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SERVICE MANUAL
Defender

™

Bases

–

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.

Material in this manual is subject to change.

© Copyright 2011 Ohaus Corporation, all rights reserved.
TM Registered trademark of Ohaus Corporation.

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Содержание Defender D30BR

Страница 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...

Страница 2: ......

Страница 3: ...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 man...

Страница 4: ......

Страница 5: ...eplacing the Load Cell 3 1 3 3 Overload Stop Adjustments 3 2 CHAPTER 4 TESTING 4 1 Testing 4 1 4 2 Load Cell Resistance Checks 4 1 4 3 Calibration with an External Indicator 4 1 4 4 Consistency Check...

Страница 6: ...output 1 5 3 1 Four Mounting Bolts that secure the Top Frame to the Load Cell 3 1 3 2 Four Mounting Bolts that secure the Bottom Frame to the Load Cell 3 2 3 2 Overload Stops 3 2 4 1 Positions A B C...

Страница 7: ...preventive maintenance procedures and disassembly repair and replacement procedures Chapter 4 Testing Contains guides for operational and performance tests and adjustments Chapter 5 Drawings and Parts...

Страница 8: ...f Load Cells with connecting cable and hardware Each base contains the following basic replaceable assemblies Platform Load Cell with Connecting Cable and Down Stop and mounting hardware There is an e...

Страница 9: ...inum single point C3 MODEL V Series D30VR D60VR D60VL D150VL D150VX D300VX Construction 304 stainless steel pan and frame non slip rubber leveling feet Load Cell Protection Accuracy Class IP67 stainle...

Страница 10: ...1 1 Typical Strain Gauge Load Cell Internal PCB The strain gauges are wired into a Wheatstone Bridge Circuit See Figure 1 2 Strain Gauge Strain Gauge Force Strain Gauge Strain Gauge Printed Circuit Bo...

Страница 11: ...wer source in the Indicator and sends back a low voltage milli volt mV relative to the force applied The Load Cell signal is read by the Indicator which converts it to a numeric value and shows it vis...

Страница 12: ...CHAPTER 1 INTRODUCTION Ohaus Corporation www ohaus com 1 6 Defender B V Series Service Manual...

Страница 13: ...restrict movement causing improper operation of the Base If the Overload Stops are improperly set adjust them See Section 3 3 Check the metal surfaces of the Platform All surfaces should be parallel...

Страница 14: ...CHAPTER 2 DIAGNOSTIC GUIDE Ohaus Corporation www ohaus com 2 2 Defender B V Series Service Manual...

Страница 15: ...e base 2 Remove the Platform to inspect and clean the area beneath the Platform CAUTION DO NOT USE CHEMICAL CLEANERS OR SOLVENTS OF ANY TYPE SOME CLEANERS ARE ABRASIVE AND MAY AFFECT THE BASE S FINISH...

Страница 16: ...The Overload Stop gaps must be checked and reset if the Load Cell is replaced 1 Remove the Platform and loosen the Jam Nuts first on the four Overload Stops on the top side of the Frame then on the b...

Страница 17: ...y Overload Stop Corner Overload Stop Center D30BR 30kg 0 6 35 D60BR 60kg 0 8 0 5 D60BL 60kg 2 8 0 7 D150BL 150kg 2 2 0 4 D150BX 150kg 2 5 0 4 D300BX 300kg 4 0 5 D30VR 30kg 0 6 35 D60VR 60kg 0 8 0 5 D6...

Страница 18: ...CHAPTER 3 MAINTENANCE AND REPAIR PROCEDURES Ohaus Corporation www ohaus com 3 4 Defender B V Series Service Manual...

Страница 19: ...the four resistance elements which make up the Wheatstone Bridge there are commonly one or two resistors in the excitation lines The resistance across the excitation wires is usually the highest resi...

Страница 20: ...nd record the signal voltage at the loads shown in Table 4 2 4 Compare the measured output readings with the theoretical values from the Load Cell data See Table 4 2 TABLE 4 2 LOAD CELL OUTPUT READING...

Страница 21: ...l sections of the Base weigh within specified tolerance If the Base does not pass the Off Center Load Test verify that the Overload Stops are properly set See Section 3 1 If the Off Center Load Test c...

Страница 22: ...eight to point D and record the reading 7 If the reading at point A is negative file at points 1 and 4 AT AN ANGLE 8 If the reading at point B is negative file at points 1 and 2 STRAIGHT ACROSS 9 If t...

Страница 23: ...est the Base s full capacity according to the 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 Sto...

Страница 24: ...CHAPTER 4 TESTING Ohaus Corporation www ohaus com 4 6 Defender B V Series Service Manual...

Страница 25: ...d NOTE 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 furt...

Страница 26: ...CHAPTER 5 PARTS LISTS DIAGRAMS 5 1 DEFENDER B V SERIES BASES PARTS Figure 5 1 Defender B V Series Bases Parts Ohaus Corporation www ohaus com 5 2 Defender B V Series Service Manual...

Страница 27: ...2 Hardware Kit 3 Rubber Load Pads set of 6 6 Load Cell 8 Level Kit 9 Foot 1 When replacement parts are needed refer to the spare part list for the model you are servicing Parts lists are available fro...

Страница 28: ...CHAPTER 5 PARTS LISTS DIAGRAMS Ohaus Corporation www ohaus com 5 4 Defender B V Series Service Manual...

Страница 29: ...Over the full rated capacity of the load cell the mV output will change The amount by which it changes depends upon the resistance change in the cell and on the excitation voltage applied Since the l...

Страница 30: ...APPENDIX A GLOSSARY Ohaus Corporation www ohaus com A 2 Defender B V Series Service Manual...

Страница 31: ......

Страница 32: ...80252594 P N 80252594 A SERVICE MANUAL DEFENDER B V SERIES BASES...

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