8 CW90B/90XB Bench Scale Installation Manual
7. Turn the scale over and back off the overload protection screw one complete turn to provide clearance.
8. Remove the lower load cell screws.
9. Carefully turn the base plate upright to remove the loa
d cell and cable from the scale. Discard load cell.
Bottom View
Bottom load
cell screws
and washers
Overload
protection screw
Load Cell
Load cell shim
Figure 5-3. Remove Lower Load Cell Screws and Load Cell
Installing a Load Cell
Reference figures in “Removing a Load Cell,” on page 7, reversing steps, when reinstalling load cell.
1. Retrieve the bottom shim and align it, with the new load cell, to the scale base.
2. Holding the load cell and shim in place
, carefully turn the scale over and secure to base plate using lower
load cell screws and washers.
Torque bolts to 200 in-lbs.
3. Turn the scale upright. Position the spacer plate on the load cell, then place the top frame into position.
4. Screw in the upper load cell screws.
Torque bolts to 200 in-lbs.
5. Connect the load cell cable to the indicator.
6. Recalibrate the scale as described in Section 3.0 on page 5 of this manual.
7. Adjust the load cell overload
protection screws on the bottom of the scale by loading the scale to 125%
capacity. Place this weight on the top cover, centered on the platform. Use a hex wrench to screw in the
load cell overload protection screw until it touches the load cell, the back off 1/6 turn.
8. Recheck calibration.
9. To reset corner overload stop screws, load the top s
pider over one corner with approximately 30% of scale
capacity.
10. Adjust the screw under that corner to just t
ouch the top frame.
11. Place a drop of a non-permanent, high-strength locking compound such as
Loctite
®
on the thread.
12. Back screw off slightly so it is not touching the top frame.
13. Repeat for each corner.
14. Replace the top cover and re-level the scale if necessary.
Loctite is a registered trademark of Henkel Corporation, U.S.A.
(38 pages)
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