Service Manual - Test Equipment Depot
Contents
1. Figure A 2 Linear Calibration Menu readings 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 settings and calibration no pre set limits as well as setting the Geo code There is also a Ramp display used to indicate the condition of the load cell Please refer to the Service Menu diagram Display Ramp Value Factory use only Exits to Weigh Mode Figure A 1 Service Menu Flow Chart B 1 ENTERING THE SERVICE MENU 1 The following conditions must be met before entering the Service menu AN The Security Slide on the bottom of the scale must be in the OFF position See Figure 1 5 page 1 8 Inthe Setup menu LFT must be turned OFF See note Inthe Lock menu Calibration Lock must be set to OFF See note NOTE This requirement is waived when there is an EEPROM checksum error N Turn the scale on O To enter the Service Menu press and hold TARE and G N T together for at least ten seconds until SERVE appears briefly followed by CAP B 2 NAVIGATION A blinking item on the display indicates a choice to make ON ZERO Off 3 Press Yes to accept the displayed choice Yes Press No to advance to the next choice or the next menu 0 2 9 Press Exit to exit the service menu and return to displaying the weight Back2. 5 8 5 5 Valor 5000 V31XW3 Scale Housing Internal Parts 5 10 TABLE OF CONTENTS Page No 5 6 Valor 5000 V31XW3 M Scale Housing amp Internal Parts 5 12 5 7 Valor 5000 V31XW6 Scale Housing amp Internal Parts 5 14 5 8 Valor 5000 V31XW6 M Scale Housing Internal Parts 5 16 5 9 Valor 5000 V31XW301 Scale Housing Internal Parts 5 18 5 10 Valor 5000 V31XW301 M Scale Housing Internal Parts 5 20 Appendix A STANDARD CALIBRATION M E seu A 1 Appendix B SERVICE CALIBRATION DF PORNO TING IC I AN redes B 1 irc E OU EU SA B 1 B3 Linear leo AP ee ee B 2 B4 Span AN MN mm B 3 B 5 Geographical Adjustment Factor B 4 B 6 Expanded Readability E PAnd B 5 APPENDIX C SOFTWARE SERVICE TOOL INSTRUCTIONS C 1 Hardware and Software SetUp cccooocccccoconcnncononcnnnononcnnnnnnocnnnononnnnnnnnnnnnnnnnnnnnnnnnanennns C 1 C 2 Configuring the Scale after replacing the PCB or Load Cell C 3 APPENDIX D GEOGRAPHICAL ADJUSTMENT VALUES TABLE 0 1 Geographical Adjustment D 1 LIST OF TABLES TABLE NO TIT
3. 3 1 3 1 1 Preventive Maintenance CheckliSt ccccoooccnnccccccnncccononncocnononnconanonncnnancnnnos 3 1 3 2 Opening ING dada 3 1 3 2 1 Opening Valor 5000 Standard and Washable Models 3 2 3 3 MEDIACING Load een ae 3 3 3 4 Replacing the Printed Circuit Board and 3 4 2 5 4Reblacing the HOUSING 5 hip a a 3 5 3 5 Replacing the Funci n Label stetur ere ah 3 6 36 Replacing ING Plastic 3 6 CHAPTER 4 TESTING 4 1 TESTI ER 4 1 4 1 1 Test Masses equi inscrito deis 4 1 Operational TOS uri ata 4 1 4 3 Segment Display Test rennen a ee 4 1 44 Load Gel Test Using RAMP uiti aaa a 4 1 4 5 sPEHOMMAaANGe I TM LTEM 4 2 Al Precisi n estu EET 4 2 4 59 21 Iepeatabilly PO 4 3 459 terciaria tecla 4 5 454 On Center Load Test seen 4 5 45 9 Adjusting ON Center ee 4 6 CHAPTER 5 DRAWINGS AND PARTS LISTS 5 1 Valor 5000 V31X3 Scale Housing amp Internal 5 2 5 2 Valor 5000 V31X6 Scale Housing amp Internal 5 4 5 3 Valor 5000 V31XH2 Scale Housing 8 Internal 5 6 5 4 Valor 5000 V31XH202 Scale Housing Internal
4. 5 4 Valor 5000 V31XH2 Scale Housing amp Internal 5 6 Valor 5000 V31XH202 Scale Housing Internal Parts 5 8 Valor 5000 V31XW3 Scale Housing amp Internal 5 10 Valor 5000 V31XW3 M Scale Housing Internal Parts 5 12 Valor 5000 V31XW6 Scale Housing amp Internal 5 14 Valor 5000 V31XW6 M Scale Housing Internal 5 16 Valor 5000 V31XW301 Scale Housing amp Internal 5 18 Valor 5000 V31XW301 M Scale Housing amp Internal Parts 5 20 RS232 Interface connected to Service Adapter connected to PCB C 1 Com Port Configuration screen with correct settings C 2 Config Tool s Test Command screen C 2 The Config Tool s Configuration Screen C 3 TABLE OF CONTENTS CHAPTER 1 GETTING STARTED 1 1 INTRODUCTION This service manual contains the information needed to perform routine maintenance and service on the Ohaus Valor 5000 Series scales Familiarity with the scale s Instruction Manual is assumed The contents of this manu
5. CHAPTER 2 DIAGNOSTIC GUIDE 2 2 2 Checking Load Cells for Trouble 2 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 2 TABLE 2 2 COLOR CODE FOR LOAD CELL WIRING BLACK RED GREEN WHITE Color codes may vary Insert the Pan Support Caps 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 1 and 4 of the Load Cell connection on the PCB EXE and EXE See Figure 2 2 This voltage must be approximately 5 0 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 5 Volts dc the Load Cell is defective and must be replaced If the voltage remains low the PCB is defective and must be replaced 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 the PCB points 2 and 3 in Figure 2 2 These measurements represent the output of the Load Cell Record measurements at Ze
6. rt APPENDIX GEOGRAPHICAL ADJUSTMENT VALUES TABLE 0 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 cm ee equator North evation above sea level in feet or South in degrees and 1060 2130 3200 4260 5330 6400 7460 8530 9600 10660 minutes 1060 2130 3200 4260 5330 6400 7460 8530 9600 10660 11730 23 22 22 21 21 20 20 19 19 18 18 0002 57904 5704 58017 58 17 5932 59 32 60 49 60 49 62909 6209 63 30 6330 64755 64 55 66724 6624 67797 67 57 69 35 6939 71 21 71 21 3 16 73 16 7924 75 4 77 2 7792 80996 80 56 85745 8545 90900 Test Equipment Depot 800 517 8431 99 Washington Street Melrose MA 02176 TestEquipmentDepot com 8 0 2 5 1 1 5 9 P N 80251139 SERVICE MANUAL VALOR 5000 SERIES SCALES
7. Press Back to back up one step in the menu 9 Exit APPENDIX B THE SERVICE MENU B 3 CAPACITY The capacity function allows you to set the capacity to match the installed Load Cell il Press and hold TARE and G N T together for at least 10 seconds SERVE appears SEru When you release the buttons CAP appears To check the scale s capacity press ON ZERO 3 kg flashes 4 kg To accept the displayed capacity press Yes To change the capacity to match the Load Cell PEA press No until the correct capacity appears then press Yes to accept GEG Then GEO appears B 4 GEOGRAPHICAL ADJUSTMENT FACTOR This menu item is used to compensate for slight variations in gravity at different geographical locations around the world It allows entry of values from 0 to 31 Complete Geographical Adjustment Factors are listed in Appendix C The default Geo factor is 19 for Europe and 16 for the USA 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 set the Geo factor to correspond to the geographical location where the calibration is being performed Following calibration change the Geo factor 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 2 CAL is now displayed With GEO displayed press Yes The code for
8. MAINTENANCE PROCEDURES 3 3 2 Overload Protection Stop Adjustment When a Load Cell has been replaced in the existing Load Cell Frame the Overload Protection Stops must be set before calibrating or testing the scale This requires mm feeler gauges ranging from 0 35 mm to 2 1 mm or inch feeler gauges 0 013 in to 0 082 in See Table 3 2 1 At each Overload Stop Protection location insert the proper feeler gauge as specified in Table 3 2 2 With the correct feeler gauge positioned in the first Overload Protection Stop press down on the Frame and check for movement of the Frame Adjust the Overload Protection Stop until there is no movement with the feeler gauge inserted The resulting gap should be the thickness of the feeler gauge 3 Repeat this procedure for all of the Overload Protection Stops using the appropriate feeler gauges 4 When the initial gap settings have been made recheck all gap settings and adjust as required 5 Use a thread locking solution to coat all down stop screws so they will not move TABLE 3 2 LOAD CELL OVERLOAD PROTECTION STOP GAP SETTINGS CAPACITY LONG ARM o 0 7 0 028 in 0 5 0 02 in 0 5 0 019 in 1 0 0 039 0 5 mm 0 02 in 0 75 0 029 in 1 4 0 055 in 0 7 0 028 in 1 2 0 047 in 2 5 0 098 0 9 0 035 in 1 4 0 055 in 6 Reassemble the scale 7 Perform a Service Calibration See Appe
9. Weighing Checkweighing Percentage Checkweigh indication 3 LEDs yellow green red with configurable alert beeper Power 9 12 VDC 0 5A 0 8A AC adaptor internal rechargeable sealed lead acid battery Battery Operating Time 120 hours Tare range To capacity by subtraction Stabilization Time Within 2 seconds Auto zero tracking Off 0 5 1 or 3 divisions Operating Temperature Range 10 to 40 C 14 to 104 F Storage Temperature Range 40 to 70 C 40 to 104 F Approved Temperature Range 0 to 40 C 32 to 104 F Pan Size D X W 209 x 209 mm 8 2 x 8 2 in Scale dimensions 300 x 223 x 71 12 x 2 8 in CHAPTER 1 GETTING STARTED 1 4 SPECIFICATIONS TABLE 1 2 SPECIFICATIONS HIGH DENSITY MODELS Model V51PH3 V51PH6 V51PH15 V51PH30 Capacity x Readability 3 kg x 0 0001 6kgx0 0002kg 15kgx0 001 kg 30 kg x 0 001 kg Max x d non 3000gx0 1g 6000 g x 0 2 g 15000 gx1g 30000 gx1g approved 6 Ib x 0 0002 lb 151b x 0 001 Ib 30lbx0 001 lb 60 lb x 0 002 Ib 96 oz x 0 005 Oz 96 oz x 1 4 oz 240 oz x 01 oz 240 oz x 1 4 oz 480 oz x 0 02 oz 480 oz x 1 4 oz 960 oz x 0 05 oz 960 oz x 1 4 oz 6 lb 0 oz x 0 1 oz 15 Ib x 0 1 oz 30 Ib 0 oz x 0 1 60 Ib 0 oz x 0 1 oz 6 lb 0 oz x 1 4 oz 15 lb x 1 4 oz 30 Ib 0 oz 1 4 oz 60 Ib 0 oz x 1 4 oz 30000 30000 30000 30000 esolution Repeat
10. is mounted to the existing Frame the Overload Protection Stops must be adjusted 1 10 11 12 13 14 15 Remove the Top Housing and disconnect the flexible Membrane Switch Cable from the PC Board See Section 3 2 Disconnect the Load Cell Cable from the PCB See Figure 3 2 Remove the four screws holding the Load Cell Assembly to the Bottom Housing See Figure 3 1 Remove the screws holding the Load Cell Frame to the Load Cell and lift it off Remove the cable clamp holding the Load Cell cable to the Frame On the bottom of the Load Cell Frame remove the two screws holding the Load Cell Install the new Load Cell insert the four screws that hold it to the Frame Torque the screws as indicated in Table 4 1 Be sure the Load cell is properly aligned TABLE 3 1 LOAD CELL TORQUE SETTINGS CAPACITY TORQUE 10 N m 88 in 10 N m 88 in 10 N m 88 in 10 N m 88 in Re attach the cable clamp holding the Load Cell Cable to the Frame assembly Re install the four screws holding the Load Cell Assembly to the Bottom Housing See Figure 3 1 Re connect the Load Cell Cable to the PC Board Replace the Top Housing and connect the Membrane Switch cable to the PCB Make sure the LFT Security Slide is in the OFF position Turn on the scale The display may indicate an error code This is normal Perform a Service Calibration See Appendix B Run Performance tests See Chapter 4 CHAPTER 3
11. of the Pan Observe and record the reading Remove the mass The reading should return to Og 1 count Repeat this test three times The reading should be within 1 count of the reading recorded 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 Tables 1 1 and 1 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 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 CHAPTER 4 TESTING 4 2 4 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 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 Set the Stability setting to its lowest setting B Set
12. over charging and the scale can Power remain connected to the AC power line The Receptacle display s battery symbol will stay lit until the battery is fully charged and then it will turn off Figure 1 3 Scale Bottom The scale will automatically switch to battery operation if the power cord is removed or there is a power failure A fully charged battery can operate the scale for up to 120 hours with the backlight off During battery operation the battery symbol will light to show the current status of the battery 1 segment 25 capacity A flashing symbol indicates that the battery requires recharging The scale will automatically shut off when the battery is fully discharged CHAPTER 1 GETTING STARTED 1 5 4 Power ON With power applied press ON ZERO Off Allow 20 minutes warm up time The scale should be calibrated before use See Appendix A 1 5 4 Power OFF With the scale on press and hold the ON ZERO Off button until OFF is displayed 1 5 5 Menu Setup Programmable features of the Valor 5000 scales are contained in menus which are accessed by pressing TARGET Menu on the Display Panel The menu structure consists of three levels Main Sub menu and Menu item The Main menu contains the Sub menus and each Sub menu contains several Menu items Each Menu item contains two or more settings Use the four buttons marked with Yes No Back and Exit to navigate through the menus See Figure 1 4 For more detail on
13. press Yes C appears followed by the span calibration weight value Press No to change to an alternate span calibration weight value or place the indicated calibration weight on the scale and press Yes C appears then done and then the scale reverts to weighing mode Remove the calibration weight Figure A 1 Span Calibration Menu readings Note The calibration procedure can be canceled at any time by pressing Exit or turning the scale off APPENDIX A STANDARD CALIBRATION A 1 CALIBRATION Linearity Calibration Procedure Press TARGET Menu until CAL appears Press Yes Span appears Press No Lin appears Press Yes to begin Linear calibration Clear Pan flashes Clear the pan if necessary then press Yes C appears followed by the first calibration weight value Press No to change to an alternate first calibration weight value ore place the indicated calibration weight on the scale and press Yes C appears followed by the second calibration weight value Place the indicated calibration weight on the scale and press Yes C appears then done and then the scale reverts to weighing mode Remove the calibration weight Note The calibration procedure can be canceled at any time by pressing Exit or turning the scale off
14. the current r Geographical location flashes for example GEO 19 GE C3 Locate the Geographical Factor in Appendix C Select a number from 0 to 31 To change the Geographical factor press No until the desired GEO Factor appears then press Yes C m c3 zB r APPENDIX B THE SERVICE MENU B 5 SERVICE CALIBRATION Service calibration is used when span or linearity calibration fails or whenever a Load Cell or PC Board has been changed Using this procedure establishes a new set of parameters for the scale and new calibration data 1 When CAL appears press Yes CLEAR PAN flashes 2 Remove any material from the Pan and press Yes C appears 3 After a few seconds PLACE n kg flashes where n is the first calibration weight 4 Place the requested weight on the Pan and press Yes C appears briefly followed by PLACE kg where is the second calibration weight 5 Place the requested weights on the Pan and press Yes C appears briefly followed by DONE dun Within a few seconds the scale returns to weighing mode and displays the current weight on the Pan 6 Remove the weights from the Pan Note as it will cause the process to fail Be careful not to touch the scale or the table while calibration is in progress APPENDIX B THE SERVICE MENU B 6 Ramp Ramp is used primarily to determine if the Load Cell is damaged from causes including abuse heav
15. zero values Secondary Off Units Menu Function If scale is on Changes Enters menu long press turns scale off weighing unit mode Yes No Back Exit Accepts current Rejects current Reverts back to Immediately setting and setting or menu previous menu exits menu mode advances to the item and item Aborts next menu item advances to the calibration in next available progress item Target Setting Shifts to next Increments value Accepts current Changes sign Function digit of the active digit displayed value of displayed value CHAPTER 1 GETTING STARTED 1 5 2 OVERVIEW OF THE DISPLAY INDICATORS N La 2 ul EI LIE LIE II IST sO TABLE 1 4 DISPLAY INDICATORS Indicates that the measured value has become stable Tare indicator Symbols for weighing modes kg Kilograms g grams Ib oz Pounds Ounces Ib Pounds Ounces Fractional ounces in mode 7 Battery charging indicator 8 Pound Ounce separator 1 5 3 Power Check that the AC adapter supports the voltage in use locally Then plug the adapter into the receptacle marked Power In located on the underside of the scale The first time the scale is powered on the I internal rechargeable battery should be fully charged The scale be operated during a the charging process The battery is protected Foot Switch QC Receptacle SY against
16. 650 975 1300 1625 1950 2275 2600 2925 3250 latitude away 325 650 975 1300 1625 1950 2275 2600 2925 3250 3575 from the ERE ae equator North evation above sea level in feet or South in degrees and 1060 2130 3200 4260 5330 6400 7460 8530 9600 10660 minutes 1060 2130 3200 4260 5330 6400 7460 8530 9600 10660 11730 5 4 4 3 3 2 2 0 00 5 6 5 46 952 9552 12944 12944 15906 15906 17710 17 10 1902 19902 20 45 20 45 22 22 22 22 23964 2354 25 21 2921 26945 2645 28906 2806 29 25 2925 30 41 30 41 31 996 3156 33909 3309 34 21 34721 35 31 35 31 36 41 36 41 87950 37550 38 58 38 58 40 05 40 05 41 12 41 12 42 19 42 19 43 6 43 26 44 2 44 32 45 38 45 38 46 5 46 45 47951 47951 48 58 48 58 50 06 50 0 51 713 51 13 52 22 52 22 58 31 53 31 54 41 94 41 55752 c COON Y O c Y Y O O Ol c Y DODO OO A N DOO OOF c Y OOOO Pr C Y O CO Y BW CO PY c Y JO gt c gt Y YO GO RARA c Y JO 10
17. 800 526 0659 between 8 00 a m and 6 00 p m EST CHAPTER 5 PARTS LISTS amp DIAGRAMS 5 1 VALOR 5000 SERIES SCALES HOUSING amp INTERNAL PARTS Figure 5 1 Valor 5000 Series Scales Housing amp Internal Parts CHAPTER 5 PARTS LISTS amp DIAGRAMS 5 1 VALOR 5000 SERIES SCALES HOUSING amp INTERNAL PARTS TABLE 5 1 VALOR 5000 SERIES SCALES HOUSING amp INTERNAL PARTS Pan Support Caps 4 Load Cell Assembly includes Frame Pan CHAPTER 5 PARTS LISTS amp DIAGRAMS APPENDIX A STANDARD CALIBRATION APPENDIX A STANDARD CALIBRATION A 1 CALIBRATION Standard calibration should be performed prior to using a scale and after service Calibration can be adjusted in two ways Span and Linearity Span calibration uses two calibration points to adjust the sensitivity of the scale Linearity calibration uses three calibration points to correct for non linear weighing results See Section 4 2 for Calibration Masses required for each model Calibration is not available when the scale has been set to Legal for Trade operation To disable LFT and then restore it if necessary see Section 1 6 Note N Be careful not to touch the scale or the table while calibration is in progress as it will cause the process to fail Span Calibration Procedure Press TARGET Menu until CAL appears Press Yes Span appears Press Yes to begin Span calibration Clear Pan flashes Clear the pan then
18. LE Page No 1 1 DC CUM CA MOINS een es ee 1 2 1 2 Capacity and Readability ooooocccccoconcnnccnoncnnnonanonononanonnnnnanonnnnnnncnnononennnos 1 3 1 3 Functions of Display 1 4 1 4 o jo nn T OS UR PO ohne 1 5 1 5 Valor 5000 SIUCIBEB estirada 1 7 2 1 RE 2 2 4 1 Calibration Mass ae 1 2 4 2 lcge een ee een 4 2 4 3 Repeatability Worksheet 4 4 4 4 Linearity Test Masses 4 5 5 1 Valor 5000 V31X3 Scale Housing amp Internal Parts 5 3 5 2 Valor 5000 V31X6 Scale Housing amp Internal Parts 5 5 5 3 Valor 5000 V31XH2 Scale Housing amp Internal Parts 5 7 5 4 Valor 5000 V31XH202 Scale Housing Internal Parts 5 9 55 Valor 5000 V31XW3 Scale Housing amp Internal 5 11 5 6 Valor 5000 V31XW3 M Scale Housing Internal 5 13 DU Valor 5000 V31XW6 Scale Housing amp Internal 5 15 5 8 Valor 5000 V31XW6 M Scale Housing amp Internal Parts 5 17 TABLE NO 5 9 5 10 D 1 FIG
19. Test Equipment 99 Washington Street Depot Melrose MA 02176 Phone 781 665 1400 1 800 517 8431 Toll Free 1 800 517 8431 OHAUS SERVICE MANUAL Valor 5000 Scales TARGET SERVICE MANUAL Valor 5000 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 2008 Ohaus Corporation all rights reserved TM Registered trademark of Ohaus Corporation TABLE OF CONTENTS Page No CHAPTER 1 GETTING STARTED US MEME Pelo ERE MES 1 1 IP SSSI VICE AC c Tu 1 1 1 3 Tools and Test Equipment Required eese 1 1 A 1 2 13 Scale QP CT ANON eig 1 4 Ne CONTO Sist 1 4 1 5 2 Overview of the Display Indicators ccoonccocccoonccoccononnncnonannncnonanononocaronnnnnns 1 5 13 3 AP OWE OR zes E 1 5 D EU som ET 1 5 Made EE rS 1 6 156 1 Setup Proced ra ae 1 6 Jo Menu unse are 1 7 CHAPTER 2 TROUBLESHOOTING 2 1 VFOUIDICSHOOUNG EDI EUER 2 1 2 2 Diagnose Gude esene 2 1 22 1 2 1 CHAPTER 3 MAINTENANCE PROCEDURES Sil Preventivo Maintenance
20. URE NO gt o TABLE OF CONTENTS TITLE Page No Valor 5000 V31XW301 Scale Housing amp Internal 5 19 Valor 5000 V31XW301 M Scale Housing amp Internal Parts 5 21 Geographical Adjustment 5 D 1 LIST OF ILLUSTRATIONS TITLE Power Gonneclionand Elia 1 4 Valor o000 DISA sc 1 4 Valor 5000 1 5 EF 1 6 Scale BOUON a E 3 2 Technique for separating Top and Bottom Housing on Valor 5000 3 2 Red lock between battery 3 3 Printed Circuit Board and Display 3 4 Bottom of Valor 5000 Xtreme W with Battery Cover on 3 5 Plastic Insert and Function Label dais 3 6 Plastic Insert viewed from inside Top 3 6 oegimerntDISDIay Reese 4 1 Scale drawing of Valor 5000 Load and Weighing 4 6 Valor 5000 V31X3 Scale Housing amp Internal 5 2 Valor 5000 V31X6 Scale Housing amp Internal Parts
21. ability kg 0 0002 0 0004 0 002 0 002 Linearity kg 0 0002 0 0004 0 002 0 002 Weighing Units g kg Ib oz decimal fractional Ib oz decimal fractional oz Application Modes Weighing Checkweighing Percentage Checkweigh 3 LEDs yellow green red with configurable alert beeper Bower 9 12 VDC 0 5A 0 8A AC adaptor internal rechargeable sealed lead acid battery Battery Operating 120 hours Time Tare range To capacity by subtraction Stabilization Time Within 2 seconds Auto zero tracking Off 0 5 1 or 3 divisions Operating Temperature Range 10 to 40 14 to 104 F Storage Temperature Range 40 to 70 C 40 to 104 F Approved Temperature Range 0 to 40 C 32 to 104 F Pan Size D X W 209 x 209 mm 8 2 x 8 2 in Scale dimensions 300 x 223 x 71 12 x 2 8 in CHAPTER 1 GETTING STARTED 1 5 SCALE OPERATION This section contains information on the basic operation of the scale 1 5 1 OVERVIEW OF THE CONTROLS STABLE 0 CHECK Valor 5 JUL Hi Figure 1 1 Valor 5000 Display TABLE 1 3 FUNCTIONS OF DISPLAY CONTROLS Button Function E Yes Primary ON ZERO G N T TARGET TARE Function If scale is off Momentarily Initiates target Sets tare short press turns scale on Displays Gross setting mode Clears tare if If scale is on Net and Tare pan is empty sets
22. al 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 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 Drawings 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 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 tempe
23. and remove the Pan from the scale 2 Unscrew and remove the four Pan Support Caps from the top of the scale 3 Turn the scale over and remove the five screws which hold the Top Housing See Figure 3 1 Note that one of these is smaller and is beneath the Security Slide Load Cell screws Load Cell screws Figure 3 1 Scale Bottom CAUTION Use care in the next step as the Membrane Switch wiring is attached to the PC Board 4 Place the scale upright and carefully lift the Top Housing from the Base Housing slightly and tilt forward Reach under the Top Housing from the front and carefully disconnect the flexible Membrane Switch Cable from PC Board 5 Setthe Top Housing aside CHAPTER 3 MAINTENANCE PROCEDURES 3 3 REPLACING THE LOAD CELL Either as Assembly or as Component 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 The entire Load Cell Assembly with the Frame can be replaced or only the Load Cell itself as an individual component See Chapter 5 for parts information If it is replaced as a component the Overload Protection Stops must be adjusted See Section 3 3 2 3 3 1 Replacing the Load Cell Assembly with Frame The Load Cell is factory assembled and the Overload Protection Stops are pre adjusted There are no adjustments to be made on this assembly after installation 1 Rem
24. battery indicator on the front of the LCD display will indicate charging Remove the Top Housing See Section 3 1 Leave the Membrane Switch on the cover connected to the scale With the AC Adapter connected measure the battery voltage at the battery terminals The voltage should be approximately 6 to 7 Volts de when charging It should be approximately 6 4 Volts dc ten minutes after charging stops The scale will operate until the battery voltage drops to approximately 5 6 Volts dc NOTE If the scale operates less than 120 hours charge the battery and turn on the scale and test how long the scale operates If the scale operates less than 60 hours with no backlight the battery should be replaced This is 50 capacity 4 Table 2 4 indicates the capacity of the battery in percentage after a full charge Allow a charged battery to stand overnight without being charged and then measure the terminal voltage to see capacity of the battery If the battery requires replacement see Section 3 6 lt CHECK CHAPTER 2 DIAGNOSTIC GUIDE 2 2 4 Testing the Battery TABLE 2 4 BATTERY CAPACITY 9 ID e N gt To CO gt e Y 6 00 gt 5 e 5 E e Q 60 Residual Capacity 96 CHAPTER 2 DIAGNOSTIC GUIDE 2 2 5 Diagnosis TABLE 2 5 DIAGNOSTIC GUIDE Cannot turn on with power to scale AC adapter supplied DC input connector at the bottom of scale is defective Membrane Sw
25. ctions 2 3 and 3 4 CHAPTER 2 DIAGNOSTIC GUIDE Scale does not respond to front panel controls Membrane Switch is defective Display is not on or Main PC Board is defective or partial characters are LCD may be defective displayed Scale reads Needs calibration incorrectly Scale reading unstable Load Cell is damaged Main PC Board defective Cannot calibrate Incorrect weights LFT lock switch is in locked position software lock menu is set to ON Load Cell is defective PCB is defective Error 1 rated capacity of the scale Overload condition Needs calibration Damaged Load Cell Error 2 Pan missing Underload Needs calibration Damaged load cell The load on the Pan exceeds the Test the Membrane switch Replace if necessary lf Membrane Switch is OK test the PCB If defective replace it Test the PCB Replace PCB or LCD NOTE If the LCD shows signs of damage cracked dim or partial characters it should be replaced Perform Service Calibration See Appendix B If calibration fails see next symptom Test the Load Cell See Section 2 2 3 If defective replace See Section 3 3 Test the PCB See Section 2 2 3 If defective replace it See Section 3 4 Verify that proper weights are used Set LFT lock switch to unlocked position and or set the software lock menu to OFF See Section 1 6 Test the Load Cell See Section 2 2 3 If defective rep
26. ding the Security Slide on the bottom of the scale closed and shift the slide open See Figure 1 6 This turns LFT off by moving a menu lock switch on the PCB to the Off position See Figure 1 5 After the LFT CAL Lock setting has been turned off the scale must be inspected and sealed in accordance with local weights and measures regulations before it can be used in mode again Figure 1 5 Menu lock switch on PCB 1 6 1 Sealing the Scale When used in conjunction with the Lockout Menu and the Security Switch the scale may be sealed to prevent or detect unauthorized changes to scale settings For Legal for Trade applications set the LFT menu item to ON set the Security Slide to the On position by sliding the switch to cover the screw and then seal the scale to prevent access to the metrological parameters Seal the scale according to the local weights and measures regulations To regain access to the scale settings break the seal and set the security slide to the OFF position Figure 1 5 Security Switch Settings 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 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 Gu
27. e 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 CHAPTER 3 MAINTENANCE PROCEDURES 3 5 REPLACING THE MEMBRANE SWITCH The membrane switch is affixed to the Top Housing of the scale To replace the Membrane Switch the scale must be disassembled to gain access to the switch connections 1 Remove Top Housing See Section 3 2 CAUTION Use care in the next step as the Membrane Switch wiring is attached to the PC Board 2 Place the scale upright and carefully lift the Top Housing from the Base Housing slightly Reach under the Top Housing from the front and carefully disconnect the flexible Membrane Switch Cable from the PCB the Top Housing lift up the defective Membrane Switch if necessary carefully pry it up with a knife and gently peel it off the Upper Housing 4 Carefully clean the Top Housing Membrane Switch area removing all traces of adhesive The best method is to use a flat razor blade 5 Insert the cable from the new Membrane Switch through the hole in the Top Housing Peel off the protective film from the new Membrane Switch and carefully align and affix to the Top Hous
28. he tolerance in Tables 1 1 and 1 2 If not calibrate see Appendix A 1 and repeat the test 9 f the Scale remains out of tolerance the Load Cell may need to be replaced CHAPTER 4 TESTING 4 2 6 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 Note 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 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 2 7 Adjusting Off Center Load Figure 4 2 Off Center Load Test Weight Locations CHAPTER 4 TESTING 4 2 7 Adjusting Off Center Load If the Off Center Load OCL is excessive perform adjustment as follows Top view of Load Cell Side view of Load Cell Weighing Pan s center with points A D indicated Figure 4 3 Scale drawing of Valor 5000 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 t
29. ide 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 scale components and operation 2 2 1 Diagnosis Isolate and identify the symptom Refer to Table 2 1 Diagnostic Guide and locate the symptom Follow the suggested remedies in the order they appear Perform the indicated checks or see the appropriate section of the manual Repair or replace the defective section of the scale je Sl sem Note If more than one symptom is observed approach one area at a time and remember that the symptoms may be interrelated If there is a problem that is not covered in this manual contact Ohaus for further information 2 2 2 Testing the Membrane Switch If the scale does not turn on or menus cannot be accessed the Membrane Switch may be defective It can be tested after removing the Top Housing See Section 3 1 1 Using an Ohmmeter measure the resistance between pin 5 and each other pin on the Membrane Switch Cable See Figure 2 2 next page The readings should be infinite resistance Press each button and check that the resistance is under 50 ohms for each button Check that the Membrane Switch is not shorted to the Top Housing case Check pins 1 through 5 to the case which should be infinite res
30. ing 6 Press the Membrane Switch down uniformly Using your fingers with a cloth roll from the center of the Membrane Switch outward towards the edges to remove any air bubbles that may be trapped CAUTION N DO NOT PRESS ON THE CLEAR WINDOW AREA OR ON THE SWITCHES 7 Position the Top Housing over the Bottom Housing and connect the flexible Membrane owitch Cable to the PC Board 8 Reassemble the scale 9 Replace the Pan Support Caps and Pan on top of the scale 10 Run Performance tests See Chapter 4 CHAPTER 3 MAINTENANCE PROCEDURES 3 6 REPLACING THE BATTERY This procedure is used when it is required to change the Battery A WARNING DEATH OR SERIOUS INJURY CAN OCCUR Charge the battery only with the scale s charger Charging the battery under any other conditions may cause the battery to overheat emit hydrogen gas leak ignite or burst Operate the battery at normal temperature range as specified for the scale short the battery terminals under any conditions Do dispose of the battery in incinerators or crush or try to open Dispose of the defective battery in accordance with local regulations for lead acid type batteries Check the battery for any irregularities in appearance If there is any damage to the case such as cracks deformation or leakage replace the battery NOT charge the battery with the charger terminals reversed Remove the Top Housing See Sect
31. ion 3 2 Disconnect the wire Harness from the Battery Remove the two screws holding the Battery Holder on top of the Battery These screws are reached from underneath the scale on the Bottom Housing Lift the Battery out of the Bottom Housing Position the new Battery in the Bottom Housing Reinstall the Battery holder using the two screws Place the Battery Holder over the Battery and secure it with the two screws previously removed Attach the two battery wires with quick clips to the new Battery posts Attach the Red wire to the positive terminal on the Battery and the Black wire to the negative terminal CAUTION Dispose of the Battery according to local regulations for hazardous materials Do not incinerate crush or throw out in regular garbage containers Battery contains an acid solution CHAPTER 4 TESTING 4 1 TESTING Before and after servicing a Valor 5000 scale 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 20 minutes 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 5000 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 MODEL Span Cal Choices Linearit
32. istance 4 f any test fails the Membrane Switch is defective Replace it See Section 3 5 MEMBRANE SWITCH y ONIZERO 2 AA GNT 4 TARGET 5 COMMON Figure 2 1 Membrane Switch Cable connections CHAPTER 2 DIAGNOSTIC GUIDE 2 2 3 Checking Load Cells for Trouble This section contains three methods of testing the Load cell 1 Perform a Ramp Test See Appendix B If the Ramp Test passes continue with the rest of this procedure 2 Perform a Resistance 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 Remove the Load Cell cable connector from the PC Board Using an Ohmmeter measure Load Cell Resistance Readings on the cable See Table 2 1 If the resistance readings vary more than the table readings allow replace the Load Cell See Chapter 3 TABLE 2 1 LOAD CELL RESISTANCE READINGS in Ohms MEASUREMENT POINTS READING Pins 1 amp 4 Exe to Exe 408 10 Pins 2 amp 3 S to S 350 4 See Figure 2 2 BATTERY ADAPTER CONNECTOR EXTERNAL TARE SWITCH TEST POINTS TOP VIEW PCB EXE LOAD CELL EXE GREEN S SHIELD R IPE LEAVE INSTALLED MEMBRANE SWITCH Figure 2 2 Main Printed Circuit Board Connections TARGET COMMON
33. itch defective Main PC Board is defective Scale will not turn on Battery discharged or defective using battery power Wiring harness defective or battery clips connection broken Membrane Switch defective PCB is defective Verify connections and voltage Reconnect the ac adapter to the scale Check dc voltage on the PCB or test points as shown in Figure 2 2 Voltage should read between 9 and 14 Volts power off and above 9 Volts dc power on If voltage is not present check and replace the Harness Test the Membrane Switch See Section 2 2 Replace if necessary See Chapter 3 If the scale fails to turn on with a new Membrane Switch test the PCB If defective it should be replaced See Section 3 4 Test the battery Replace if necessary Check voltage at battery contacts first Check dc voltage at pins 1 and 3 of battery connector on the PCB See Figure 2 2 Voltage should read approximately 6 Volts dc minimum If voltage is not present at the connector disconnect the leads from the battery and make a continuity test between the connectors on the Harness to connector pins 1 and 3 on the PCB Resistance should be 0 ohms for the red lead and 0 ohms for the black lead If an open condition exists replace wiring as necessary Test the Membrane Switch Replace if necessary If the scale fails to turn on with a new Membrane Switch test the PCB If defective it should be replaced See Se
34. lace it See Section 3 3 Test the PCB See Section 2 2 3 If defective replace it See Section 3 4 Remove excess load Turn scale off then on Perform service calibration See Appendix A Test the Load Cell See Section 2 2 3 If defective replace it See Section 3 3 Replace the Pan Perform Calibration Appendix A Test the Load Cell See Section 2 2 3 If defective replace it See Section 3 3 CHAPTER 2 DIAGNOSTIC GUIDE CALE Checksum error Configuration data Needs calibration PCB defective At power up the load cell signal is outside the allowable limit Zero range error Checksum error User data menu settings Corrupt checksum error calibration Incorrect weight used Calibration error Load cell damaged PC board damaged Check capacity See Appendix B Perform Service Calibration See Appendix B Replace PCB Remove load from pan If problem persists test the Load Cell See Section 2 2 3 If defective replace it See Section 3 3 Check menu settings Perform Service Calibration See Appendix B Calibrate using correct calibration weights and in the correct order Test the Load Cell See Section 2 2 3 If defective replace it See Section 3 3 Testthe PCB See Section 2 2 3 If defective replace it See Section 3 4 CHAPTER 3 MAINTENANCE PROCEDURES 3 1 PREVENTIVE MAINTENANCE Ohaus scales are precision inst
35. ndix B 8 Run Performance tests See Chapter 4 CHAPTER 3 MAINTENANCE PROCEDURES 3 4 Replacing the Printed Circuit Board and LCD Display The Printed Circuit Board PCB is located inside the scale towards the front To replace the PCB it is necessary to disassemble the scale The LCD Display may also be replaced as a separate item if it is cracked or partial displays are shown 1 Remove the Top Housing and disconnect the flexible Membrane Switch Cable from the PC Board See Section 3 2 2 Disconnect the Load Cell Cable from the PCB See Figure 3 2 TO BATTERY ADAPTER CONNECTOR Screws holding PCB in place L4 T FUSE 1 1A 30V Y Tal 1 JUMPER MEMBRANE SWITCH Figure 3 3 PCB Connector Locations 3 Remove the connector plugs from the Battery and AC Adapter Remove the four screws holding the PCB See Figure 3 3 Lift the PCB up from the Housing Insert the replacement PCB Follow these steps in reverse order to install the new PCB Replace the Top Housing and connect the Membrane Switch cable to the PCB Make sure the LFT Security Slide is in the OFF position o NO gt Turn on the scale When self testing is completed the display may indicate an error code This is normal 9 Configure the Scale See Appendix C 10 Perform a Service Calibration See Appendix B 11 Run Performance tests See Chapter 4 Note The PCB and th
36. nected from the PCB measure voltage across pins 1 and 3 on the battery connector on the PCB See Figure 2 2 The voltage should read 1 to 3 Volts dc Connect the battery to the PCB and measure the voltage across pins 1 and 3 on the battery connector The full battery voltage should read a minimum of 6 0 Volts dc If the voltage is lower the battery may require charging or it may be defective Test the battery See Section 2 5 Perform simulator testing CHAPTER 2 DIAGNOSTIC GUIDE 2 2 3 Testing the Printed Circuit Board PCB 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 5 Volt excitation voltage applied 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 1 Disconnect power from the scale and remove the Top housing See Section 3 1 Leave the Membrane Switch connected to the scale Disconnect the battery Disconnect the Load Cell cable from connector J1 on the main PC Board See Figure 2 2 With the Simulator set to zero connect it to connector J1 using Alligator clips Connect a known good AC Adapter to the scale and co
37. nnect to a power source Turn on the scale CLEAR PAN ERROR 14 may appear This is normal Set the scale to indicate weight in kilograms kg and set the calibration value to maximum span value Adjust the Simulator to simulate 0 load 50 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 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 and the Membrane Switch connected enter the scale menu and perform a span calibration See Appendix A Follow the scale prompts When the scale indicates a given weight to be placed on the scale set the simulator to an equivalent value based on Table 2 3 For example when a span value of 6 kg for a 6 kg scale is shown the simulator should be set to 8 mV V Upon completion of calibration the PCB can be further checked using the Simulator to simulate various weight values If simulator settings and weight reading 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 CHAPTER 2 DIAGNOSTIC GUIDE 2 2 4 Testing the Ba
38. o 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 is negative file at points 1 and 2 STRAIGHT ACROSS O o 3 gt If the reading at point 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 11 Repeat 1 to 10 until within specifications 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 Hemember when filing you are weakening the beam File a little at a time CHAPTER 4 TESTING CHAPTER 5 PARTS LISTS amp DIAGRAMS This section of the manual contains exploded views for the Valor 5000 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 Ohaus Corporation www ohaus com 19A Chapin Road P O Box 2033 Pine Brook 07058 2033 USA Tel 973 377 9000 Fax 973 593 0359 In the United States call toll free
39. or 5000 Scales are listed in Tables 1 1 and 1 2 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 STANDARD DENSITY MODELS Model V51P3 V51P6 V51P15 V51P30 Capacity x Readability kg 0 0005 kg 6kgx0 001kg 15kgx0 002kg 30kgx0 005kg Max x d non 3000 g x 0 5g 6000gx1g 15000 gx 29 30000 59 approved 6 lb x 0 001 lb 15lbx0 002 Ib 30 lb x 0 005 Ib 60 Ib x 0 01 Ib 96 oz x 0 02 oz 96 oz x 1 4 oz 240 oz x 05 oz 240 oz x 1 4 oz 480 oz x 0 1 oz 480 oz x 1 4 oz 960 oz x 0 2 02 960 oz x 1 4 oz 6 lb 0 oz x 0 1 oz 15 lb x 0 1 oz 30 lb 0 oz x 0 1 60 Ib 0 oz x 0 2 oz 6 lb 0 oz 1 4 oz 15 Ib 1 4 oz 30 Ib 0 oz 1 4 oz 60 oz x 1 4 oz 6000 7500 7500 6000 Resolution Capacity x Readability 3kgx0 001kg 6kgx0 002kg 15kgx0 005kg 30 kg x 0 01 kg Max x d approved 3000 gx1g 6000 gx2g 15000 9x5g 30000 gx 10g 6 Ib x 0 002 Ib 15 Ib x 0 005 Ib 30 Ib x 0 01 Ib 60 Ib x 0 02 Ib 96 oz x 0 05 02 96 oz x 1 4 oz 240 oz x 1 oz 240 oz x 1 4 oz 480 oz x 0 2 oz 480 oz x 1 4 oz 960 oz x 0 5 oz 960 oz x 1 4 oz Approved Resolution 3000 3000 3000 3000 Repeatability kg 0 001 0 002 0 005 0 01 Linearity kg 0 001 0 002 0 005 0 01 Weighing Units g kg lb oz decimal fractional Ib oz decimal fractional oz Application Modes
40. ove the Top Housing and disconnect the flexible Membrane Switch Cable from the PC Board See Section 3 2 2 Disconnect the Load Cell Cable from the PCB See Figure 3 2 3 Remove the four screws holding the Load Cell Assembly to the Bottom Housing See Figure 3 1 4 Lift the Load Cell Assembly out of the bottom housing and replace it with a new one Install the screws in the Bottom Housing that were removed in Step 2 5 Connect the Load Cell Cable to the PCB 6 Replace the Top Housing and res nm connect the Membrane Switch A te Frame ad Cell Cap e ah cable to the PCB disconnected from PCB 7 Make sure the LFT Security Slide is the OFF position 8 Turnonthe scale The display may show an error code This is normal 1 1 iiu et z a vr 2 gt WRS NET 5 IE gt erg Or jet wt e DN ae ww N ME Tr b 9 Calibrate the scale according to the instructions in Appendix A 10 Turn the scale off then on It will go through all the self testing Figure 3 2 Valor 5000 with Top Housing off 11 Perform a Service Calibration See Appendix B 12 Run Performance Tests See Chapter 4 CHAPTER 3 MAINTENANCE PROCEDURES 3 3 1 Replacing the Load Cell Component Use this procedure to keep the existing Load Cell Frame and just replace the Load cell N Note When the new Load Cell
41. rature 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 e 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 an approved Electro Static Device CHAPTER 1 GETTING STARTED 1 3 TOOLS AND TEST EQUIPMENT REQUIRED The service shop should contain the following equipment 1 2 3 4 5 Standard hand tools Digital Voltmeter DVM Standard Electronics tool kit Grounding mat and clip Razor blades 1 4 SERVICE STRATEGY The repair method for the Valor 5000 Series Scales is direct substitution of major assemblies The available repair parts are listed and illustrated in Chapter 5 There are four major replaceable assemblies Cover Assembly with Membrane Switch Load Cell Assembly with Frame Lead Acid Rechargeable Battery and Main PC Board with LCD The Load Cell LCD and Membrane Switch may also be ordered and replaced separately This service manual contains sufficient information to isolate the problem replace the component test and restore the scale to original factory specifications 1 5 SPECIFICATIONS CHAPTER 1 GETTING STARTED Complete specifications for the Ohaus Val
42. ro Load 5096 and full scale capacities See Table 2 3 for typical readings NOTE Table 2 3 indicates typical readings Actual values can 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 with 5V Excitation Capacity 50 Load 100 Load 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 le Disconnect power from the scale and remove the Top housing See Section 3 1 Leave the Membrane Switch connected to the scale Disconnect the Battery from the PCB Connect the AC Adapter to the scale and turn the scale on Using a DVM measure the excitation voltage across pins 1 and 4 of J1 See Figure 2 2 The reading should be 5 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 Measure incoming power from the AC Adapter connector shown in Figure 2 2 The voltage should read between 9 and 14 volts with power off and above 9 Volts dc with power on With the battery discon
43. ruments and should be carefully handled stored in a clean dry dust free area and cleaned periodically Follow these precautionary steps When 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 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 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 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 Make a visual inspection for faulty connectors wiring and loose hardware CHAPTER 3 MAINTENANCE PROCEDURES 3 2 REMOVING THE TOP HOUSING Common hand tools are sufficient to disassemble the Valor 5000 scales Turn the scale off and unplug the power cord before you begin 1 Carefully lift
44. the Filter level to medium or the center of its range C Set the AZT Auto Zero Tracking to 5d or its lowest setting Do not turn it off D Set the 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 if it does not read zero 2 Using atest mass approximately half the capacity of the instrument place the mass on the center of platform Record the reading on the worksheet provided 3 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 CHAPTER 4 TESTING 4 2 4 Repeatability Test TABLE 4 2 REPEATABILITY WORKSHEET CAM Delta Reading Mean Delta x Delta 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
45. ttery The Valor 5000 contains a rechargeable 6 0 Volt 4 5 Ampere rated Lead Acid Battery A WARNING DEATH OR SERIOUS INJURY CAN OCCUR Charge the battery only with the scale s charger Charging the battery under any other conditions may cause the battery to overheat emit hydrogen gas leak ignite or burst Operate the battery at normal temperature range as specified for the scale short the battery terminals under any conditions Do dispose of the battery in incinerators or crush or try to open Dispose of the defective battery in accordance with local regulations for lead acid type batteries Check the battery for any irregularities in appearance If there is any damage to the case such as cracks deformation or leakage replace the battery NOT charge the battery with the charger terminals reversed A new battery when installed in a Valor 5000 scale will provide many years of useful service The length of service depends upon the type of use of the scale If left connected to the AC Adapter all of the time the battery receives a small charge when the battery voltage is low and service life can be many years Valor 5000 Scales can be operated for up to 120 hours per charge Battery life can be maximized by frequent charging 1 Upon receipt of the scale plug in the AC Adapter to a power source and the scale Allow the battery to charge If the battery required a charge the
46. using the menus see the Instruction Manual Yes Enters the displayed sub menu or menu item and accepts the displayed setting No Skips to the next sub menu or menu item and changes the displayed setting Back Goes back to the previous sub menu or menu item Exit Immediately exits the Menu mode Main menu Sub manu cs lt m lt r ro r Ln Pr zd a Pr E Er c EN r zd a Pr zd a Pr Figure 1 4 Valor 5000 Menu Structure CHAPTER 1 GETTING STARTED 1 6 Legal for Trade Settings Consult local weights and measures officials for regulations before placing the scale in Legal for Trade mode When the LFT menu setting is On the following conditions apply The Calibration CAL sub menu is hidden The Calibration Lock LCAL menu item is hidden The Auto Zero Tracking AZt menu item is set to 0 5 d 10 02 and P units are disabled To regain access to the locked menu settings break the seal hol
47. values and divide by 9 Calculate the Standard Deviation by applying the square root of the result from step 8 Standard Deviation 10 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 If the Scale continues failing to meet specifications the Load Cell may need to be replaced CHAPTER 4 TESTING 4 2 5 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 NOTE N 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 wey 3g _ 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 iW E Rp rem domo The difference in the weights of the test mass should be within t
48. y Cal fixed V51P3 1 2 3 kg 1 or 2 3 kg 1 3 kg V51P6 2 4 6kg 2 6kg 2 6 kg V51P15 5 10 15 kg 10 15 kg 5 15kg V51P30 10 20 30 kg 15 30 kg 10 30 kg 4 2 PERFORMANCE TESTS Accurate performance of the Valor 5000 scales is determined by a series of performance tests The displayed readings are compared with the tolerances listed in Tables 1 1 and 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 after repairs The scale must meet the requirements specified in each test as well as the specifications listed in Tables 1 1 and 1 2 Before proceeding with the following tests the scale should be calibrated See Appendix A 4 2 1 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 Figure 4 1 Segment Display 4 2 2 Load Cell Test Using RAMP To test the Load Cell using RAMP see Appendix B CHAPTER 4 TESTING 4 2 3 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 Tables 1 1 and 1 2 jn 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
49. y weights dropped on the Pan or dropping the scale The ramp function displays the duty cycle of the A D converter output to within one tenth of a percent When in the Ramp Menu placing a small weight on the Pan will cause the reading to increment slightly Placing additional weights of the same value will also increment to a greater displayed value This is normal operation A Load Cell that is damaged will be non linear as additional weights are added and might also have rapidly changing numbers In this case the Load Cell must be replaced 1 2 When RAMP appears press Yes to display the scale s ramp values With an empty Pan record the no load ramp value Place half load on the pan and record the ramp value Place a full load on the Pan and record the ramp value Subtract the no load ramp value from the half load ramp value Subtract the half load ramp value from the full load ramp value The two calculated values should be equal The ramp value should be between 20 to 60 throughout testing Values outside of this range indicate the load cell should be replaced At the end of the testing press Yes E PAND appears Disregard this display Itis not used Press No END appears Press Yes to exit and return to the weighing mode APPENDIX C GEOGRAPHICAL ADJUSTMENT VALUES APPENDIX C GEOGRAPHICAL ADJUSTMENT VALUES TABLE 0 1 GEOGRAPHICAL ADJUSTMENT VALUES MI Elevation above sea level in meters Geographical 0 325
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