service manual
Contents
1. 5 4 C 1 RS232 Interface connected to Service Interface connected to the PCB C 1 C 2 Service Interface fits into the RS232 C 1 C 3 Com Port Configuration screen with correct 5 C 2 C 4 Config Tool s Test Command C 2 5 The Config Tools Configuration Green 3 Ohaus Corporation www ohaus com iii Valor 3000 Series Service Manual TABLE OF CONTENTS Valor 3000 Series Service Manual iv Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED 1 1 INTRODUCTION This service manual contains the information needed to perform routine maintenance and service on the Ohaus Valor 3000 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 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 and replacement procedures Chapter 4 Testing Contains a list of required test masses an operational test segment display test performance tests and adjustments Chapter 5 Drawing2. 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 3000 Series Service Manual CHAPTER 5 PARTS LISTS amp DIAGRAMS This section of the manual contains exploded views for the Valor 3000 series scales 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 Ohaus Corporation www ohaus com 19A Chapin Road P O Box 2033 Pine Brook NJ 07058 2033 USA Tel 973 377 9000 Fax 973 593 0359 In the United States call toll free 800 526 0659 between 8 00 a m and 6 00 p m EST Valor 3000 Series Service Manual 5 1 Ohaus Corporation www ohaus com CHAPTER 5 PARTS LISTS amp DIAGRAMS 5 1 VALOR 3000 XTREME SCALES HOUSING amp INTERNAL PARTS Figure 5 1 Valor 3000 Xtreme Scales Housing amp Internal Parts Ohaus Corporation www ohaus com 5 2 Valor 3000 Series Service Ma
3. OHAUS SERVICE MANUAL Valor 3000 SCALES Ohaus Corporation 19A Chapin Road P O Box 2033 Pine Brook NJ 07058 2033 973 377 9000 OHAUS SERVICE MANUAL Valor 3000 SCALES 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 Copyright 2009 Ohaus Corporation all rights reserved TM Registered trademark of Ohaus Corporation TABLE OF CONTENTS Page No CHAPTER 1 GETTING STARTED 1 519 a A whe Sp ade Dea iata a a 1 1 1 2 Service Facilities x otto et ool es en DR 1 1 1 3 10019 and Test Equipment Required nce rore oma ein 1 1 UE EE EE 1 2 1 55 Scale EES a E DEL Gary 1 4 1 5 1 Overview of the Gontrols nu een 1 4 1 5 2 Overview of the Display Indicator oi aere nee He ee 1 5 1 5 3 a SR UN LE HER 1 5 12544 Power EE 1 5 1 5 5 6 1 5 1 6 egal For Trade DET uode eet odio Cea te vem ex aa Cerdo oe odiado las 1 6 Setup PIOCBOUEO rare 1 6 572 Menu eta at Diet Oa een ee 1 7 CHAPTER 2 TROUBLESHOOTING 723 4 elio cinesi qo eer D REN 2 1 2 2 Diagnostic Olde en akku 2 1 2 2 1 DION pe eek 2 1 CHAPTER 3 MAI
4. 95232 Menu Related Bandrate 2400 SerEnable Parity 7 Even S Auto Print Off Print Stable 4 Handshake None A Serial Number E Scale Loadcell DK A 00 37 1596 C 5 Model SP601 Reset Read Update Figure C 6 The Config Tool s Configuration Screen E SN 7122170454 3 If the Load Cell was replaced follow the same procedure as above but enter the Load Cell serial number and click Load Cell B in the Serial Number box 4 The bar G is a graphical measure of the Load Cell output currently being used 5 Turn the scale off perform a Service Calibration see Appendix B followed by Operational and Performance tests Chapter 4 Ohaus Corporation www ohaus com C 4 Valor 3000 Series Service Manual APPENDIX D GEOGRAPHICAL ADJUSTMENT VALUES APPENDIX D GEOGRAPHICAL ADJUSTMENT VALUES TABLE D 1 GEOGRAPHICAL ADJUSTMENT VALUES Elevation above sea level in meters Geographical O 325 650 975 1300 1625 1950 2275 2600 2925 3250 latitude away 325 650 975 1300 1625 1950 2275 2600 2925 3250 3575 from the equator North Elevation above sea level in feet or South in degrees and O 1060 2130 3200 4260 5330 6400 7460 8530 9600 10660 minutes 1060 2130 3200 4260 5330 6400 7460 8530 9600 10660 11730 0 00 5 46 5 4 4 3 3 2 2 1 1 0 0 5 46 9952 5 5
5. IP65 Pan Size mm in 120 4 7 146 158 5 7 x 6 2 Net Weight kg Ib 1 2 2 6 1 3 2 9 1 4 3 1 Welgnt 2 6 5 7 2 7 6 2 8 6 2 Models V31X3N and V31X6N are not rated IP65 Ohaus Corporation www ohaus com Valor 3000 Series Service Manual CHAPTER 1 GETTING STARTED 1 4 SPECIFICATIONS TABLE 1 2 CAPACITY AND READABILITY Non Washable Models Washable Models VBD cd 300 0x 1 6000x2 0 2 200 00 x 2000 0x 300 0 x 3000 0 x 0 3000 3 000 x 6 000 x 0 0002 0 001 0 002 0 20000 x 2 0000 x 3 000 x 6 000 x 0 3000 x 3 0000 x 6 000 x 0 00001 0 0001 0 001 0 001 0 0001 0 0005 0 001 10 58 x 105 80 x 0 01 0 05 7 0550 x 70 550x 105 80x 211 65x 10 585 x 105 80 x 211 60 x 0 0005 0 005 0 05 0 05 0 005 0 02 0 05 0 6615 x 6 615 13 225 x 0 44090 x 4 4090 x 6 615 13 230 x OFF 0 6615 x 6 615 x 13 225 x 0 00005 0 0005 0 005 0 005 0 0005 0 002 0 005 6 lb 9 80 131b 3 6 NA NA NA NA ON NA oz x 0 05 oz x 0 1 02 02 0 02 6 Ib 9 80 OFF NA OZ X 2 02 1014 05 105 ne Zu oz 1 8 1 i 1 fra 7 x 1 8 70 ozx 105 oz 211 oz OFF E d 105202 211 0zx 1 8 x 1 8 x 1 8 x 1 8 1 8 610 9 13 Ib OZ X 312 oz x 10 02 1 802 1 8027 fra 4lb 6 Y i 02 x 18 a oz x 1 80z 10 14 x 101 45 x 202 9 x 0 01 0 05 0 1 6 7630 x 67 630x 101 45x 202 90x 10 140 x 101 44 x 202 90 x 0 0005 0 005 0 05 0 05 0 005 0 02 0 05 Valor 3000 Series Service Manual 1 3 Ohaus Corporati
6. well as the specifications listed in Table 4 1 Before proceeding with the following tests the scale should be calibrated See Appendix A 4 5 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 Tolerance Table 4 2 1 2 Power on the balance The reading on the display should be 0g Select a mass weighing near the maximum capacity of the balance and place it on the center of the Pan Observe and record the reading Remove the mass The reading should return to 0g the tolerance in Table 4 2 Repeat this test three times The readings should be within tolerances If so the balance passes the Precision Test If the deviation for any set of readings using the same mass placed on the center of the Pan is greater than the tolerance listed in Table 4 2 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 If the 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 Ifthe scale does not pass this test t
7. 146mm x 158mm 2 Pan Support Square 3 Load Cell Seal Kit IP Models 4 Function Label Level 5 Housing Top IP Models No Labels 6 Load Cell 6000g 7 Housing Bottom 8 Seal Kit Housing 10 Housing Bottom Plate LFT 11 Feet 4 Adjustable 12 Battery Cover Seal and Screws 13 PCB Main OIML 14 LCD with Backlight 15 Seal AC Adapter 16 Hardware Kit 17 Seal Kit LFT 18 Level Bubble 80 Adapter US 120V Valor 3000 Series Service Manual 5 5 Ohaus Corporation www ohaus com CHAPTER 5 PARTS LISTS amp DIAGRAMS Ohaus Corporation www ohaus com 5 6 Valor 3000 Series Service Manual APPENDIX A STANDARD CALIBRATION APPENDIX A STANDARD CALIBRATION A 1 CALIBRATION Note This menu is locked out in Legal For Trade applications To regain access see Section 1 6 Standard calibration should be performed prior to using a scale and after service See Section 4 2 for Calibration Masses required for each model Note A Be careful not to touch the scale or the table while calibration is in progress as it will cause the process to fail 1 Press and hold the ENTER Cal button rto until C A L appears MIC 2 Press Yes CAL appears followed by a flashing C while a zero reading is stored 7 27 3 The specified calibration weight value appears Place the weight on the pan 1 The display shows C while the N 11434 reading is stored po di sas 4 When calibration is complete the E display
8. 4 4 3 3 2 2 1 1 0 9 52 12 44 6 5 5 4 4 3 3 2 2 1 1 12244 15 06 6 6 5 5 4 4 3 3 2 2 1 15 06 17210 7 6 6 5 5 4 4 3 3 2 2 17 10 19202 7 7 6 6 5 5 4 4 3 3 2 19 02 20745 8 7 7 6 6 5 5 4 4 3 3 20 45 22 22 8 8 7 7 6 6 5 5 4 4 3 22 22 23954 9 8 8 7 7 6 6 5 5 4 4 23 54 25921 9 9 8 8 7 7 6 6 5 5 4 25 21 26 45 10 9 9 8 8 7 7 6 6 5 5 26 45 28 06 10 10 9 9 8 8 7 7 6 6 5 28 06 29925 11 10 10 9 9 8 8 7 7 6 6 29 25 30241 11 11 10 10 9 9 8 8 7 7 6 30 41 31 56 12 11 11 10 10 9 9 8 8 7 7 31 56 33 09 12 12 11 11 10 10 9 9 8 8 7 33 09 34 21 13 12 12 11 11 10 10 9 9 8 8 34 21 35931 13 13 12 12 11 11 10 10 9 9 8 35 31 36741 14 13 13 12 12 11 11 10 10 9 9 36 41 37 50 14 14 13 13 12 12 11 11 10 10 9 37 50 38 58 15 14 14 13 13 12 12 11 11 10 10 38 58 40 05 15 15 14 14 13 13 12 12 11 11 10 40 05 41 12 16 15 15 14 14 13 13 12 12 11 11 41 12 42 19 16 16 15 15 14 14 13 13 12 12 11 42 19 43 26 17 16 16 15 15 14 14 13 13 12 12 43 26 44232 17 17 16 16 15 15 14 14 13 13 12 44932 45938 18 17 17 16 16 15 15 14 14 13 13 45938 46245 18 18 17 17 16 16 15 15 14 14 13 46 45 47951 19 18 18 17 17 16 16 15 15 14 14 47 51 48 58 19 19 18 18 17 17 16 16 15 15 14 48 58 50 06 20 19 19 18 18 17 17 16 16 15 15 50 06 51213 20 20 19 19 18 18 17 17 16 16 15 51 13 52 22 21 20 20 19 19 18 18 17 17 16 16 52 22 53931 21 21 20 20 19 1
9. C 1 Hardware and Software Setup continued 9 Click the Test Command tab to test the communications See Figure C 4 fe ConfigTool 80252509A Config Test Command COM pott Type Command E Reset Scale Clear H Response From Scale lm Ld H Figure C 5 Config Tools Test Command screen Enter a P command The scale should respond with a weight value e g 0 029 Enter a V command The response should be the software version e g Sr 1 03 Valor 3000 Series Service Manual C 3 Ohaus Corporation www ohaus com APPENDIX C SOFTWARE SERVICE TOOL INSTRUCTIONS C 2 Configuring the Scale after replacing the PCB or Load Cell 1 When communications are reliable return to the Config tab Press the Read button E and the data will be read from the scale 2 If the PC Board has been replaced the scale needs to be configured To configure the scale enter its serial number in the blank C then click Scale in the Serial Number box A and click OK D When the OK button highlights again click Update F Turn the scale off and then back on to save the data Config Test Command COM port E User Enable Unit P Oz 0 M Dw Mlb MP Custom quotiety Unit T select User Menu Related Sample size 10 pcs Auto Off Power On Unit a AZT 05d La Le Mode Off H Stability 1d La
10. may need to be replaced See Chapter 5 for parts information Use a broad blade such as a wide X Acto knife to remove the label Clean the glue residue from the Housing surface Then carefully place the new label where the old one was See Figure 3 8 Function Label Plastic Insert Figure 3 8 Plastic Insert and Function Label 3 7 Replacing the Plastic Insert The Plastic Insert also may need to be replaced See Chapter 5 for parts information Break the tabs off the inside of the Plastic Insert to remove it Then place the new Insert where the old one was See Figure 3 9 Tabs on Plastic Insert Figure 3 9 Plastic Insert viewed from inside Top Housing Ohaus Corporation www ohaus com 3 6 Valor 3000 Series Service Manual CHAPTER 4 TESTING 4 4 TESTING Before and after servicing a Valor 3000 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 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 3000 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 CALIBRATION MASS VALUES MODELS V31XH202 V31XH2 V31X3 V3
11. scale components and operation 2 2 4 Diagnosis 1 Isolate and identify the symptom 2 Referto Table 2 1 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 scale 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 3000 Series Service Manual 2 1 Ohaus Corporation www ohaus com CHAPTER 2 DIAGNOSTIC GUIDE 2 2 4 Diagnosis TABLE 2 1 DIAGNOSTIC GUIDE Symptom Possible Cause Remedy Cannot turn on No power to scale Verify connections and voltage Poor accuracy Improper calibration Perform calibration Move scale to Unstable environment suitable location Cannot calibrate Unstable environment Move the scale to suitable location Incorrect calibration weight 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 Err 8 1 Pan has load during power on Remove weight from pan and re zero Zero has drifted In Service Menu run RAMP to check Load Cell Then calibrate Load Cell is damaged Replace Load Cell Err 8 2 Pan was removed prior to power Install
12. shows done and then returns 7 7 7 d to the previous application mode and scale is ready for use 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 Valor 3000 Series Service Manual A 1 Ohaus Corporation www ohaus com APPENDIX A STANDARD CALIBRATION Ohaus Corporation www ohaus com A 2 Valor 3000 Series Service Manual APPENDIX B THE SERVICE MENU APPENDIX B THE SERVICE MENU 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 B 1 Entering the Service Menu Turn the scale off Enter the Service Menu by pressing and holding O T On Off and MODE UNIT Menu together until RAMP appears Press Yes to select Ramp FIT B 2 Ramp The ramp display shows the percentage of use of the A to D circuit that is of the temperature compensated duty cycle The actual value is not as important as how it changes It should increase as the weight on the scale is increased The ramp display should remain constant without fluctuations If you press Yes to select Ramp a number appears It 7 7 should be constant Add masses from minimum to 7 Te maximum capacity The reading w
13. using the scale After temperature stabilization allow an additional 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 DO NOT USE CHEMICAL CLEANERS OR SOLVENTS 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 batteries and the scale malfunctions first replace the batteries to see if this resolves the problem The Valor 3000 takes four C LR 14 batteries 5 Make a visual inspection for faulty connectors wiring and loose hardware 3 2 OPENING THE SCALE Opening the Valor 3000 scale varies slightly according to the specific model as detailed below Use these procedures in order to replace the Load Cell the Printed Circuit Board and or LCD Display Valor 3000 Series Service Manual 3 1 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE PROCEDURES 3 2 1 Opening Valor 3000 Standard and Washable Models Common hand tools are sufficient to disassemble the Valor 3000 scales Turn the scale off and unplug the power cord before you begin 1 Remove the Weighing Pan pry off the seal tab remove the screw and washer securing the Pan Support
14. 0 7 seconds error CAL E appears for 3 seconds and the SV E umm menu returns to SPAN Start again Pressing Yes after placing the prompted weight accepts the span weight shown on the display The display then 71 shows C while the scale acquires the span value After the span value is acquired the display shows done N for 2 seconds and returns to SPAN Press No to 21411404 advance to the next option Geo To exit the Service re Menu press No until End appears Then press Yes 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 Valor 3000 Series Service Manual B 3 Ohaus Corporation www ohaus com APPENDIX B THE SERVICE MENU B 5 Geographical Adjustment Factor GEO The Geo Factor adjustment allows entry of values from 0 to 31 and is used to compensate for slight variations in gravity at different geographical locations around the world This feature allows authorized personnel to accurately calibrate the scale at a location other than the location where the scale is to be used Prior to calibration the Geo Factor is set to correspond to the geographical location where the calibration is being performed Following calibration the Geo Factor is c
15. 1X6 V31XW301 V31XW3 V31XW6 Calibration Weights 200g 2 kg 3 kg 6 kg 300 g 3 kg 6 kg 4 2 Operational Test 1 Connect a functioning Power Adapter to the scale power receptacle located on the bottom of the scale or install 4 C LR 14 batteries 2 Plug the Power Cord into a suitable power source 4 3 Segment Display Test Turn the scale on and ensure that all segments are enabled and displayed briefly This is a Segment Display Test See Figure 4 1 98888815 Figure 4 1 Segment Display 4 4 Load Cell Test Using RAMP To test the Load Cell using RAMP see Appendix B Valor 3000 Series Service Manual 4 1 Ohaus Corporation www ohaus com CHAPTER 4 TESTING 4 5 Performance Tests Accurate performance of the Valor 3000 scales is determined by a series of four performance tests The displayed readings are compared with the tolerances listed in Tables 4 2 and 4 3 Tolerance values are expressed in counts A one count difference is shown in the last digit on the scale display TABLE 4 2 TOLERANCES V3IXWS V31XWE Model 202 V31XH2 V3D3 V31X6 V31IXW30l V3DGN V3DON Precision 1 1 1 1 2 1 2 Repeatability 1 1 1 1 2 1 2 Linearity 1 1 1 1 2 1 2 NOTE The following performance tests are used to evaluate scale operation before and after repairs The scale must meet the requirements specified in each test as
16. 3 Plug the cable into the PC s RS232 port See Interface User connection and softwar Ohaus Corporation Figure C 2 Service Interface fits into the RS232 Interface with the gap on the left side when the label side is up on the RS232 Interface RS232 Interface connected to Service Interface connected to the scale s PCB circuit board side up 4 Install the software on a Personal Computer running Microsoft Windows NT 4 0 or later or Microsoft Windows 98 or later 5 Run the program Service Tool See next page Valor 3000 Series Service Manual C 1 Ohaus Corporation www ohaus com APPENDIX C SOFTWARE SERVICE TOOL INSTRUCTIONS C 1 Hardware and Software Setup continued 6 Open Configtool exe and click Check Scale fe ConfigTool 80252509A Check Scale Figure C 3 First screen of Configtool exe 7 Click COM port for Communication setup x Config Test Command COM port Settings Port Baudrate ByteSize StopBits Parity comi zl 2400 SN Sim None Figure C 4 Com Port Configuration screen with correct settings 8 The communications parameters should appear mid screen Correct values are Baud 2400 ByteSize 7 Parity None If the settings do not match click the arrow next to the parameter and select the correct value See Figure C 4 Ohaus Corporation www ohaus com C 2 Valor 3000 Series Service Manual APPENDIX C SOFTWARE SERVICE TOOL INSTRUCTIONS
17. 6 25 25 24 77 52 80256 30 29 29 28 28 27 27 26 26 25 25 80256 85245 30 30 29 29 28 28 27 27 26 26 25 85245 90200 31 30 30 29 29 28 28 27 27 26 26 Ohaus Corporation www ohaus com D 2 Valor 3000 Service Manual OHAUS 8 0 2 5 2 5 9 1 P N 80152591 SERVICE MANUAL Valor 3000 SERIES SCALES
18. 9 18 18 17 17 16 53 31 54 41 22 21 21 20 20 19 19 18 18 17 17 54 41 55 52 22 22 21 21 20 20 19 19 18 18 17 Valor 3000 Service Manual D 1 Ohaus Corporation www ohaus com APPENDIX D GEOGRAPHICAL ADJUSTMENT VALUES TABLE D 1 GEOGRAPHICAL ADJUSTMENT VALUES Elevation above sea level in meters Geographical 0 325 650 975 1300 1625 1950 2275 2600 2925 3250 latitude away 325 650 975 1300 1625 1950 2275 2600 2925 3250 3575 from the equator North Elevation above sea level in feet or South in degrees and 0 1060 2130 3200 4260 5330 6400 7460 8530 9600 10660 minutes 1060 2130 3200 4260 5330 6400 7460 8530 9600 10660 11730 55 52 57204 23 22 22 21 21 20 20 19 19 18 18 57 04 58917 23 23 22 22 21 21 20 20 19 19 18 58 17 59932 24 23 23 22 22 21 21 20 20 19 19 59 32 60249 24 24 23 23 22 22 21 21 20 20 19 60 49 62 09 25 24 24 23 23 22 22 21 21 20 20 62 09 63230 25 25 24 24 23 23 22 22 21 21 20 63 30 64255 26 25 25 24 24 23 23 22 22 21 21 64 55 66 24 26 26 25 25 24 24 23 23 22 22 21 66 24 67257 27 26 26 25 25 24 24 23 23 22 22 67 57 69935 27 27 26 26 25 25 24 24 23 23 22 69 35 71921 28 27 27 26 26 25 25 24 24 23 23 71 21 73716 28 28 27 27 26 26 25 25 24 24 23 73 16 75224 29 28 28 27 27 26 26 25 25 24 24 75 24 77 52 29 29 28 28 27 27 26 2
19. E is displayed for 3 seconds and the menu returns to LIN Pressing Yes after placing the prompted weight accepts the linearity full capacity weight The display shows C while the scale acquires the weight reading After the full capacity value is acquired the display shows done for 2 seconds and returns to LIN Press No to move to Span calibration Then press Yes 4 7 f A D P P re RR No aal We R D P E P Ohaus Corporation www ohaus com B 2 ValorTM 3000 Series Service Manual APPENDIX B THE SERVICE MENU B 4 Span Calibration Span calibration from the service menu allows you to set a new zero and maximum setting This is distinct from user level span calibration which allows a user to adjust the zero and maximum setting within the range established by the service menu span setting Span calibration automatically follows Linear calibration To start from the Service Menu press and hold O T On Off and MODE UNIT Menu together As the scale powers up RAMP appears Press No to bypass Ramp Lin appears Press No SPAN appears Press Yes GE AV SUG The display shows amp while the scale acquires the zero value The specified maximum mass weight flashes 7777 Place the indicated weight in the center of the Pan A 4 ha Aa If the target weight is not placed on the pan within 1
20. NTENANCE PROCEDURES 3 1 Preventivo Maintenance 3 1 3 1 1 Preventive Maintenance Checklist mmme nene nenea 3 1 3 2 Opening the 3 1 3 2 1 Opening Valor 3000 Standard and Washable Models n 3 2 3 3 Replacing the Load ito eti tie p ei acute css 3 3 3 4 Replacing the Printed Circuit Board and 3 4 3 5 Replacing the Housing Seals eite ponet roe Rc a 3 5 3 6 Replacing the Function Label uer ren ra ner ene a 3 6 3 7 Replacing the Plastic NSE se res ceace eee dee ente e t pc esse idas 3 6 CHAPTER 4 TESTING 4 1 4 1 1 Test Masses 0 220444 0000 nana 4 1 4 2 Operational Test 5 at bau 46 4 1 425 Segment Display pc 4 1 4 4 Load Cell Test Using RAMPE dais 4 1 4 5 Performance Tesis oi te al e a al eee eee 4 2 Z 5 T siete ciim it A e 4 2 4 5 2 Repeatability 4 3 4 5 3 Linearily TOS e 4 5 4 5 4 Off Center Load Lest Tu 4 5 4 5 5 Adjusting Off Center Load uoc rk 4 6 CHAPTER 5 DRAWINGS AND PARTS LISTS 5 1 Valor 3000 Xtreme Scales Housing amp Internal Parts 5 2 5 2 Valor 3000 Xtreme W Scales Housing amp Internal 5 4 Ohaus Corporation www oh
21. ODE UNIT Menu simultaneously during power on Press No three times until GEO appears then press Yes Then continuously press No until the desired number appears Press Yes then No until END appears Press Yes to return to weighing mode 5 Access the Setup menu Press and hold MODE UNIT Menu until SEtUP appears Press Yes to enter the displayed menu or No to advance to the next menu etc Set the following Auto Zero Tracking AZT 0 54 Stability Stab 1d Units as per local LFT requirements 6 Perform an accurate calibration See Appendix A 7 Turn the Scale off and disconnect the AC power connection 8 Open the rectangular LFT Calibration Lock Switch Cover on the bottom of the scale 9 Move the switch to the right closer to the C in CAL which turns LFT on 10 Reinstall the LFT Calibration Lock Switch Cover 11 Reconnect the AC power press O T On Off to turn on the scale During power on the display sequence will now include LFT This message confirms the proper setting of the LFT mode and the hardware lock switch Ohaus Corporation www ohaus com 1 6 Valor 3000 Series Service Manual CHAPTER 1 GETTING STARTED 1 7 Menu Structure Programmable features of the Valor 3000 are contained in menus which are accessed through the Display Panel s control switches The menu structure is illustrated below For more detail on using the menus see the Instruction Manual TABLE 1 5 VALOR 3000 MENU ST
22. RUCTURE SETUP Press and hold UNIT appears after pressing MODE UNIT Menu until SETUP Yes to end SETUP menu appears Press Yes Press Yes Stability g Automatic Zero Tracking AZT Kg Filter Oz Backlight gt Lb Auto Off Lb Oz Power On Unit FL Global Reset 96 Legal For Trade S Specific Gravity End Setup End Units CALIBRATION Press and hold ENTER Cal until CAL appears and calibration begins See Appendixes A amp B for more details Legal For Trade is included only in models V31XW301 V31XW3 V31XW6 V31XW3N and V31XW6N Valor 3000 Series Service Manual 1 7 Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED Ohaus Corporation www ohaus com 1 8 Valor 3000 Series Service Manual CHAPTER 2 DIAGNOSTIC GUIDE 21 TROUBLESHOOTING This section of the manual contains troubleshooting information Information is contained to isolate specific problems using Table 2 1 Diagnostic Guide Follow all directions step by step Make certain that the work area is clean Handle scale components with care Use appropriate Electro Static Device 2 2 DIAGNOSTIC GUIDE Table 2 1 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 scale read all chapters of this manual to be familiar with the
23. again accepts it the setting Pressing No causes OFF to appear In either case E PAND appears again Press Yes to change the setting To accept a chosen setting either ON or OFF press No when E PAND appears End ZC GC appears If you selected ON to activate E PAND mode the scale will remain in high resolution readability until it is turned off When the scale is switched off E PAnd is automatically set to off Valor 3000 Series Service Manual B 5 Ohaus Corporation www ohaus com APPENDIX B THE SERVICE MENU Ohaus Corporation www ohaus com B 6 Valor 3000 Series Service Manual APPENDIX C SOFTWARE SERVICE TOOL INSTRUCTIONS APPENDIX C SOFTWARE SERVICE TOOL INSTRUCTIONS The Software Service Tool Part Number 80252509 is required when either a main PC Board or a Load Cell is replaced in a Valor 3000 scale It is used to re configure the scale to its original parameters in the case of a PCB replacement or new parameters in the case of a Load Cell replacement C 1 Hardware and Software Setup 1 First check that the scale s A Off feature under the SETUP menu is set to OFF If this setting is left ON the scale will shut off during configuration 2 To connect the scale to a personal computer use the hardware interface See Figures C 1 and C 2 RS232 Interface and Cable PN 71147376 or 72206287 A Communications Service Interface PN 72203450 that attaches to the RS232 Interface
24. an approved Electro Static Device Valor 3000 Series Service Manual 1 1 Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED 1 3 TOOLS AND TEST EQUIPMENT REQUIRED 1 Common hand tools are sufficient to disassemble the Valor 3000 scales 2 RS2323 Interface Connector PN 71147376 or 72206287 3 Communications Service Interface PN 72203450 1 4 SPECIFICATIONS Complete specifications for the Ohaus Valor 3000 Scales are listed in Table 1 1 When a 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 Model VIIXHXP VEDH2 V3DG vane IDEE Capacity 200 2000 3000 6000 300 3000 6000 Repeatability g 0 01 0 1 1 0 2 1 2 Linearity 0 0 01 0 1 1 0 2 1 2 Weighing Units 9 Kg Ib oz Ib oz Application Modes Weigh Percent weighing Specific Gravity Fluid Ounces Tare range To capacity by subtraction Stabilization Time lt 3 seconds Power Requirements 9 VDC 500 mA AC adaptor supplied or 4 C LR14 batteries not supplied Calibration Digital with external weight Display Type 6 digit 7 segment LCD with white LED backlight Display Size 15 mm 0 6 digits Keypad 3 button overlay OIML Class Ingress Protection 5 65 65
25. and lift off the Pan Support 2 Remove the Load Cell Seal and Ring XW models only See Figure 3 1 Start by lifting the outer edge then gently lift to pull the O ring and seal from the center 3 Remove the screws holding the Housing in place See Figure 3 2 The screw on the left side may have a tamper evident seal used in Legal For Trade application See Section 1 8 for more details Figure 3 1 Proper way to lift off Seal Screws that secure the Housing each with a seal washer inside AN Note If separating the Top and Bottom Housing is difficult because of the seal gasket between them do not apply pressure to the top of the Load Cell while holding the Housing to release it from the Bottom Plate Figure 3 2 Scale Bottom Valor 3000XW 4 Replace a screw without tightening it in the hole closest to the back end of the scale Use a thumb sized coin to press the screw while holding the leveling feet on either side The Top 4 Housing should come off See Figure Figure 3 3 T 3 3 echnique for separating Top and Bottom Housing on Valor 3000 Ohaus Corporation www ohaus com 3 2 Valor 3000 Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES 3 3 Replacing the Load Cell The Load Cell may need to be replaced because of scale instability or because the scale does not calibrate or repeat or because it is physically broken or displays an error code 1 2 10 11 Open the
26. aus com i Valor 3000 Series Service Manual TABLE OF CONTENTS Appendix A STANDARD CALIBRATION Page No DR 1 Appendix THE SERVICE MENU B 1 Entering the Service Menu ette B 1 LE 2 EE B 1 2 Bi Span B 3 B 5 Geographical Adjustment Factor GEO eee une B 4 Expanded Readability E P AD een a B 5 APPENDIX C SOFTWARE SERVICE TOOL INSTRUCTIONS C 1 Hardware and Software Setup nenea EEN C 1 C 2 Configuring the Scale after replacing the PCB or Load Cell C 4 APPENDIX D GEOGRAPHICAL ADJUSTMENT VALUES TABLE D 1 Geographical Adjustment Values D 1 LIST OF TABLES TABLE NO TITLE Page No 1 1 Specifications T EE 1 2 1 2 Capacity and Readability necesite te errat natae tc ena a 1 3 1 3 Functions of Display 1 4 1 4 Display ze 1 5 1 5 Valor 3000 Menu Structure E 1 7 2 1 GUAE TH Or a i ee 2 2 4 1 Calibration 1 2 4 2 e cps c iio 4 2 4 3 Repeatability 2 4 4400 444000 nnne 4 4 4 4 Linearity Test en ea 4 5 5 1 Valor 3000 Xtreme Scales Housing amp Internal 5 3 5 2 Valor 3000 Xtreme W Scales Housing amp Internal 5 5 D 1 Geographical Adjustment Values nn cnnnnnn
27. be utility masses NOTE The scale must pass the Precision and Repeatability Tests and be calibrated before the Linearity Test may be performed TABLE 4 4 LINEARITY TEST MASSES Capacity g 200x001 2000x0 1 3000x1 6000x1 300x021P 3000x1lP 6000x2IP Reference Wt 50 500 750 1500 75 750 1500 Load 1 50 500 750 1500 75 750 1500 Load 2 100 1000 1500 3000 150 1500 3000 Load 3 150 1500 2250 4500 225 2250 4500 NOTE All masses are nominal values Be certain to use the same reference mass throughout the procedure 1 Place the test mass on the Scale record the weight and remove Place Load 1 on the Scale and press TARE Place the test mass on the Scale record the weight and remove Place Load 2 on the Scale and press TARE Place the test mass on the Scale record the weight and remove Place Load 3 on the Scale and press TARE Place the test mass on the Scale and record the weight PA St e 0X Jo The difference in the weights of the test mass should be within the tolerance Table 4 1 If not calibrate see Appendix A 1 and repeat the test 9 Ifthe Scale remains out of tolerance the Load Cell may need to be replaced 4 5 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 Place half of the scale s capacity in the center of the Pan 2 Not
28. e the reading 3 Move the mass halfway between the center and the edge to the front of the Pan Note any differences in the displayed weight reading 4 Repeat the test for the back left and right position of the Pan Maximum allowable change in displayed weight readings for each of the four positions can be found in Specifications Tables Chapter 1 If this maximum is exceeded follow procedures in Section 4 5 5 Adjusting Off Center Load Valor 3000 Series Service Manual 4 5 Ohaus Corporation www ohaus com CHAPTER 4 TESTING 4 5 5 Adjusting Off Center Load If the Off Center Load OCL is excessive perform adjustment as follows 1 Top view of Load Cell Side view of Load Cell Weighing Pan s center with points A D indicated Figure 4 2 Scale drawing of Valor 3000 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 reading 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 N o Bo m 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
29. hanged to match the location where the scale is to be used If required the scale may also be sealed according to the required approval regulations NOTE A Only an authorized manufacturer s representative or certified verification personnel should make these changes Changing the Geo Factor alters the calibration values In the Service Menu press No when the display reads SPAN GEO appears Press Yes to edit the GEO setting Em cd The current setting is the first to be shown wW 7 NOTE Factory setting for GEO is 13 in general and 19 for Europe Press No until the desired setting appears ZE Values from 1 to 31 are available See La 74 Ma Appendix D to determine the correct value Press Yes to accept the value shown on the display The menu returns to GEO Ohaus Corporation www ohaus com B 4 Valor 3000 Series Service Manual APPENDIX B THE SERVICE MENU B 6 Expanded Readability E PAnd E PAnd sets the readability to 1 10 of the standard readability That is if standard readability is 01 with E PAND on it would be 001 Normally E PAND is off Once it is set on it will be on until the scale is switched off When the scale is switched off E PAnd is automatically set to off In the Service Menu press No when the display reads GEO E PAND appears Press Yes to enter the E PAND setting menu E SUIS E PAND appears again Press Yes to turn it y y A 1117 on ON appears Pressing Yes
30. he Load Cell may need to be replaced Ohaus Corporation www ohaus com 4 2 ValorTM 3000 Series Service Manual CHAPTER 4 TESTING 4 5 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 follows Set Up Enter the menu and adjust and record the following settings A Setthe Stability setting to its lowest setting B Setthe Filter level to medium or the center of its range C Set the AZT Auto Zero Tracking to Bd or its lowest setting Do not turn it off D Setthe instrument to display the same units as the performance specifications Usually kg g or mg Record Settings Stability Setting Filter Level Setting Auto Zero Tracking Setting Displayed Units Mass Used TEST PROCEDURE 1 Zero the instrument 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 4 Repeat this test starting at Step 1 until you record a total of ten readings Fill in the worksheet Table 4 3 with the ten 10 readings Valor 3000 Series Service Ma
31. ht values Symbols for weighing modes include FL Fluid Ounces 96 Percent of referenced weight S Specific Gravity kg Kilograms Ib oz Pounds amp Ounces 1 5 3 Power ON With power applied press O T On Off After segment display and software revision number there is a countdown 3 2 4 and then 0 00 oz standard weighing mode If the scale is set for LFT Legal For Trade available on XW and NTEP N models LFT flashes briefly after the software revision number and before the countdown To reverse the LFT setting see Section 1 7 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 an additional 20 minutes after turning the scale on for the scale electronics to stabilize When the scale is first turned on the factory default is to weigh in grams and tare items without setting the menus 1 5 4 Power OFF To turn the scale OFF press and hold gt lt until the display indicates OFF then release 1 5 5 Menu Setup Programmable features of the Valor 3000 scales are contained in menus which are accessed through the Display Panel s control switches The Menu Structure is described in Section 1 8 For more detail on using the menus see the Instruction Manual Note If
32. ill increase but aliud should not fluctuate The example at right is with no weight on the Pan It will vary with other scales To exit the ramp function press No The scale advances to the Linear calibration menu P Press Yes to perform Linear Calibration A 114 See next page mx Note Be careful not to touch the scale or the table while calibration is in progress as it will cause the process to fail Valor 3000 Series Service Manual B 1 Ohaus Corporation www ohaus com APPENDIX B THE SERVICE MENU B 3 Linear Calibration Linear calibration automatically follows Ramp To start from the Service Menu press and hold O T On Off and MODE UNIT Menu together As the scale powers up RAMP appears Press No to bypass Ramp When Linear appears press Yes The display shows L zero value while the scale acquires the After the zero value is acquired the display shows the first calibration point value Place the indicated weight on the Pan and press Yes If the target weight is not placed on the pan within 10 seconds error CAL E is displayed for 3 seconds and the menu returns to LIN Pressing Yes after placing the prompted weight accepts the linearity mid point weight The display shows C while the scale acquires the weight reading After the mid point value is acquired the display shows the second calibration point value If the target weight is not placed on the pan within 10 seconds error CAL
33. in reverse order Configure the Scale See Appendix C Note There is no need to disassemble the Load Cell It is supplied as an assembled unit See Chapter 5 for parts lists Valor 3000 Series Service Manual 3 3 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE PROCEDURES Screws holding 3 4 Replacing the Printed Circuit Board and Display PCB in place p me de Ze Open the scale see Section 3 2 1 Disconnect the cable from the PCB to the Load Cell Follow the procedure in Section 3 3 Remove the four screws that hold the PCB in place Lift the PCB up from the Housing Insert the replacement PCB Follow these steps in reverse order to install the new PCB Turn the scale on Err will appear This is normal Configure the Scale See Appendix C Note The PCB and the LCD Display are supplied as a single unit However if only the LCD Display needs replacement it can be separated from the PCB by removing the two screws in the bottom of the PCB and unsoldering the 24 fine lead wires connecting it to the PCB When installing the new LCD Display carefully feed the lead wires through their holes then insert the two screws and finally solder the 24 lead wires Ohaus Corporation www ohaus com 3 4 Valor 3000 Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES 3 5 Replacing the Housing Seals the LFT switch 1 Screws securing Tamper evident screw cover Open scale following in
34. nnnns D 1 LIST OF ILLUSTRATIONS FIGURE NO TITLE 1 1 Power Connection and Seal ui BR 1 4 1 2 Valor 3000 Xtreme amp Xtreme W 1 4 1 3 Valor 3000 Display Indicators i se ati aie it co e idas 1 5 1 4 LET Cal ca oi a at tt a ca ceia 1 6 3 1 Seale BO ON anne nee ee ee ee 3 2 3 2 Technique for separating Top and Bottom Housing on Valor 3000 3 2 3 3 Red lock between battery 3 3 3 4 Printed Circuit Board and Display scada an 3 4 3 5 Bottom of Valor 3000 Xtreme W with Battery Cover 3 5 3 6 Seal washer for Weighing Plate 3 5 3 7 Seal washer on left rear of PDC 3 5 3 8 Plastic Insert and Function 3 6 3 9 Plastic Insert viewed from inside Top 3 6 4 1 Segment Display xx T 4 1 4 2 Scale drawing of Valor 3000 Load Cell and Weighing Pan 4 6 Valor 3000 Series Service Manual ii Ohaus Corporation www ohaus com TABLE OF CONTENTS TABLE NO TITLE Page No 5 1 Valor 3000 Xtreme Scales Housing amp Internal 5 2 5 2 Valor 3000 Xtreme W Scales Housing amp Internal
35. nual CHAPTER 5 PARTS LISTS amp DIAGRAMS 51 VALOR 3000 XTREME SCALES HOUSING amp INTERNAL PARTS TABLE 5 1 VALOR 3000 XTREME SCALES HOUSING amp INTERNAL PARTS Drawing Item Description 1a Pan Square 146mm x 158mm 2a Pan Support Square 1b Pan Round 120mm 2b Pan Support Round 3 Plastic insert Non IP 4 Function Label without Level 5 Housing Top Ex IP Model No Labels 6 Load Cell 7 Housing Bottom 8 Seal Kit Housing 10 Housing Bottom Plate No LFT 11 Feet 4 Adjustable 12 Battery Cover Seal and Screws 13 PCB Main Low Resolution 14 LCD with Backlight 15 Seal AC Adapter 16 Hardware Kit 80 Adapter Valor 3000 Series Service Manual 5 3 Ohaus Corporation www ohaus com CHAPTER 5 PARTS LISTS amp DIAGRAMS 5 2 VALOR 3000 XTREME W SCALES HOUSING amp INTERNAL PARTS e Sei 25 pb RN _ gt TUI 5 an 8 8 Figure 5 5 Valor 3000 Xtreme W Scales Housing amp Internal Parts Ohaus Corporation www ohaus com 5 4 Valor 3000 Series Service Manual CHAPTER 5 PARTS LISTS amp DIAGRAMS 5 2 VALOR 3000 XTREME W SCALES HOUSING amp INTERNAL PARTS TABLE 5 5 VALOR 3000 XTREME W SCALES HOUSING amp INTERNAL PARTS Drawing Item Description 1 Pan Square
36. nual 4 3 Ohaus Corporation www ohaus com CHAPTER 4 TESTING 4 5 2 Repeatability Test TABLE 4 3 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 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 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 4 Valor 3000 Series Service Manual CHAPTER 4 TESTING 4 5 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
37. on www ohaus com CHAPTER 1 GETTING STARTED 1 5 SCALE OPERATION This section contains information on the basic operation of the scale The included AC adapter may be used to power the scale when battery power is not available Remove the rubber seal in the bottom Store it in the location provided See Figure 1 1 Connect the AC adaptor plug to the input jack Seal Storage Receptacle Figure 1 1 Power Connection and Seal 1 5 1 OVERVIEW OF THE CONTROLS Figure 1 2 Valor 3000 Xtreme amp Xtreme W Displays TABLE 1 3 FUNCTIONS OF DISPLAY CONTROLS O T On Off Short Press when off Turns scale on Short Press when on Sets display to zero Tares weight of item on pan Long Press Turns scale off MODE UNIT Short Press Steps through active units and modes Menu Long Press Enters Menu Short Press Menu mode No toggles through available settings ENTER Cal Short Press Stores 10096 reference in mode Stores reference sample in SG mode Long Press Initiates span calibration process Short Press Menu Yes selects accepts displayed setting Ohaus Corporation www ohaus com 1 4 Valor 3000 Series Service Manual CHAPTER 1 GETTING STARTED 1 5 2 OVERVIEW OF THE DISPLAY INDICATORS 0908881 2 Figure 1 3 Valor 3000 Display Indicators TABLE 1 4 DISPLAY INDICATORS Indicates that the measured value has become stable Standard 7 segment numeric characters used for displaying weig
38. pan and re zero on Zero has shifted In Service Menu run RAMP to check Load Cell Then calibrate Load Cell is damaged Replace Load Cell OVER Weight on pan exceeds capacity Remove weight from the pan UNDER Pan was removed during Re install pan weighing Err 9 New PCB installed Configure scale see Appendix C Factory calibration data Perform service calibration corrupted REF Err Reference Weight is too small Use larger sample LOWrEF Reference Weight is too low for Continue to weigh with less accurate accurate percent weighing results Menus are locked Scale is set for LFT Turn LFT off See Section 1 7 out Cal Stab AZT Filter Power On Unit or Global Reset Ohaus Corporation www ohaus com 2 2 Valor 3000 Series Service Manual CHAPTER 3 MAINTENANCE PROCEDURES 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 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 temperature change before
39. s and Parts Lists Contains exploded views of Valor 3000 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 adjust the GEO Factor and use E PAnd to set the readability to 1 10 of the standard readability Appendix C Software Service Tool Instructions Used to re configure the scale after replacing a Printed Circuit Board or Load Cell Appendix D Geographical Adjustment Values The chart of scale settings for every geographical latitude away from the equator in degrees and minutes and every elevation above sea level in meters or feet 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 e Work surface must be stable and level e Scale must not be exposed to direct sunlight or radiating heat sources e Use
40. scale see Section 3 2 1 Disconnect the cable connecting the PCB to the Load Cell XW models it is a flat ribbon cable Gently pry up the collar holding the cable Use a flat head screwdriver to move the collar to the up position on both sides The cable will then lift out non XW models it is a four wire cable affixed to the PCB with a white tab pin receptacle It is easiest to lift out the tab if the PCB is first removed See Section 3 4 below To release the Load Cell turn the scale over holding the Load Cell by hand and remove the six screws inside the two Battery Compartments Turn the scale back on its feet and gently lift off the Load Cell Unlocked position on If the Load Cell is malfunctioning replace it red Shipping Lock Up Down Stop Before installing the replacement Load Cell check that the red Shipping Lock on the plastic panel between the Battery Compartments is in the unlocked position Carefully position the Load Cell so the black plastic tab at the rear fits into the brass Up down Stop and the screw holes in the steel plate align with their counterparts in the two Battery M Compartments Figure 3 4 Red lock between battery compartments Turn the scale over Insert and tighten the screws When installing the new Load Cell insert the cable connecting it to the PCB Reverse the procedure in Step 1 above To assemble the Housing follow the steps in Section 3 2 1
41. structions in Section 3 2 1 Note the condition of the Load Cell Seal and Ring which may also need to be replaced Remove the leveling feet and the two screws that secure the Legal For Trade LFT switch cover See Figure 3 6 Remove the screws holding the Bottom Plate Then lift off the Bottom Plate See Figure 3 6 Carefully position the Bottom Plate Seal to align with the matching holes on the Bottom Plate Then mount the Bottom Plate on the Bottom Housing and insert and tighten the six small screws that hold it Re install the leveling feet and then mount the Bottom Plate Gasket Turn the scale over and replace the seal washers in the holes of the screws that hold the Top Housing in place See Figure 3 2 There is a seal washer to the left of the PCB inserted beneath a screw and steel washer on the left rear of the PCB See Chapter 5 for the Housing Seal Kit Figure 3 8 Seal washer on left rear of PCB Mount the Top Housing careful to S alwasher for clear the Bottom Plate Gasket on Pan Support all sides Then insert all screws Pan Support Insertion hole Screw amp washer for seal washer Install the new seal on the Pan Support Insert it through the hole shown in Figure 3 9 Figure 3 9 Seal washer for Weighing Plate Valor 3000 Series Service Manual 3 5 Ohaus Corporation www ohaus com CHAPTER 3 MAINTENANCE PROCEDURES 3 6 Replacing the Function Label The Function Label
42. the scale is set for LFT on XW and NTEP models the Unit and Calibration menus are not accessible and the following Setup submenus are not accessible Stability AST Filter Power On Unit and Global Reset To gain access to these submenus see the next section Valor 3000 Series Service Manual 1 5 Ohaus Corporation www ohaus com CHAPTER 1 GETTING STARTED 1 6 LEGAL FOR TRADE LFT When the scale is set for LFT on XW and NTEP models the following menu settings cannot be accessed changed Calibration Unit Stability AST Filter Power On Unit and Global Reset To regain access to the locked menu settings remove the small rectangular LFT Calibration Lock Switch cover on the bottom of the scale See Figure 1 4 Use a small flathead screw driver to move the CAL switch to the left closer to the L in CAL which turns LFT off After the LFT CAL Lock setting has been turned off the scale must be inspected in accordance with local weights and measures regulations before it can be used in LFT mode again Local authorities may apply seals on the three screws indicated in Figure 1 4 Screws to which LEFT 2 seals may be applied Figure 1 4 FT Cal Lock Switch EN poe ASS ed 1 6 1 LFT SETUP PROCEDURE 4 Setthe Geographical Adjustment Factor GEO according to the location where the scale is to be used See Appendix D Possible values are from 1 to 31 The setting is in the Service Menu press O T Off and M
Download Pdf Manuals
Related Search