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Summary of Contents for OHAUS Valor 1000W
- Page 1 SERVICE MANUAL 1000W Scales Valor ™ Ohaus Corporation, 7 Campus Drive, Suite 310, Parsippany, NJ 07054 (973) 377-9000...
- Page 3 1000W 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.
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Page 5: Table Of Contents
Page No. CHAPTER 1 GETTING STARTED Introduction ......................1-1 Service Facilities ......................1-1 Tools and Test Equipment Required ................1-2 Model Numbers – Valor 1000W ................1-2 Specifications ......................1-2 Scale Operation .......................1-3 1.6.1 Overview of the Controls ...................1-3 1.6.2 Power On ......................1-4 1.6.4 Power Off ......................1-4 How Load Cells Operate ..................1-5... - Page 6 Removing screws holding top housing to the Load Cell ........3-4 Rechargeable battery ..................3-5 Segment Display ....................4-1 Scale drawing of Valor 1000W Load Cell and Weighing Pan .......4-6 Valor 1000W (V11PW3) Scales: Parts..............5-2 Valor 1000W (V11PW6) Scales: Parts ..............5-4 Valor 1000W (V11PW15) Scales: Parts ...............5-6 Valor 1000W (V11PW30) Scales: Parts ...............5-8...
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Page 7: Chapter 1 Getting Started
INTRODUCTION This service manual contains the information needed to perform routine maintenance and service on the Ohaus Valor 1000W 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 8: Tools And Test Equipment Required
TOOLS AND TEST EQUIPMENT REQUIRED 1. Common hand tools 2. Standard electronics tool kit 3. Digital Voltmeter (DVM) capable of reading from 1 mv to 50 V dc.) MODEL NUMBERS – VALOR 1000W V11PWXX Capacity in kilo: 3 = 3kg... -
Page 9: Scale Operation
Pan Size (mm/in) 250 x 180 / 9.9 x 7.1 Complete specifications for the Ohaus Valor 1000W Scales are listed in the tables. When a scale has been serviced, it must meet the specifications listed in the tables. Before servicing the scale, determine what specifications are not met. -
Page 10: Power Off
To turn the scale off, long press the button On/Off. The Valor 1000W can operate on either AC Power, with the included AC adapter, or on the internal rechargeable battery. The scale automatically switches to battery operation if power fails while the scale is on. - Page 11 HOW LOAD CELLS OPERATE continued The difference in the output signal before and after the mass was placed on the platform is taken, interpreted and displayed. Valor™ 1000W Series Service Manual Ohaus Corporation www.ohaus.com...
- Page 12 0.02mV per kg change in the load, that is, 10mV/500=0.02mV per kg. At a load of 250kg the signal voltage would thus increase by 5mV from the value measured at no load. Ohaus Corporation www.ohaus.com Valor™ 1000W Series Service Manual...
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Page 13: 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 a problem arises that is not covered in this manual, contact Ohaus Corporation for further information. 2.2.2 Checking Load Cells for Trouble 1. -
Page 14: Diagnostic Guide
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. Ohaus Corporation www.ohaus.com Valor™ 1000W Series Service Manual... -
Page 15: Load Cell Output Readings (In Mv With 5V Excitation)
Zero + 3.4 Zero + 5.9 V11PW6 / 6kg 0.6 ± 2.0 Zero ± 3.2 Zero ± 5.9 V11PW15 / 15kg V11PW30 / 30kg 0.3 ± 2.0 Zero + 2.8 Zero + 5.4 Valor™ 1000W Series Service Manual Ohaus Corporation www.ohaus.com... - Page 16 Remove the cover from the load adjustment. cell. Check the Overload Stops. (See Section 3.7.) If OK, the load cell is defective. Load Cell defective. Replace the Load Cell. (See Section 3.6.) Ohaus Corporation www.ohaus.com Valor™ 1000W Series Service Manual...
- Page 17 [Err-01] Invalid under and over limit Re-enter under and over limits settings [Ad-Lo] Incorrect calibration setting or Correct the calibration setting or calibration weight use correct calibration weight Valor™ 1000W Series Service Manual Ohaus Corporation www.ohaus.com...
- Page 18 CHAPTER 2 DIAGNOSTIC GUIDE Ohaus Corporation www.ohaus.com Valor™ 1000W Series Service Manual...
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Page 19: Chapter 3 Maintenance Procedures
5. Make a visual inspection for faulty connectors, wiring, and loose hardware. SERVICE STRATEGY All parts of the Valor 1000W are designed to be replaced rather than repaired. This includes the Main Printed Circuit Board (PCB), the Load Cell, and the cables. For an illustrated list of replaceable parts, see Chapter 5. -
Page 20: Removing/Replacing The Main Pcb
2. Turn the scale over. Remove the thirteen screws holding the two Housing covers in place. (See Figure 3-1.) 3. Remove the two housing covers. Figure 3-1. Valor 1000W Bottom with red circles indicating the positions of the screws that secure the two housing covers. Main PCB with cable... -
Page 21: Removing/Replacing The Rear Display Pcb
4. Connect the Rear Display PCB Cable to the Main PCB. Rear Display PCB connection to Main PCB Figure 3-4. Rear Display PCB (installed) with the red circles indicating the screws positions. Valor™ 1000W Series Service Manual Ohaus Corporation www.ohaus.com... -
Page 22: Removing/Replacing The Load Cell
Load Cell to the bottom housing. (See table 3-1 for bolt torque settings) 7. Reinsert the cable leads connecting the Load Cell to the PCB. (See Figure 3-2.) Ohaus Corporation www.ohaus.com Valor™ 1000W Series Service Manual... -
Page 23: Removing/Replacing The Battery
14~15Nm V11PW30 15~16Nm Removing/Replacing the Rechargeable Battery The Valor 1000W has a rechargeable battery. If it fails to recharge, replace it as follows: 1. Remove the five screws of the bottom cover, and lift off the cover. 2. Lift the battery’s front end enough to access the quick-connect tabs holding the wire leads. - Page 24 CHAPTER 3 MAINTENANCE PROCEDURES Ohaus Corporation www.ohaus.com Valor™ 1000W Series Service Manual...
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Page 25: Chapter 4 Testing
4.1.1 TEST MASSES REQUIRED The masses required to test the Ohaus Valor 1000W scales must meet the requirements of ASTM Class 4 or OIML F2 Tolerance. The mass values are listed in Table 4-1. TABLE 4-1. TEST MASS VALUES... -
Page 26: Performance Tests
CHAPTER 4 TESTING Performance Tests Accurate performance of the Valor 1000W scales is determined by a series of four performance tests. The displayed readings are compared with the tolerances listed for each test in Table 1-2. Tolerance values are expressed in counts. A one-count difference is shown in the last digit on the scale display. -
Page 27: 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™ 1000W Series Service Manual Ohaus Corporation www.ohaus.com... -
Page 28: Repeatability Worksheet
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. Ohaus Corporation www.ohaus.com Valor™ 1000W Series Service Manual... -
Page 29: Linearity Test
5. Maximum allowable change in displayed weight readings for each of the four positions can be found in Tables 1-1 and 1-2 (Specifications, page 1-2 and 1-3). If this maximum is exceeded, follow procedures in Section 4.4.5, Adjusting Off Center Load. Valor™ 1000W Series Service Manual Ohaus Corporation www.ohaus.com... -
Page 30: Adjusting Off Center Load
Side view of Load Cell Weighing Pan’s center, with points A – D indicated Figure 4-2. Scale drawing of Valor 1000W Load Cell and Weighing Pan. 1. Place the test weight in the center of the Weighing Pan. 2. Tare the balance. -
Page 31: Chapter 5 Parts Lists & Drawings
CHAPTER 5 PARTS LISTS & DRAWINGS PARTS LISTS & DRAWINGS This section of the manual contains exploded views of the Valor 1000W scales. The exploded view drawings are designed to identify the parts which can be serviced on the scale in the field. -
Page 32: Valor 1000W (V11Pw3) Scales: Parts
CHAPTER 5 PARTS LISTS & DIAGRAMS VALOR 1000W (V11PW3) SCALES: PARTS Figure 5-1. Valor 1000W (V11PW3) Scales: Parts. Ohaus Corporation www.ohaus.com Valor™ 1000W Series Service Manual... -
Page 33: Valor 1000W (V11Pw3) Scales: Parts
CHAPTER 5 PARTS LISTS & DRAWINGS TABLE 5-1. VALOR 1000W (V11PW3) SCALES: PARTS Note: For parts numbers, see your local Ohaus distributor, or visit www.ohaus.com. Valor™ 1000W Series Service Manual Ohaus Corporation www.ohaus.com... -
Page 34: Valor 1000W (V11Pw6) Scales: Parts
CHAPTER 5 PARTS LISTS & DIAGRAMS VALOR 1000W (V11PW6) SCALES: PARTS Figure 5-2. Valor 1000W (V11PW6) Scales: Parts. Ohaus Corporation www.ohaus.com Valor™ 1000W Series Service Manual... -
Page 35: Valor 1000W (V11Pw6) Scales: Parts
CHAPTER 5 PARTS LISTS & DRAWINGS TABLE 5-2. VALOR 1000W (V11PW6) SCALES: PARTS Note: For parts numbers, see your local Ohaus distributor, or visit www.ohaus.com. Valor™ 1000W Series Service Manual Ohaus Corporation www.ohaus.com... -
Page 36: Valor 1000W (V11Pw15) Scales: Parts
CHAPTER 5 PARTS LISTS & DIAGRAMS 5.4 VALOR 1000W (V11PW15) SCALES: PARTS Figure 5-3. Valor 1000W (V11PW15) Scales: Parts. Ohaus Corporation www.ohaus.com Valor™ 1000W Series Service Manual... -
Page 37: Valor 1000W (V11Pw15) Scales: Parts
CHAPTER 5 PARTS LISTS & DRAWINGS TABLE 5-3. VALOR 1000W (V11PW15) SCALES: PARTS Note: For parts numbers, see your local Ohaus distributor, or visit www.ohaus.com. Valor™ 1000W Series Service Manual Ohaus Corporation www.ohaus.com... - Page 38 CHAPTER 5 PARTS LISTS & DIAGRAMS VALOR 1000W DUAL DISPLAY (V11PW30) SCALES: PARTS Figure 5-4. Valor 1000W (V11PW30) Scales: Parts. Ohaus Corporation www.ohaus.com Valor™ 1000W Series Service Manual...
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Page 39: Valor 1000W (V11Pw30) Scales: Parts
CHAPTER 5 PARTS LISTS & DRAWINGS TABLE 5-4. VALOR 1000W (V11PW30) SCALES: PARTS Note: For parts numbers, see your local Ohaus distributor, or visit www.ohaus.com. Valor™ 1000W Series Service Manual Ohaus Corporation www.ohaus.com... - Page 40 CHAPTER 5 PARTS LISTS & DIAGRAMS Ohaus Corporation www.ohaus.com 5-10 Valor™ 1000W Series Service Manual...
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Page 41: Appendix A Standard Calibration
Press ZERO to accept the setting shown, or press M+ or TARE to move up or down to match value for specific model – see table above. D___3 5. Press ZERO to display dx (x=Zero tracking setting: 0-9 from 0.125d to Valor™ 1000W Series Service Manual Ohaus Corporation www.ohaus.com... - Page 42 Complete process in Step 8. EndCAL appears. Scale returns to weighing mode. Note: To change only the division setting (Step 2 in the calibration routine), press and hold ZERO and SELECT, then release SELECT before ZERO. Choose as in Step 2. Ohaus Corporation www.ohaus.com Valor™ 1000W Series Service Manual...
- Page 44 P/N XXXXXXXX SERVICE MANUAL: Valor 1000W SERIES SCALES...
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