Removing/Replacing The Load Cell - OHAUS VALOR 4000 Service Manual

CHAPTER 3 MAINTENANCE PROCEDURES
3.5

Removing/Replacing the Load Cell

A Load Cell that is even slightly bent or corroded should be replaced. The Load Cell may also
need to be replaced because of instability, or because the scale does not calibrate or repeat.
Note: The Load Cell is sold separately. (See Chapter 5.)
1. Unplug the cable leads connecting the Load Cell to the PCB. (See Figure 3-2.)
Remove the bolts that hold the
Load Cell Frame to the Load
Cell. Use a high-leverage Allen
wrench.
Note: There is a shim between
the Load Cell Frame and the
Load Cell. Be careful not to
lose it. (Applies to AMI-3.5kg
and all Zemic load cells.)
2. Turn the scale over and
remove the bolts and
washers that hold the Load
Cell to the Bottom Housing.
3. When installing the replacement Load Cell place the new load cell on the Bottom
Housing's cavity where the two Load Cell bolts are inserted. Insert the small cover
screws and tighten them.
4. Position the shim and Load Cell Frame on top of the Load Cell. Insert the bolts and
and tighten them. (See Table 3-1 for torque settings.)
5. Connect the Load Cell cables to the PCB. (See Figure 3-2.)
6. Use glue to seal the connector.
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Figure 3-4. Remove the bolts holding Frame to the
Load Cell.
3-4 Valor™ 2000/4000 Series Service Manual