed in counts A one count difference is shown in the last digit on the scale display NOTE The following performance tests are used to evaluate scale operation before and a ter repairs The scale must meet the reguirements specified in each test as well as the other specifications listed in Table 1 1 Before proceeding with the following tests the scale should be calibrated See Appendix A and B 4 4 1 Precision Test The Precision Test measures the Standard Deviation of a set of similar weight readings which should match the specification for each model listed in Table 1 1 1 Power on the balance The reading on the display should be Og 2 Sele
11. 2 OHAUS SERVICE MANUAL VALOR 4000 VALOR 2000 Ohaus Corporation 7 Campus Drive Suite 310 Parsippany NJ 07054 973 377 9000 yd OHAUS SERVICE MANUAL VALOR 4000 VALOR 2000 The information contained in this manual is believed to be accurate at the time of publication but Ohaus Corporation assumes no liability arising from the use or misuse of this material Reproduction of this material is strictly prohibited Material in this manual is subject to change 30072404 Copyright 2012 Ohaus Corporation all rights reserved TM Registered trademark of Ohaus Corporation TABLE OF CONTENTS Page No CHAPTER 1 GETTING STARTED a en JEE ege eene Eeer 1 1 1 2 SSIVICS RAGING Sate fc aes NN case hice Nahas ected RY Ge oasis tea oak tha eee aa 1 1 1 3 Tools and Test Equipment Required sssssssssesseseseererreeerrrrrrrrrrrrrttrrttertrrrerrerrrrererte 1 1 1 4 Specifications E KEE 1 2 1 5 Specifications Maler Zeg geseet aleEne EES EEUR EE EENS e 1 2 1 6 Scale Operation Valor 4000 ee 1 3 1 6 1 Overview of the Etienne YE DYD 1 3 6 2 PowenOn E 1 4 1 6 3 Menu Setup EEN 1 5 1 6 4 Menu NNIG a OL IR lek ec ek oli Sot Cts on Set Cents ih at ats en aes GY 1 5 1 7 Scale Operation Valor EE eege 1 6 1 7 1 Overview of the Controle eu cect eet GO ie Geta nee Ga O di 1 6 Te 2 e OSs ote coat Pedic iY dd YE nee lec abcd dd Sse Y YCS EFO 1 7 17 3 Menu Setup EEN 1 8 1 7 4 Menu Navigation EN _
12. Tables 1 1 and 1 2 If not calibrate see Appendix A 1 and repeat the test If the Scale remains out of tolerance the Load Cell may need to be replaced 4 4 4 Off Center Load Test The Off Center Load Test is used to determine whether displayed weight values are affected by moving the sample to different areas of the Pan 1 2 3 Place half of the scale s capacity in the center of the Pan Note the reading Move the mass halfway between the center and the edge to the front of the Pan Note any differences in the displayed weight reading Repeat the test for the back left and right position of the Pan Valor 4000 Series Service Manual 4 5 Ohaus Corporation www ohaus com CHAPTER 4 TESTING 5 Maximum allowable change in displayed weight readings for each of the four positions can be found in Tables 1 1 Specifications page 1 2 If this maximum is exceeded follow procedures in Section 4 4 5 Adjusting Off Center Load 4 4 5 Adjusting Off Center Load If the Off Center Load OCL is excessive perform adjustment as follows 1 Top view of Load Cell Fixed end Side view of Load Cell Weighing Pan s center with points A D indicated Figure 4 1 Scale drawing of Valor 4000 Load Cell and Weighing Pan Place the test weight in the center of the Weighing Pan Tare the balance Move the weight to point A and record the reading Move the weight to point B and record the readin
13. applying the square root of the result from step 8 Standard Deviation Note If the balance does not meet specifications move it to a suitable location ensure that it is level and try again Ohaus Corporation www ohaus com 4 4 Valor 4000 Series Service Manual CHAPTER 4 TESTING 4 4 3 Linearity Test This test is used to determine the linearity of the unit throughout its operating range The masses used to perform this test can be utility masses A NOTE The scale must pass the Precision and Repeatability Tests and be calibrated before the Linearity Test may be performed TABLE 4 3 LINEARITY TEST MASSES Capacity g 1500x0 2g 3000x05g 6000x01g 15000x2g Reference Wt 500g 500g 1kg 2kg Load 1 200g 1000g 2kg 5kg Load 2 500g 1000g 1kg 5kg Load 3 200g 500g 2kg 2kg NOTE All masses are nominal values Use the same reference mass throughout the procedure ca a Re Fo Ja e 9 Place the test mass on the Scale record the weight and remove Place Load 1 on the Scale and press ON Zero Off Place the test mass on the Scale record the weight and remove Place Load 2 on the Scale and press ON Zero Off Place the test mass on the Scale record the weight and remove Place Load 3 on the Scale and press ON Zero Off Place the test mass on the Scale and record the weight The difference in the weights of the test mass should be within 2 d as specified in the
14. connector shown in Figure 2 1 The voltage should read O volts with power off and above 12 Volts dc with power on 5 Perform simulator testing Simulator Testing To perform these tests the use of a Simulator is required The function of a Simulator is to simulate the output of a full bridge Load Cell allowing the scale to be separated from the Load Cell for the purposes of troubleshooting and calibration The Load Cell used in the scale is rated at 2mV V output with a 4 6 4 7 Volt excitation voltage applied Ohaus Corporation www ohaus com 2 4 Valor 2000 4000 Series Service Manual CHAPTER 2 DIAGNOSTIC GUIDE General Load Test This test checks the Main PC Board circuitry by simulating accurate Load Cell voltages at zero load 50 and 100 load capacities Disconnect power from the scale and remove the Top housing See Section 3 3 1 Leave the Mechanical Switch connected to the scale Disconnect the battery 1 Disconnect the Load Cell cable from the main PC Board 2 With the Simulator set to zero solder its cable leads to their counterparts on the PCB using the Load Cell Cable solder points on the PCB See Figure 2 1 Connect a known good AC Adapter to the scale and connect to a power source 4 Turn on the scale An under load error may appear This is normal Set the scale to indicate weight in kilograms Kg and set the calibration value to maximum span value 6 Adjust the Simulator to simulate 0 load 5
15. 0 0 1 1Lei NES AO Fd See 1 6 1 7 Battery Charge Status ha ue mid een DY GT ed gd se 1 7 2 1 Load Cell Resistance Readings in Ohms eee ceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeenaaees 2 2 2 2 Color Code for Load Cell Wiring is siscccicccceecevia uae Y RL sa eect isla SEE LL nina EENEG 2 2 2 3 Load Cell Output Readings in mV with 3 3V Exvctatton 2 3 2 4 Relaise TEE 2 6 3 1 Mounting Bolt Torque SettinQs EE 3 5 3 2 Overload Stop Gap Settings ENEE 3 6 4 1 Test Mass alle uc a a cca ea a caste ne cera caaae eC anes va deans cemnes ee ca 4 1 4 2 Repeatability e Ge AO edie y Y A YN Nay 4 4 Valor 2000 4000 Series Service Manual ii Ohaus Corporation www ohaus com TABLE OF CONTENTS 4 3 Linearity Test MasSe ii u ai i na ceeddentee ceccna ver Ech EES E eeE 4 5 5 1 Housing amp Internal Parts Valor 4000PW eee eeeeeeeee eter ee eeeeeeeeeeeeeeeeeeeeeaaees 5 3 5 2 Housing amp Internal Parts Valor 4000 XW eee eeeeeeeceeeeee eter ee eeeeeeeneeeeeeeeeeeeeeenaaees 5 5 5 3 Housing amp Internal Parts Valor 2000 PW ceeeeeeeeeeeeeeeeeeeeeeeeeeenaeeeeeeeeeeeeeeeaaees 5 7 5 4 Housing amp Internal Parts Valor 2000 XW ceeeeeeeeeceeneee eter ee eeeeeeaeeeeeeeeeeeeeeeaaees 5 9 LIST OF ILLUSTRATIONS FIGURE NO TITLE 1 1 Front Display with controls Valor 4000 eie desi dance dwy yN Y FY YNYDAU 1 3 1 2 Back Display Valor E 1 4 1 3 Front Display with controls Valor 2000 1 6 1 4 Back Display
16. 0 load and 100 load for the capacity that the scale is rated for See Table 2 3 for values to use If the resulting readings are unstable the Main PC Board is defective 7 Use the Simulator to calibrate the scale in the next procedure to verify if the Main PC Board is good or bad Calibration Test This test calibrates the scale using the simulator and can verify that the Main PC Board is functioning properly or improperly 1 With the scale on enter the scale menu and perform a span calibration See Appendix A 2 Follow the scale prompts When the scale indicates a given weight to be placed on the scale set the simulator to an eguivalent value based on Table 2 3 3 Upon completion of calibration the PCB can be further checked using the Simulator to simulate various weight values If simulator settings and weight readings on the scale agree the PCB is functional If the scale readings vary or do not agree with readings in Table 2 3 the Main PC Board is defective and should be replaced See Chapter 3 Valor 2000 4000 Series Service Manual 2 5 Ohaus Corporation www ohaus com CHAPTER 2 DIAGNOSTIC GUIDE 2 2 4 Diagnostic Guide TABLE 2 4 DIAGNOSTIC GUIDE Symptom Possible Cause Remedy Cannot turn on No power to scale Battery discharged Verify connections power source and battery charge status Poor accuracy Improper calibration Unstable environment Perform calibration Move sc
17. 0 SP Power Adapter all plugs NA 30035630 Manual Instr JP V41 NA 30035631 Manual Instr RU V41 NA 30035624 Manual Instr KR V41 NA 30026168 Manual EN ES FR DE IT V41 NA 30035604 SP Packaging Box V22 V41 NA 30035605 SP Packaging complete V22PW V41PW Note For parts numbers see your local Ohaus distributor or visit www ohaus com Valor 2000 4000 Series Service Manual 5 3 Ohaus Corporation www ohaus com CHAPTER 5 PARTS LISTS amp DIAGRAMS 5 2 Valor 4000XW SCALES PARTS D 99997000 gh Figure 5 2 Valor 4000XW Scales Parts Ohaus Corporation www ohaus com 5 4 Valor 2000 4000 Series Service Manual CHAPTER 5 PARTS LISTS amp DIAGRAMS TABLE 5 2 Valor 4000XW SCALES PARTS Drawing Item Part Number Description 1 30035595 SP SST Pan V22PW V41P X W 2 30035592 SP Plastic Pan V22PW V41P X W 3 30043147 Overlay Back EN V41XW 30035633 Overlay Back JP V41XW 4 30035612 SP Housing Top No Labels V41XW 5 30035594 SP Spider V22PW V41P X W 6 30035600 SP Load Cell V41XWE1501T 30035601 SP Load Cell V41XWE3T 30035602 SP Load Cell V41XWE6T 30035603 SP Load Cell V41XWE15T 7 30035609 SP PCB Module V41P X W 8 30035614 SP Housing Bottom V41XW 9 72198198 SP Lead Acid Battery 6V 5AH 10 30035597 SP Battery Cover V22PW V41P X W 11 30035606 SP Feet Kit R21 R31 V71 V22 V41 12 30035634 SP Mech 4 Key Module V41P X W 13 3
18. 0028582 Function Label Front EN V41P X W 30035621 Function Label Front JP V41P X W 30035623 Function Label Front KR V41P X W 30035625 Function Label Front RU V41P X W 14 30035613 SP Front Module V41XW 15 30035598 SP Power Socket Kit V22PW V41P X W 16 30035611 SP Hardware Kit V22PW V41P X W 17 30035599 SP Level Bubble kit V22PW V41P X W NA 30035630 Manual Instr JP V41P X W NA 30035631 Manual Instr RU V41P X W NA 30035624 Manual Instr KR V41P X W NA 30026168 Manual EN ES FR DE IT V41P X W NA 46001802 SP Power Adapter body NA 46001780 SP Power Adapter all plugs NA 30035604 SP Packaging Box Carton V22PW V41P X W NA 30035605 SP Packaging complete V22PW V41PW Note For parts numbers see your local Ohaus distributor or visit www ohaus com Valor 2000 4000 Series Service Manual 5 5 Ohaus Corporation www ohaus com CHAPTER 5 PARTS LISTS amp DIAGRAMS 5 3 Valor 2000PW SCALES PARTS 99929 Figure 5 3 Valor 2000PW Scales Parts Ohaus Corporation www ohaus com 5 6 Valor 2000 4000 Series Service Manual CHAPTER 5 PARTS LISTS amp DIAGRAMS TABLE 5 3 Valor 2000PW SCALES PARTS Drawing Item Part Number Description 1 30035595 SP Pan SST V22 V41 2 30035592 SP Pan Plastic V22 V41 3 30035618 Overlay Back EN V22PW 30035610 Overlay Back JP V22PW 4 30035590 SP Housing Module Top V22PW V41PW 5 30035594 SP S
19. 1 1 Valor 4000 Front Display with controls TABLE 1 3 Control functions Valor 4000 Button Functions On Zero Short Press when on Sets display to zero off Long Press when off Turns scale on l when on Turns the scale off Yes Short Press in Menu Selects accepts displayed setting M Short Press Accumulates the weight or displays the Units accumulated information at 0 load Long Press Toggles through active Units Ma Short Press in Menu Toggles through available settings Function Short Press Initiates an application mode specific response Mode Long Press Selects active Mode R Short Press in Menu returns to previous settings ac Tare Short Press Enter clear a Tare value Menu Long Press Enters User Menu Se Short Press in Menu Quickly exit User Menu xit db IR Sensor can be programmed to act as touchless button See the User Menu section 4 3 for the available settings Notes 1 Short Press Press less than 2 5 seconds 2 Long Press Press and hold for more than 2 5 seconds 3 Press and hold the On Zero Off button until OFF is displayed then release the button 4 The IR sensor can be activated by a hand or other object that is placed at a specified height above the sensor location The sensor activation distance will vary based on the reflective nature of the object If unwanted activations occur due to unigue situations the sensor can be turned off V
20. 3 Valor 2000XW SCALES PARTS Drawing Item Part Number Description 1 30035595 SP Pan SST V22 V41 2 30035592 SP Pan Plastic V22 V41 3 30035619 Overlay rear V22XW 30035620 Overlay rear JP V22XW 4 30035612 SP Housing Top V22XW V41XW 5 30035594 SP Spider V22 V41 6 30035636 SP Load Cell V22 1 5kg 30035637 SP Load Cell V22 3kg 30035638 SP Load Cell V22 6kg 30035639 SP Load Cell V22 15kg 7 30035607 SP PCB Module V22 8 30035614 SP Housing Bottom V22XW V41XW 9 72198198 SP Lead Acid Battery 6V 5AH 10 30035597 SP Cover Batt V22 V41 11 30035606 SP Feet Kit R21 R31 V71 V22 V41 12 30035635 SP Mech 2 Key Module V22PW 13 30043179 Function Label Front EN V22 30035628 Function Label Front JP V22 30035627 Function Label Front KR V22 30035626 Function Label Front RU V22XW 14 30035613 SP Front Module V22XW V41XW 15 30035598 SP Power Socket Kit V22 V41 16 30035611 SP Hardware Kit V22 V41 17 30035599 SP Level Bubble kit V22 V41 NA 30035767 Manual EN ES FR DE IT V22 NA 30035593 Manual Instr JP V22 NA 30035615 Manual Instr RU V22 NA 30035616 Manual Instr KR V22 NA 30035604 SP Packaging Box Carton V22 V41 NA 30035605 SP Packaging complete V22PW V41PW NA 46001802 SP Power Adapter body NA 46001780 SP Power Adapter all plugs Note For parts numbers see your local Ohaus distributor or visit www ohaus com Valor 2000 4000 Series Service Manual
21. 800 526 0659 between 8 00 a m and 6 00 p m EST Valor 2000 4000 Series Service Manual 5 1 Ohaus Corporation www ohaus com CHAPTER 5 PARTS LISTS amp DIAGRAMS 5 1 Valor 4000PW SCALES PARTS gt TM get Figure 5 1 Valor 4000PW Scales Parts Ohaus Corporation www ohaus com 5 2 Valor 2000 4000 Series Service Manual CHAPTER 5 PARTS LISTS amp DIAGRAMS TABLE 5 1 Valor 4000PW SCALES PARTS Drawing Item Part Number Description 1 30035595 SP Pan SST V22 V41 2 30035592 SP Pan Plastic V22 V41 3 30028583 Overlay rear EN V41PW 3 30035622 Overlay rear JP V41PW 4 30035590 SP Housing Module Top V22PW V41PW 5 30035594 SP Spider V22 V41 6 30035600 SP Load Cell V41XWE1501T 6 30035601 SP Load Cell V41XWE8T 6 30035602 SP Load Cell V41 V41XWE6T 6 30035603 SP Load Cell V41XWE15T 7 30035609 SP PCB Module V41 8 30035591 SP Housing Bottom V22PW V41PW 9 72198198 SP Lead Acid Battery 6V 5AH 10 30035597 SP Cover Batt V22 V41 11 30035606 SP Feet Kit R21 R31 V71 V22 V41 12 30035634 SP Mech 4 Key Module V41 13 30028582 Function Label Front EN V41 13 30035621 Function Label Front JP V41 13 30035623 Function Label Front KR V41 13 30035625 Function Label Front RU V41 14 30035598 SP Power Socket Kit V22 V41 15 30035611 SP Hardware Kit V22 V41 16 30035599 SP Level Bubble kit V22 V41 NA 46001802 SP Power Adapter body NA 4600178
22. Valor 2000 ic itn ction she dw aia Gn ates cent cee eae cated 1 7 1 5 Menu Structor Valor 2000 en i eer aY dele acces FAU y FYD GE EL OFO 1 8 1 6 Sealing ec ee I GU CN A FU ONN FO OR GAN FY CON ae 1 9 2 1 Main Printed Curcuit Board aea en Tud Eege eegene 2 3 3 1 Screws securing Top HOUSING vest EE EeEESEANEN KENNEN ides A YNAD DRO e 3 2 3 2 Top and Bottom Boom eie eu iY DIG DOG DAR DOC IF 3 2 3 3 Main Printed Circuit Board 3 3 3 4 Bolts holding Frame to the Load Cell ENEE 3 4 3 5 CWeriaad Sion See cst se ee eege 3 5 3 6 Overload Gap Re ue ina ny eet cls cot chase haat deus dha a DS Gada NN RG 3 6 4 1 Scale drawing of Load Cell and Weighing Pan 4 6 5 1 Housing amp Internal Pare a A dn RF RF 5 2 Ohaus Corporation www ohaus com iii Valor 2000 4000 Series Service Manual CHAPTER 1 GETTING STARTED 1 1 INTRODUCTION This service manual contains the information needed to perform routine maintenance and service on the Ohaus Valor 2000 4000 Series scales Familiarity with the scale s Instruction Manual is assumed The contents of this manual are contained in five chapters Chapter 1 Getting Started Contains information on service facilities tools and test equipment specifications and the mechanical and electronic functions of the scale Chapter 2 Troubleshooting Contains a diagnostic guide and error code table Chapter 3 Maintenance Procedures Contains preventive maintenance procedures and disassembly repair a
23. al requirements are met To Lock or Unlock the scale s Legal For Trade LFT settings follow this procedure Caution When accessing the bottom of the scale avoid placing the scale upside down on the pan or sub platform Place the scale on its side 1 Turn the scale OFF 2 Remove the Security Cover under the scale to access the two pins located in a slot Short these pins a slotted screwdriver may be used while powering the scale ON The scale will perform the start up procedure and then the display will show the current status ler OFF LFT OFF unlocked or Lfe on LFT ON locked press the No key to change this setting or press the Yes key to confirm it Note When Legal For Trade is set to On the menu setting are affected as follows Calibration C A L menu is not accessible Unit menu is locked at the current setting Filter Menu is locked at current setting IR function menu is locked at current setting Stable Range setting is locked at 1d Auto Zero Tracking setting is locked at 0 5d 3 Replace the Security Cover 1 8 1 Physical Seals For jurisdictions that use the physical sealing method the local weights and measures official or authorized service agent must apply a security seal to prevent tampering with the settings Refer to the illustrations below for sealing methods Unlocked Locked Figure 1 6 Sealing Valor 2000 4000 Series Service Manual 1 9 Ohaus Corporation www ohaus com
24. ale to suitable location Cannot calibrate Unstable environment Incorrect calibration weight Move the scale to suitable location Use correct calibration weight Cannot access mode Mode not enabled Enter menu and enable mode Cannot access unit Unit not enabled Enter menu and enable unit LO rEF Reference weight is too low Increase reference weight Err 3 0 CAL Incorrect calibration weight See section 2 4 for correct weights Err HI Lond Power on zero range exceeded Clear pan Err H _LoRd Power on zero under range Install pan J R Load exceeds scale maximum Err 8 3 Led Overload capacity rn Undetiead ee below min range Re install Err B S EE Tare out of range Tare value exceeds maximum Err 9 GALA Internal data error Contact an authorized service agent Err 3 PEM Fail to write EEPROM Contact an authorized service agent Err 53 C 5u l Invalid checksum data Contact an authorized service agent Lo bRE Battery is discharged Connect the power and charge the battery DD BCE The current gross net value is not allowed to be accumulated Change the value to net gross value and then do the accumulation Battery fails to charge fully Battery is defective Have battery replaced by OHAUS authorized service dealer Ohaus Corporation www ohaus com 2 6 Valor 2000 4000 Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES
25. alor 2000 4000 Series Service Manual 1 3 Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED A SD DD PT LI LL LL LL LL L Lei g 24 LED Indicators IR Sensor back Figure 1 2 Valor 4000 Back Display 1 6 2 Power ON OFF To turn the scale on press and hold the On Zero Off button for 2 5 second The scale performs a display test momentarily displays the software version and then enters the active weighing mode To turn the scale off press and hold the On Zero Off button until OFF is displayed The scale can be used on AC power immediately Allow the battery to charge for 12 hours before using the scale on battery power The Scale will automatically switch to battery operation if there is a power failure or the power cord is removed With AC power the scale is constantly charging so the battery charge indicator will remain lit The scale can be operated during charging and the battery is protected against overcharging For maximum operating time the battery should be charged at room temperature During battery operation the battery symbol indicates the battery charge level remaining When charging the symbol will blink slowly and when fully charged the symbol will stop blinking TABLE 1 4 Symbol Charge Level SS Battery in use Symbol displayed Notes When battery symbol blinks fast approximately 30 minutes working time is left When Lo bRt is di
26. at and clip Strain Gauge Simulator arwns Valor 2000 4000 Series Service Manual 1 1 Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED 1 4 SPECIFICATIONS Valor 4000 Complete specifications for the Ohaus Valor 4000 scales are listed in Table 1 1 Whena scale has been serviced it must meet the specifications listed in the table Before servicing the scale determine what specifications are not met TABLE 1 1 SPECIFICATIONS Valor 4000 Model V41PWE1501T V41PWE3T V41PWE6T V41PWE15T V41XWE1501T V41XWE3T V41XWE6T V41XWE15T Capacity 1 5 kg 3 kg 6 kg 15 kg e g 05 1 2 5 d g 02 0 5 1 2 Resolution based on gram 7500 6000 6000 7500 Max Capacity Ib 3 6 15 30 Readability LFT OFF Ib 0 0005 0 001 0 002 0 005 Readability LFT ON Ib 0 001 0 002 0 005 0 01 Resolution LFT ON 3000 3000 3000 3000 Linearity error d or e 1 Repeatability d or e 1 1 1 1 Hysteresis d or e 1 1 1 1 Off Center Load d 1 ab Creep d or e 0 5e 0 15min 0 2e 15 10min Stabilization Time seconds 0 5 0 5 0 5 0 5 Operating Temperature 10 C to 40 C 10 C to 40 C 10 C to 40 C 10 C to 40 C Storage Temperature 20 C to 55 C 20 C to 55 C 20 C to 55 C 20 C to 55 C Pan Size 190 x 242 mm 190 x 242 mm 190 x 242 mm 190 x 242 mm 1 5 SPECIFICATIONS Valor 2000 Complete specifications for the Ohaus Valor 2000 scal
27. ct a mass weighing near the maximum capacity of the balance and place it on the center of the Pan Observe and record the reading 3 Remove the mass The reading should return to 0g 2 count 4 Repeat this test three times The reading should be within 2 count of the reading recorded If so the balance passes the Precision Test 5 If the deviation for any set of readings using the same mass placed on the center of the Pan is greater than 2 d the balance does not meet the precision specification Inspect and correct the following areas Check for mechanical obstructions Any foreign object touching any part of the moving assemblies will cause a balance to fail the Precision Test Inspect and correct as necessary Ifthe scale does not meet specifications move it to a suitable location ensure that it is level and try again If it still does not meet specifications perform a service calibration and try again See Appendix B for Service Calibration Ohaus Corporation www ohaus com 4 2 Valor 4000 Series Service Manual CHAPTER 4 TESTING 4 4 2 Repeatability Test Repeatability is the Standard Deviation of a set of similar weight readings Requirements To perform this test a single mass must be used for all readings The test mass should be approximately 1 2 of the capacity of the instrument Wear gloves when handling the mass Before starting a repeatability test set up the instrument as follow
28. e ee a a 4 1 AA Ge Le 4 2 AAW Ee RE 4 2 A Ae Repeatability Testun en dee egene Ee 4 3 AAD Linearity Test GO O SSES 4 5 4 4 4 Off Center Load Test rRiHuii ADEL FELT H YNN LYDD YC YNA FRYCH DYN DGC YNA steeneusysd cdhetsteneeees 4 5 4 4 5 Adjusting Off Center Loan EEN 4 6 CHAPTER 5 DRAWINGS AND PARTS LISTS 5 1 Valor 4000PW Scale Housing amp Internal Parts 5 2 5 2 Valor 4000XW Scale Housing amp Internal Parts 5 4 5 3 Valor 2000PW Scale Housing amp Internal Parts 5 6 5 4 Valor 2000XW Scale Housing amp Internal Parts 5 8 Appendix A STANDARD CALIBRATION LS WE ele E A 1 A 2 Setup and Calbranono EE UU i al Neate Moa Da eee ode A 2 Appendix B SERVICE CALIBRATION Bid Service Men Str CtUTE niini CA a via Y ni Cd Yy GE tease NW B 1 B 2 Entering the Service Menu 1 u ei iaeei diu Hi Adn LD FR e dE ENEE SEN B 1 B 3 Ramp Men ii aea Dyw eA E EA O teed SEN DYRY dee B 2 BA Service Linearity CGalbratton kk B 2 B 5 lt Service Span Calibratio E B 3 B 6 Gapacity Men EE B 3 B7 INA EE B 4 BR Expand Menter eege NEE deeg DA Be PSO IS PML as wk Aa eU da Na UI NR aw A MAN au NR RO Na B 4 B 10 End Menin te au a SN Eden B 4 LIST OF TABLES TABLE NO TITLE Page No 1 1 Specifications Valor 4000 iu ie das GYD ER ket DYWAL CCD Fd eae 1 2 1 2 Specifications Valor 2000 EE 1 2 1 3 Controls Functions V loen erugeet FO y FO 1 3 1 4 Battery Eeer 1 4 1 5 Menu SEH E dee de eae ih COG GN nA 1 5 1 6 Controls Functions Valor 200
29. epresent a flashing display flashes while the zero point is established The mid calibration point value flashes The kg LED is lit to indicate the calibration unit The example shows the mid calibration point value for a Scale Capacity of 3 kg Place the specified calibration weight on the pan and press Yes flashes while the mid point is established flashes while the full point is established If linearity calibration was successful the scale will exit the service menu and enter weighing mode The example shows a 3 kg span weight on the pan If linearity calibration was successful SPRR appears Press YES to enter the Service Span Calibration menu or or NO to advance to the next menu item Ohaus Corporation www ohaus com B 2 Valor 2000 4000 Series Service Manual APPENDIX B SERVICE CALIBRATION NOTE If calibration fails ensure that the test area is free from drafts and the surface the scale rests on is level and free of vibrations Then try to calibrate again If it continues to fail there may be an internal problem To resolve internal problems follow procedures in Chapter 3 B 5 Service Span Calibration When SPAR appears press YES to accept the Service Span Calibration menu or No to advance to the Service Linearity Calibration menu 0 flashes With no weight on the pan press Yes to establish the zero IN point Outlined characters represent a flashing display
30. es Service Manual A 1 Ohaus Corporation www ohaus com APPENDIX A STANDARD CALIBRATION A2 SETUP AND CALIBRATION Note Be sure units are set to kg before starting calibration 1 Turn on the scale Press and hold Menu CAL on Valor 2000 until MENU Menu is displayed When the button is released the display Cp will show E A t i 2 Press Yes to accept SPAR will then be shown Press Yes to begin the SPAY span calibration 8 kg will be displayed n Li 3 Press Yes to accept C will be displayed while zero reading is f stored Next the display shows the calibration weight value e g 3 a a 4 Place the specified calibration mass on the pan Press Yes to accept the weight or No to select an alternate weight C will be displayed while the reading is stored 5 The display will show den if the calibration was successful The scale returns to the previous application mode and is ready for use D D Fw Ohaus Corporation www ohaus com A 2 Valor 2000 4000 Series Service Manual APPENDIX B SERVICE CALIBRATION APPENDIX B SERVICE CALIBRATION This section describes the Service Menu and sub menus which allow authorized service personnel to perform factory Linearity and Span calibrations no pre set limits The service menu is not accessible if LFT mode is enabled CAUTION Be careful not to touch the scale or the surface it rests on while calibration is in progress as it will cause
31. es are listed in Table 1 2 Whena scale has been serviced it must meet the specifications listed in the table Before servicing the scale determine what specifications are not met TABLE 1 2 SPECIFICATIONS Valor 2000 Model V22PWE1501T V22PWE3T V22PWE6T V22PWE15T V22XWE1501T V22XWE3T V22XWE6T V22XWE15T Capacity 1 5 kg 3 kg 6 kg 15 kg e g 0 5 1 2 5 d g 02 0 5 1 2 Resolution based on gram 7500 6000 6000 7500 Linearity error d or e 1 1 1 1 Repeatability d or e 1 1 1 1 Hysteresis d or e 1 1 1 1 Off Center Load d 1 t t Creep d or e 0 5e 0 15min 0 2e 15 10min Stabilization Time seconds 0 5 0 5 0 5 0 5 Operating Temperature 10 C to 40 C 10 C to 40 C 10 C to 40 C 10 C to 40 C Storage Temperature 20 C to 55 C 20 C to 55 C 20 C to 55 C 20 C to 55 C Pan Size 190 x 242 mm 190 x 242 mm 190 x 242 mm 190 x 242 mm Ohaus Corporation www ohaus com 1 2 Valor 2000 4000 Series Service Manual CHAPTER 1 GETTING STARTED 1 6 SCALE OPERATION VALOR 4000 This section contains information on the basic operation of the Valor 4000 scale 1 6 1 OVERVIEW OF THE CONTROLS OO AN L LO O pes a TULOOOU UE lt v Po On Zero M Function Tare la N Off Units Mode Menu Ve J T T Callbration Menu Mode VALOR 4000W T T Yes No Back Exit Figure
32. for Valor 7000 TABLE 2 2 COLOR CODE FOR LOAD CELL WIRING EXE EXE SIG SIG AMI BLACK GREEN WHITE RED ZEMIC BLACK RED GREEN WHITE Color codes may vary Insert the Platform Support into the Load Cell Frame place the Platform on top and turn on power to the scale Using a voltmeter measure and record the excitation voltage supplied to the PCB with no load on the Platform measure the voltage across points 4 and 1 of Load Cell connection on the PCB EXE and EXE This voltage must be approximately 4 6 4 7 Volts dc with the Load cell connected If the voltage is lower disconnect the Load Cell cable from the PCB and measure again If the voltage is not 4 6 4 7 Volts dc the Load Cell is defective and must be replaced If the voltage remains low the PCB is defective and must be replaced Ohaus Corporation www ohaus com 2 2 Valor 2000 4000 Series Service Manual CHAPTER 2 DIAGNOSTIC GUIDE CAUTION N IN THE NEXT STEP DO NOT OVERLOAD THE SCALE BEYOND FULL CAPACITY RATING Measure the voltages on SIG and SIG wires disconnected from PCB Note Measurements must be made with these wires disconnected from the PCB These measurements represent the output of the Load Cell Record measurements at Zero Load 50 and full scale capacities See Table 2 3 for typical readings Figure 2 1 Top view of main PCB NOTE Table 2 3 indicates typical readings Actual values ca
33. g Move the weight to point C and record the reading Move the weight to point D and record the reading If the reading at point A is negative file at points 1 and 4 AT AN ANGLE If the reading at point B is negative file at points 1 and 2 STRAIGHT ACROSS oO oN AU BO ND If the reading at point C is negative file at points 2 and 3 AT AN ANGLE 10 If the reading at point D is negative file at points 3 and 4 STRAIGHT ACROSS N Note It is not recommended that you try to adjust more than 5 counts if the beam has been filed already If the beam has not been filed previously you can adjust 10 counts Remember when filing you are weakening the beam File a little at a time Ohaus Corporation www ohaus com 4 6 Valor 4000 Series Service Manual CHAPTER 5 PARTS LISTS amp DIAGRAMS This section of the manual contains exploded views of the Valor 2000 4000 scale The exploded view drawings are designed to identify the parts which can be serviced on the scale in the field NOTE In all cases where a part is replaced the scale must be thoroughly checked after the replacement is made The scale MUST meet the parameters of all applicable specifications in this manual If further technical information is needed please contact your local Ohaus distributor or www ohaus com Ohaus Corporation 7 Campus Drive Suite 310 Parsippany NJ 07054 USA Tel 973 377 9000 Fax 973 593 0359 In the United States call toll free
34. he Valor 2000 4000 are designed to be replaced rather than repaired This includes the Main Printed Circuit Board PCB and Switches PCB the Load Cell and the cables For an illustrated list of replaceable parts see Chapter 5 3 3 OPENING THE SCALE Use these procedures in order to replace the Load Cell any of the Printed Circuit Boards and or LCD Displays Valor 2000 4000 Series Service Manual 3 1 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE PROCEDURES 3 3 1 Separating the Top and Bottom Housings Common hand tools are sufficient to disassemble the Valor 2000 4000 scales Turn the scale off and unplug the power cord before you begin 1 o oN OP a FF O ND Turn the scale over Remove the 4 screws of battery cover Take away the battery cover Disconnect the battery Remove the battery Remove the 2 screws of pan and take away the pan Remove the LFT cover screws Take away the LFT cover Remove the 5 screws Figure 3 1 Screws that secure the housing 10 Turn the scale over and move the top housing a little bit 11 backward and then raise and remove the top housing Separate Top Housing from Bottom Housing Avoid straining the cables that connect the Main PCB to the parts in the Bottom Housing Lay the two housings close to each other so cable is not strained Ohaus Corporation www ohaus com 3 2 Valor 2000 4000 Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES
35. n vary but should remain linear throughout the range If readings are out of tolerance replace the Load cell See Section 3 6 TABLE 2 3 LOAD CELL OUTPUT READINGS in mV V with 4 65 V Excitation V41xWE1501T 1 5kg 0 739 1 489 2 239 V22xWE1501T 1 5kg V41xWE3T 3kg 0 4434 1 3434 2 2434 V22xWEST 3kg V41xWE6T 6kg 0 2217 1 1217 2 0217 V22xWE6T 6kg V41xWE15ST 15kg 0 11085 1 23585 2 36085 V22xWE15T 15kg Valor 2000 4000 Series Service Manual 2 3 Ohaus Corporation www ohaus com CHAPTER 2 DIAGNOSTIC GUIDE 2 2 3 Testing the Printed Circuit Board PCB The PCB can be tested by measuring voltages and by using a simulator The simulator replaces the Load Cell during testing and is a useful tool for diagnosing problems PCB Voltage Measurements Note Prior to the voltage measurements the battery should be fully charged and tested 1 Disconnect power from the scale and remove the Top housing See Section 3 3 1 N CAUTION Disconnect the power from the scale before opening the housing 2 Connect the AC Adapter to the scale and turn the scale on 3 Using a DVM measure the excitation voltage EXE and EXE in Figure 2 1 The reading should be 4 6 4 7 volts dc This is the excitation voltage for the Load Cell and is regulated If the voltage is lower replace the PCB See Section 3 4 Then perform Operational Tests See Chapter 4 4 Measure incoming power from the transformer
36. nd replacement procedures Chapter 4 Testing Contains a list of required test masses an operational test segment display test performance tests and adjustments Chapter 5 Drawings and Parts Lists Contains exploded views of Valor 2000 4000 scales identifying all serviceable components Appendix A Standard Calibration Explains procedures for Standard Calibration performed prior to using a scale and after service Appendix B Service Calibration Describes the Service Menu and sub menus which allow authorized service personnel to perform factory Linearity and Span calibrations no pre set limits take Ramp readings and to set the service menu units 1 2 SERVICE FACILITIES To service a scale the service area should meet the following requirements e Should be temperature controlled and meet scale specifications for temperature environmental requirements e Must be free of vibrations such as fork lift trucks close by large motors air currents or drafts from air conditioning heating ducts open windows people walking by fans etc Area must be clean and free of excessive dust Work surface must be stable and level Scale must not be exposed to direct sunlight or radiating heat sources Use an approved Electro Static Device 1 3 TOOLS AND TEST EQUIPMENT REQUIRED The service shop should contain the following equipment Standard hand tools Digital Voltmeter DVM Standard Electronics tool kit Grounding m
37. pider V22 V41 6 30035636 SP Load Cell V22PWE1501T V22PWE1501TZH 30035637 SP Load Cell V22PWE8T V22PWE3TZH 30035638 SP Load Cell V22PWE6T V22PWE6TZH 30035639 SP Load Cell V22PWE15T V22PWE15TZH 7 30035607 SP PCB Module V22 8 30035591 SP Housing Bottom V22PW V41PW 9 72198198 SP Lead Acid Battery 6V 5AH 10 30035597 SP Cover Batt V22 V41 11 30035606 SP Feet Kit R21 R31 V71 V22 V41 12 30035635 SP Mech 2 Key Module V22 13 30035617 Function Label Front V22PW Chinese 30043179 Function Label Front V22 English 30035627 Function Label Front V22 Korea 30035628 Function Label Front V22 Japan 14 30035598 SP Power Socket Kit V22 V41 15 30035611 SP Hardware Kit V22 V41 16 30035599 SP Level Bubble kit V22 V41 NA 30035767 Manual EN ES FR DE IT V22 NA 30035629 Manual Instr CN V22PW NA 30035593 Manual Instr JP V22 NA 30035615 Manual Instr RU V22 NA 30035616 Manual Instr KR V22 NA 30035604 SP Packaging Box Carton V22 V41 NA 30035605 SP Packaging complete V22PW V41PW NA 46001802 SP Power Adapter body NA 46001780 SP Power Adapter all plugs Note For parts numbers see your local Ohaus distributor or visit www ohaus com Valor 2000 4000 Series Service Manual 5 7 Ohaus Corporation www ohaus com CHAPTER 5 PARTS LISTS amp DIAGRAMS 5 4 Valor 2000XW SCALES PARTS Figure 5 3 Valor 2000XW Scales Parts Ohaus Corporation www ohaus com 5 8 Valor 2000 4000 Series Service Manual CHAPTER 5 PARTS LISTS amp DIAGRAMS TABLE 5
38. posts and lift out the battery 3 Position the replacement battery in the compartment on an angle sufficient to access the battery posts Make sure that the red harness connect to the red post and black harness connect to the black post 4 Insert the quick connect tabs on their respective posts and place the battery fully in the battery compartment 3 8 Replacing the Function Label The Function Label may need to be replaced See Chapter 5 for parts information Use a broad knife to remove the label Clean the glue residue from the Housing surface Then carefully place the new label where the old one was Valor 2000 4000 Series Service Manual 3 7 Ohaus Corporation www ohaus com CHAPTER 4 TESTING 4 1 TESTING Before and after servicing a Valor 2000 4000 scale an operational test and various performance tests should be made to confirm that the scale meets specifications Turn the scale on and allow it to warm up for at least one hour before performing these tests NOTE N Make sure the test area is free from drafts and that the scale rests on a level and vibration free surface 4 1 1 TEST MASSES REQUIRED The masses required to test the Ohaus Valor 2000 4000 scales must meet the requirements of ASTM Class 4 or OIML F2 Tolerance The mass values are listed in Table 4 1 TABLE 4 1 TEST MASS VALUES Model Weight g V41xWE1501T 1kg 500g 200g V21xWE1501T V41xWE3T 1kg 500g V21xWE3T V41xWE6T 2kg
39. rized Ohaus service dealer Risk of explosion can occur if the rechargeable battery is replaced with the wrong type or if it is not properly connected Dispose of the lead acid battery according to local laws and regulations Valor 2000 4000 Series Service Manual 1 7 Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED 1 7 3 Menu Setup Programmable features of the Valor 2000 scales are contained in menus which are accessed through the Display Panel s control switches See the Instruction Manual for a full description of the menus and how to access them Ca Span GEO End Figure 1 5 Menu structure 1 7 4 Menu Navigation To enter the calibration menu press and hold the Cal button for 5 seconds SpaN will then be displayed Press Zero key to perform span calibration or press Cal key to proceed to GEO settings Press Zero key to enter GEO settings and then press Cal key to increase the value Press Zero key to confirm end will be displayed Press Zero key to exit the menu and return to weighing mode Ohaus Corporation www ohaus com 1 8 Valor 2000 4000 Series Service Manual CHAPTER 1 GETTING STARTED 1 8 LEGAL FOR TRADE Note This section applies to Valor 4000 only When the scale is used in trade or a legally controlled application it must be set up verified and sealed in accordance with local weights and measures regulations It is the responsibility of the purchaser to ensure that all pertinent leg
40. s Set Up Follow the steps in Appendix A Section A 2 Setup and Calibration Record Settings Zero Tracking Setting Displayed Units Mass Used TEST PROCEDURE 1 Zero the instrument if it does not read zero 2 Using a test mass approximately half the capacity of the instrument place the mass on the center of platform Record the reading on the worksheet provided Remove the mass from the platform Repeat this test starting at Step 1 until you record a total of ten readings Fill in the worksheet Table 4 2 with the ten 10 readings Valor 4000 Series Service Manual 4 3 Ohaus Corporation www ohaus com CHAPTER 4 TESTING TABLE 4 2 REPEATABILITY WORKSHEET n Reading Delta Reading Mean Delta x Delta 1 2 3 4 5 6 7 8 9 10 n number of Reading Mean Sum of readings 10 Delta Reading Mean Standard Deviation Square Root of sum of Delta x Delta 9 5 Add the ten readings and divide the total by 10 to find the Mean average Mean Reading 1 Reading 2 Reading 3 Reading 4 Reading 5 Reading 6 Reading 7 Reading 8 Reading 9 Reading 10 10 Mean 6 Calculate the Delta for each reading and record in the work sheet Delta Reading Mean Calculate the Delta x Delta for each reading and record in worksheet 8 Add the ten Delta x Delta values and divide by 9 Calculate the Standard Deviation by
41. splayed the scale will shut off Charging the scale must be performed in a dry environment CAUTION Battery is to be replaced only by an authorized Ohaus service dealer Risk of explosion can occur if the rechargeable battery is replaced with the wrong type or if it is not properly connected Dispose of the lead acid battery according to local laws and regulations Ohaus Corporation www ohaus com 1 4 Valor 2000 4000 Series Service Manual CHAPTER 1 GETTING STARTED 1 6 3 Menu Setup Programmable features of the Valor 4000 scales are contained in menus which are accessed through the Display Panel s control switches See the Instruction Manual for a full description of the menus and how to access them TABLE 1 5 Valor 4000 MENU STRUCTURE Menu C A L S E t U P r E A d M O d E U n it L O C k End Span Reset Reset Reset kg Reset Lin Pwr Un Stable Percnt g L Cal Menu GEO A Tare Filter Check oz L Setup ltems End Ir Func AZT End lb L Read Ir Adj Light lb oz L Mode Accum Sleep End L Unit End A Off End End 1 6 4 Menu Navigation Press and hold Menu until MENY Menu is displayed When released the first sub menu R L Cal will be shown Press Yes to enter the displayed sub menu or press No to advance to the next Selecting a sub menu will display the first menu item Press Yes to view the menu item setting or press No to move to the next menu item When viewing the setting pre
42. ss Yes to accept the setting or press No to change the setting When End is displayed press Yes to return to the sub menu selections or No to return to the first item in the current menu Bold indicates factory default setting Valor 2000 4000 Series Service Manual 1 5 Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED 1 7 SCALE OPERATION VALOR 2000 This section contains information on the basic operation of the Valor 2000 scale 1 7 1 OVERVIEW OF THE CONTROLS NET GD noi VOC US OHAUS an o an o an o an o an o an b 0Z v v v v v U VALOR zccow On Zero Tare O Off Cal Figure 1 3 Valor 2000 Front Display with controls TABLE 1 6 Control functions Valor 2000 Button Functions o Short Press when on Sets display to zero n Zero 2 Long Press when off Turns scale on when on Turns the scale off Short Press in Menu Selects accepts displayed setting Short Press Enter clear a Tare value Cal Long Press Initiates Calibration procedure Short Press in Menu Toggles through available settings Extended Press Enters user menu Notes 1Short Press Press less than 2 5 seconds Long Press Press and hold for more than 2 5 seconds 3 Extended Press Press and hold for more than 5 seconds Ohaus Corporation www ohaus com 1 6 Valor 2000 4000 Series Service Manual CHAPTER 1 GETTING STARTED
43. stance Test to determine if the Load Cell is severely damaged or a short circuit to the frame has occurred Note The Load Cell must be completely disconnected from the Printed Circuit Board and at no load when the resistance readings are taken Using an ohm meter measure and record resistance between each pair of wires from the Load Cell as specified in Table 2 1 Compare the measured readings with the specified values in Table 2 1 If the resistance readings are in the range specified skip to the next section If they are outside the expected range open circuit or short circuit across any two wires the Load Cell is defective replace it See Chapter 3 TABLE 2 1 LOAD CELL RESISTANCE READINGS in Ohms Model Ex to Ex S to S Ex to S Ex to S Ex to S Ex to S All models 404 10 35024 289410 289410 289 10 289 10 Perform an Output Voltage Test Measure the no load 50 load and full load output The reading should meet the Load Cell specifications The Load Cell output should be very close to linear over its capacity range NOTE The following steps involve power applied to the scale Load Cell solder contacts can be used as measuring points See Figure 2 1 The EXE and EXE wires should be connected to the PCB and the SIG and SIG wires must be disconnected Record the colors for each wire connection before disconnecting See Table 2 2 for typical color code
44. the process to fail B 1 Service Menu Structure Ramp Lin Span Cap DivS S Unit Expand Reset End B 2 Entering the Service Menu Turn the scale off Press and hold the On Zero and Tare keys simultaneously for 8 seconds until r APP is displayed Valor 2000 4000 Series Service Manual B 1 Ohaus Corporation www ohaus com APPENDIX B SERVICE CALIBRATION B 3 Ramp Menu When AMF appears press YES to accept the Ramp menu or No to advance to the Expand menu item The Ramp value is displayed as a percent of the A D range Press YES to advance to the Service Linearity Calibration menu item Note Ramp is used to troubleshoot load cell problems 0 represents no signal from the A D 100 reflects the upper signal range of the A D B 4 Service Linearity Calibration This calibration method uses three points The full calibration point is established with a weight on the scale The mid calibration point is established with a weight equal to half of the full calibration weight on the scale The zero calibration point is established with no weight on the scale The mid calibration points cannot be altered by the user during the calibration procedure When t i appears press YES to accept the Service Linearity Calibration menu or No to advance to the Ramp menu item 0 flashes The kg LED is lit to indicate the calibration unit With no weight on the pan press Yes to establish the zero point Outlined characters r
45. the specification in Table 3 2 The gap can be tested by applying 100 load one corner at a time at each corner stop If the gap is right the Load Cell Frame will just touch the Overload Stop Nut Overload Stops N Note Be careful not to overload the Load Cell which would damage it 2 Repeat this for all four corners Figure 3 5 Overload Stops 3 Test the scale to see if full capacity can be achieved Valor 2000 4000 Series Service Manual 3 5 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE PROCEDURES TABLE 3 2 VALOR 2000 4000 OVERLOAD STOP GAP SETTINGS Model Max Capacity Overload Stop Gap Scale Load Cell A B mm C D mm V41xWE1501T 1 5kg 3kg 1 1 0 9 V22xWE1501T V41xWE3T 3kg 5kg 1 2 0 8 V22xWE8T V41xWE6T 6kg 10kg 1 0 7 V22xWE6T V41xWE15T 15kg 20kg 1 0 7 V22xWE15T Figure 3 6 Gap position of corners A B C D A amp B represent the front of the scale Ohaus Corporation www ohaus com 3 6 Valor 2000 4000 Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES 3 7 Removing Replacing the Rechargeable Battery The Valor 2000 4000 has a rechargeable battery If it fails to recharge replace it as follows 1 Lift the battery s front end enough to access the quick connect tabs holding the wire leads ee N Note Be careful not to short Ss circuit the battery leads e wh 2 Pull the quick connect tabs free of the battery
Download Pdf Manuals
Related Search