OHAUS Defender D30BR Service Manual
Defender bases
- dry-use (b series)
- wet-use (v series)
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- Instruction manual (8 pages) ,
- Instruction manual (8 pages) ,
- Instruction manual (7 pages)
Related Manuals for OHAUS Defender D30BR
Summary of Contents for OHAUS Defender D30BR
- Page 1 SERVICE MANUAL ™ Defender Bases – Dry-use (B Series) – Wet-use (V Series) Ohaus Corporation, 7 Campus Drive, Suite 310, Parsippany, NJ 07054 (973) 377-9000...
- Page 3 – Dry-Use (B Series) – Wet-Use (V Series) 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
LIST OF TABLES Specifications for Defender B & V Bases ..............1-3 Load Cell Resistance Readings ................4-1 Load Cell Output Readings ...................4-2 Defender B & V Bases: Parts List .................5-3 (continued next page) Ohaus Corporation www.ohaus.com Defender™ B & V Series Service Manual... - Page 6 Four Mounting Bolts that secure the Bottom Frame to the Load Cell ....3-2 Overload Stops .....................3-2 Positions A, B, C and D are Centered..............4-3 Off Center Load adjustment points................4-4 Defender B & V Bases: Housing & Internal Parts ..........5-2 Defender™ B & V Series Service Manual Ohaus Corporation www.ohaus.com...
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Page 7: Chapter 1 Introduction
CHAPTER 1 INTRODUCTION INTRODUCTION This service manual contains the information needed for diagnosis and repair of Ohaus Defender B & V Series Bases. The contents of this manual are contained in five chapters: Chapter 1 Introduction – Contains information regarding service facilities, tools and test equipment, test masses, specifications, service strategy, and the mechanical and electronic operation of the Base. -
Page 8: Tools And Test Equipment Required
7. A calibrated Torque Wrench N.m. – Ft/Lbs TEST MASSES REQUIRED The masses required to test the Ohaus Defender B & V Series Bases when connected to an Indicator must meet the requirements of ASTM Class 4 or OIML F2. Mass values 3kg to 300kg, depending on the Base model. -
Page 9: Specifications
CHAPTER 1 INTRODUCTION SPECIFICATIONS Complete specifications for the Ohaus Defender B & V Series Bases are listed in Table 1-1. When a Base has been serviced, it must meet the specifications listed in the table. Before servicing the Base, determine what specifications are not met. -
Page 10: How Load Cells Operate
HOW LOAD CELLS OPERATE The difference in the output signal before and after the mass was placed on the platform is measured, interpreted and displayed. Ohaus Corporation www.ohaus.com Defender™ B & V Series Service Manual... -
Page 11: Route Of Electrical Load Cell Input And Output
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. Defender™ B & V Series Service Manual Ohaus Corporation www.ohaus.com... - Page 12 CHAPTER 1 INTRODUCTION Ohaus Corporation www.ohaus.com Defender™ B & V Series Service Manual...
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Page 13: Chapter 2 Troubleshooting
3. Perform an Output Voltage Test: Measure the no load, 50% load and full load output. The reading should meet the Load Cell specifications. (See Chapter 4.) The Load Cell output should be very close to linear over its capacity range. – Defender™ B & V Series Service Manual Ohaus Corporation www.ohaus.com... - Page 14 CHAPTER 2 DIAGNOSTIC GUIDE Ohaus Corporation www.ohaus.com Defender™ B & V Series Service Manual...
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Page 15: Chapter 3 Maintenance And Repair Procedures
CHAPTER 3 MAINTENANCE AND REPAIR PROCEDURES PREVENTIVE MAINTENANCE Ohaus Bases should be carefully handled, stored in a clean, dry area, and cleaned periodically. Follow these precautionary steps: – When a base 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 16: Overload Stop Adjustments
3. Tighten the Jam Nut and re-check the Gap. 4. Re-adjust if necessary. 5. Cover the Platform and check for full capacity Figure 3-3. Overload Stops Ohaus Corporation www.ohaus.com Defender™ B & V Series Service Manual... - Page 17 TABLE 3-1. OVERLOAD GAP SETTINGS FOR DEFENDER B & V BASES (in mm) Model/Capacity Overload Stop (Corner) Overload Stop (Center) D30BR/30kg D60BR/60kg D60BL/60kg D150BL/150kg D150BX/150kg D300BX/300kg D30VR/30kg D60VR/60kg D60VL/60kg D150VL/150kg D150VX/150kg D300VX /300kg Defender™ B & V Series Service Manual Ohaus Corporation www.ohaus.com...
- Page 18 CHAPTER 3 MAINTENANCE AND REPAIR PROCEDURES Ohaus Corporation www.ohaus.com Defender™ B & V Series Service Manual...
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Page 19: Chapter 4 Testing
The following tests require a Digital Multimeter, an Indicator and hand tools. The Digital DC Voltmeter should have a reading range from 1 mV to 50 V full-scale. It should be capable of reading differences of one micro-volt per increment. The indicator can be either the Ohaus Defender 3000, or an equivalent commercial indicator. -
Page 20: Consistency Check
1. Using a voltmeter, measure and record the excitation voltage supplied by the Indicator. Most Ohaus indicators supply 5 volts dc for the excitation voltage. 2. Using an mV meter, measure and record the signal voltage with no load on the base. -
Page 21: Performance Tests
2. Check the variation between mass weights and indicator reading against specified Shift Tolerance in Table 1-1. Figure 4-1. Positions A, B, C and D are centered at each quarter of the base platform. Defender™ B & V Series Service Manual Ohaus Corporation www.ohaus.com... -
Page 22: 4.5.2 Adjusting Off Center Load
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 Defender™ B & V Series Service Manual... -
Page 23: 4.5.3 Full Load Test
Specification Tables 1-1 through 1-6. The Base must meet all specifications as listed. 2. If the Base fails the Full Load Test, check and set the Overload Stops. (See Section 3.3.) Defender™ B & V Series Service Manual Ohaus Corporation www.ohaus.com... - Page 24 CHAPTER 4 TESTING Ohaus Corporation www.ohaus.com Defender™ B & V Series Service Manual...
- Page 25 In all cases where a part is replaced, the base must be thoroughly checked after the replacement is made. The base MUST meet the parameters of all applicable specifications in this manual. If further technical information is needed, please contact your local Ohaus office, or: Ohaus Corporation, www.ohaus.com 7 Campus Drive...
- Page 26 CHAPTER 5 PARTS LISTS & DIAGRAMS DEFENDER B & V SERIES BASES: PARTS Figure 5-1. Defender B & V Series Bases: Parts Ohaus Corporation www.ohaus.com Defender™ B & V Series Service Manual...
- Page 27 Foot (1) When replacement parts are needed, refer to the spare part list for the model you are servicing. Parts lists are available from your local Ohaus office. To locate your local office, visit Ohaus.com. Defender™ B & V Series Service Manual...
- Page 28 CHAPTER 5 PARTS LISTS & DIAGRAMS Ohaus Corporation www.ohaus.com Defender™ B & V Series Service Manual...
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Page 29: Appendix A: Glossary
V output over full range, they will quote the milli-Volt output per volt of excitation, or in its short form, mv/V. Most Ohaus Indicators provide an excitation voltage of 5 Volts dc. - Page 30 APPENDIX A GLOSSARY Ohaus Corporation www.ohaus.com Defender™ B & V Series Service Manual...
- Page 32 *80252594* P/N 80252594 A SERVICE MANUAL: DEFENDER™ B & V SERIES BASES...
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