Installing The Incal Weight Arm - OHAUS PA64 Service Manual

CHAPTER 3 MAINTENANCE PROCEDURES

3.3.32 Installing the InCal Weight Arm

Note: Not all block style Load Cells have a Weight Arm as shown. If the Load Cell does
not have this style Weight Arm, proceed to Step 7 and insert second Centering Pin.
Carefully slide the InCal Weight Arm into position. (See Figures 3-146 and 3-147.)
1.
Figure 3-146. InCal Weight Arm before insertion.
2. Be sure the notch at the end of the Weight Arm aligns with the pin (inserted in Step 7
on the previous page) through the Ratio Beam's screw holes..
3. Gently lift the Ratio Beam and insert a second Centering Pin in the InCal Weight Arm
near the Magnet. (See Figure 3-148.)
Figure 3-148. Weight Arm must be lifted slightly to insert Centering Pin.
Do not use tools in this step.
4.
Install the screws, washers and
nuts for the InCal Weight Arm.
Work gently, to avoid stressing the
Load Cell's internal flexures.
5. After installing the screws, washers
and nuts by hand, hold the screw
head with a screw driver while
tightening the nuts for the InCal
Weight Arm. (See Figure 3-149.)
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InCal Weight Arm
Figure 3-147. Inserting InCal Weight Arm.
Tighten Nut
Figure 3-149. Proper method for tightening
nuts while holding screw head stationary.
3-50 Pioneer™ Balances Service Manual
InCal Weight Arm
InCal Weight Arm
Hold Screw