OHAUS Valor 5000 Series Service Manual
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OHAUS Valor 5000 Series Service Manual

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SERVICE MANUAL
5000 Scales
Valor
™
Ohaus Corporation 19A Chapin Road, P.O. Box 2033, Pine Brook, NJ 07058-2033 (973) 377-9000

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  • Page 1 SERVICE MANUAL 5000 Scales Valor ™ Ohaus Corporation 19A Chapin Road, P.O. Box 2033, Pine Brook, NJ 07058-2033 (973) 377-9000...
  • Page 3 Valor ™ 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.

  • Page 5: Table Of Contents

    Valor 5000 V31X3 Scale: Housing & Internal Parts...........5-2 Valor 5000 V31X6 Scale: Housing & Internal Parts...........5-4 Valor 5000 V31XH2 Scale: Housing & Internal Parts ..........5-6 Valor 5000 V31XH202 Scale: Housing & Internal Parts ..........5-8 Valor 5000 V31XW3 Scale: Housing & Internal Parts ..........5-10 Ohaus Corporation www.ohaus.com...
  • Page 6 Valor 5000 V31XW6 Scale: Housing & Internal Parts ..........5-14 Valor 5000 V31XW6-M Scale: Housing & Internal Parts .........5-16 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 Calibration......................... A-1 Appendix B SERVICE CALIBRATION Entering the Service Menu ..................
  • Page 7 Valor 5000 Display Indicators................1-5 LFT/Cal Lock Switch .....................1-6 Scale Bottom ......................3-2 Technique for separating Top and Bottom Housing on Valor 5000 ......3-2 Red lock between battery compartments ..............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 ................3-6...
  • Page 8 TABLE OF CONTENTS Valor™ 5000 Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 9: Chapter 1 Getting Started

    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 manual are contained in five chapters: Chapter 1 Getting Started – Contains information on service facilities, tools and test equipment, specifications, and the mechanical and electronic functions of the scale.

  • Page 10: Tools And Test Equipment Required

    4. Grounding mat and clip. 5. Razor blades. 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: –...

  • Page 11: Specifications

    CHAPTER 1 GETTING STARTED SPECIFICATIONS Complete specifications for the Ohaus Valor 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.
  • Page 12 0° to 40°C / 32° to 104°F Temperature Range Pan Size (D X W) 209 x 209 mm / 8.2 x 8.2 in Scale dimensions 300 x 223 x 71 mm / 9 x 12 x 2.8 in. Ohaus Corporation www.ohaus.com Valor™ 5000 Series Service Manual...

  • Page 13: Scale Operation

    CHAPTER 1 GETTING STARTED SCALE OPERATION This section contains information on the basic operation of the scale. 1.5.1 OVERVIEW OF THE CONTROLS Figure 1-1. Valor 5000 Display. TABLE 1-3. FUNCTIONS OF DISPLAY CONTROLS Button/ Function Primary ON / ZERO G/N/T...

  • Page 14: Overview Of The Display Indicators

    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. Ohaus Corporation www.ohaus.com Valor™ 5000 Series Service Manual...

  • Page 15: Power On

    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.

  • Page 16: Legal For Trade (Lft)

    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. Security Slide Figure 1-5. Security Switch Settings. Ohaus Corporation www.ohaus.com Valor™ 5000 Series Service Manual...

  • Page 17: Chapter 2 Troubleshooting

    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.
  • Page 18 TABLE 2-1. LOAD CELL RESISTANCE READINGS (in Ohms) MEASUREMENT POINTS* READING Pins 1& 4 (Exe+ to Exe–) 408 ± 10 Pins 2& 3 (S+ to S–) 350 ± 4 See Figure 2-2. Figure 2-2. Main Printed Circuit Board Connections Ohaus Corporation www.ohaus.com Valor™ 5000 Series Service Manual...
  • Page 19 Zero + 4.4 0.4 ± 1.5 Zero + 2.0 Zero + 4.0 15kg 0.2 ± 1.5 Zero ± 2.5 Zero ± 5.0 30kg 0.2 ± 1.5 Zero ± 3.0 Zero ± 6.0 Valor™ 5000 Series Service Manual Ohaus Corporation www.ohaus.com...
  • Page 20 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.) 8. Perform simulator testing. Ohaus Corporation www.ohaus.com Valor™ 5000 Series Service Manual...
  • Page 21 PCB is functional. If the scale readings vary, or do not agree with readings in Table 2-3, the Main PC Board is defective and should be replaced. (See Chapter 3.) Valor™ 5000 Series Service Manual Ohaus Corporation www.ohaus.com...
  • Page 22 Do 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.
  • Page 23 CHAPTER 2 DIAGNOSTIC GUIDE 2.2.4 Testing the Battery TABLE 2-4. BATTERY CAPACITY. 7.00 (Temperature 25° C) 6.75 6.50 6.25 6.00 5.75 5.50 5.25 5.00 Residual Capacity (%) Valor™ 5000 Series Service Manual Ohaus Corporation www.ohaus.com...
  • Page 24 Replace if necessary. PCB is defective. If the scale fails to turn on with a new Membrane Switch, test the PCB. If defective it should be replaced. (See Sections 2.3 and 3.4.) Ohaus Corporation www.ohaus.com Valor™ 5000 Series Service Manual...
  • Page 25 (See Section 3.3.) Error 2 Pan missing. (Underload) Replace the Pan. Needs calibration. Perform Calibration. (Appendix A.) Damaged load cell. Test the Load Cell. (See Section 2.2.3.) If defective replace it. (See Section 3.3.) Valor™ 5000 Series Service Manual Ohaus Corporation www.ohaus.com...
  • Page 26 Load cell damaged. Test the Load Cell. (See Section 2.2.3.) If defective replace it. (See Section 3.3.) PC board damaged. Test the PCB. (See Section 2.2.3.) If defective replace it. (See Section 3.4.) Ohaus Corporation www.ohaus.com 2-10 Valor™ 5000 Series Service Manual...

  • Page 27: Chapter 3 Maintenance Procedures

    CHAPTER 3 MAINTENANCE PROCEDURES 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.
  • Page 28 CHAPTER 3 MAINTENANCE PROCEDURES 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 and remove the Pan from the scale.

  • Page 29: Replacing The Load Cell

    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.) Valor™...
  • Page 30 12. Make sure the LFT Security Slide is in the OFF position. 13. Turn on the scale. The display may indicate an error code. This is normal. 14. Perform a Service Calibration. (See Appendix B.) 15. Run Performance tests. (See Chapter 4.) Ohaus Corporation www.ohaus.com Valor™ 5000 Series Service Manual...
  • Page 31 2.5 mm / 0.098 in 0.9 mm / 0.035 in 1.4 mm / 0.055 in 6. Reassemble the scale. 7. Perform a Service Calibration. (See Appendix B.) 8. Run Performance tests. (See Chapter 4.) Valor™ 5000 Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 32: Replacing The Printed Circuit Board And Display

    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 Valor™ 5000 Series Service Manual...
  • Page 33 7. Position the Top Housing over the Bottom Housing and connect the flexible Membrane Switch Cable to the PC Board. 8. Reassemble the scale. Replace the Pan Support Caps and Pan on top of the scale. Run Performance tests. (See Chapter 4.) Valor™ 5000 Series Service Manual Ohaus Corporation www.ohaus.com...
  • Page 34 Battery and the Black wire to the negative terminal. CAUTION: Dispose of the Battery according to local regulations for hazardous materials. not incinerate, crush or throw out in regular garbage containers. Battery contains an acid solution. Ohaus Corporation www.ohaus.com Valor™ 5000 Series Service Manual...

  • Page 35: Chapter 4 Testing

    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...

  • Page 36: Precision Test

    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.) Ohaus Corporation www.ohaus.com Valor™ 5000 Series Service Manual...

  • Page 37: Repeatability Test

    3. 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 4-2) with the ten (10) readings. Valor™ 5000 Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 38: Repeatability Worksheet

    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. Ohaus Corporation www.ohaus.com Valor™ 5000 Series Service Manual...

  • Page 39: Linearity Test

    8. The difference in the weights of the test mass should be within the tolerance in Tables 1-1 and 1-2. If not, calibrate (see Appendix A.1) and repeat the test. 9. If the Scale remains out of tolerance, the Load Cell may need to be replaced. Valor™ 5000 Series Service Manual Ohaus Corporation www.ohaus.com...

  • Page 40: Off-Center Load Test

    5. 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. Ohaus Corporation www.ohaus.com Valor™ 5000 Series Service Manual...

  • Page 41: Adjusting Off Center Load

    Weighing Pan’s center, with points A – D indicated Figure 4-3. Scale drawing of Valor 5000 Load Cell and Weighing Pan. 1. Place the test weight in the center of the Weighing Pan. 2. Tare the balance. 3. Move the weight to point A and record the reading.
  • Page 42 CHAPTER 4 TESTING Ohaus Corporation www.ohaus.com Valor™ 5000 Series Service Manual...
  • Page 43 CHAPTER 5 PARTS LISTS & 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.
  • Page 44 CHAPTER 5 PARTS LISTS & DIAGRAMS VALOR 5000 SERIES SCALES: HOUSING & INTERNAL PARTS Figure 5-1. Valor 5000 Series Scales: Housing & Internal Parts. Ohaus Corporation www.ohaus.com Valor™ 5000 Series Service Manual...
  • Page 45 CHAPTER 5 PARTS LISTS & DIAGRAMS VALOR 5000 SERIES SCALES: HOUSING & INTERNAL PARTS TABLE 5-1. VALOR 5000 SERIES SCALES: HOUSING & INTERNAL PARTS Drawing Item Description Pan Support Caps (4) Membrane Switch Top Housing Load Cell Assembly (includes Frame)
  • Page 46 CHAPTER 5 PARTS LISTS & DIAGRAMS Ohaus Corporation www.ohaus.com Valor™ 5000 Series Service Manual...
  • Page 47 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. Valor™ 5000 Series Service Manual Ohaus Corporation www.ohaus.com...
  • Page 48 Remove the calibration weight. Note: The calibration procedure can be Figure A-2. Linear Calibration Menu readings. canceled at any time by pressing Exit or turning the scale off. Ohaus Corporation www.ohaus.com Valor™ 5000 Series Service Manual...
  • Page 49 Press No to advance to the next choice or the next menu. Press Exit to exit the service menu and return to displaying the weight. Press Back to back up one step in the menu. Valor™ 5000 Series Service Manual Ohaus Corporation www.ohaus.com...
  • Page 50 6. Locate the Geographical Factor in Appendix C. Select a number from 0 to 31. GEO 16 7. To change the Geographical factor, press No until the desired GEO Factor appears, then press Yes. CAL is now displayed. Ohaus Corporation www.ohaus.com Valor™ 5000 Series Service Manual...
  • Page 51 Pan. Remove the weights from the Pan. 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™ 5000 Series Service Manual Ohaus Corporation www.ohaus.com...
  • Page 52 7. At the end of the testing, press Yes. E.PAND appears. Disregard this display. It is not used. 8. Press No. END appears. Press Yes to exit and return to the weighing mode. Ohaus Corporation www.ohaus.com Valor™ 5000 Series Service Manual...
  • Page 53 43°26′ - 44°32′ 44°32′ - 45°38′ 45°38′ - 46°45′ 46°45′ - 47°51′ 47°51′ - 48°58′ 48°58′ - 50°06′ 50°06′ - 51°13′ 51°13′ - 52°22′ 52°22′ - 53°31′ 53°31′ - 54°41′ 54°41′ - 55°52′ Valor™ 5000 Service Manual Ohaus Corporation www.ohaus.com...
  • Page 54 63°30′ - 64°55′ 64°55′ - 66°24′ 66°24′ - 67°57′ 67°57′ - 69°35′ 69°35′ - 71°21′ 71°21′ - 73°16′ 73°16′ - 75°24′ 75°24′ - 77°52′ 77°52′ - 80°56′ 80°56′ - 85°45′ 85°45′ - 90°00′ Ohaus Corporation www.ohaus.com Valor™ 5000 Service Manual...
  • Page 56 *80251139* P/N 80251139 SERVICE MANUAL: VALOR 5000 SERIES SCALES...

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