ADV Service Manual P/N 83020790 A
Ohaus Corporation
www.ohaus.com
35
2. At the front of the Transducer Assembly, insert the two Shims between the Center Post and the Transducer
Base with the open slotted end in first, see Figure 4-9. The slots should be aligned so that the screw holes in
the Center post to the Transducer Base are visible.
3. Take the two Screws removed from the Platform Mounting Assembly and install them in the Center Post
through the slots in the Shims. Finger tightens the screws. This will hold the Upper and Lower Flexures Arms
in place.
4. Carefully loosen the two Screws located at the rear of the Upper Flexure Arm and the rear of the Lower
Flexure Arm. These are the screws which hold the Flexures in place. Do not touch the two rear most screws
with the nuts on top as these are the adjustment screws.
5. Fully tighten the two screws which hold the Center Post in place.
6. At the top of the Transducer Assembly, remove the two Screws and Washers which secure the Platform
Support to the Center Post.
NOTE
:
Do not remove the Upper or Lower Flexure Arms unless there is evidence of
damage to one or more of the Flexure Links.
7. To remove the Upper Flexure Arm from the Transducer Assembly, remove the four Screws and Washers,
one at each Flexure point.
8. To remove the Lower Flexure Arm from the Transducer Assembly, remove the four Screws and Washers,
one at each Flexure point.
9. Examine each Flexure Link. Each one must be perfectly straight. Replace any Flexure Link which is bent,
twisted, cracked or deformed in any manner.
10. To replace a defective Flexure Link, remove the Screw and Washer which secures the Flexure Link to the
Upper or Lower Flexure Arm. Replace as required.
11. To install Upper and or Lower Flexure Arms, perform steps 1 through 9 in reverse order.
4.4.3.2 Load Flexure Removal/Installation - Analytical
1. To remove the Load Flexure, procedures in paragraph 4.3.1 must be performed first to gain access to the
Load Flexure and to hold the Center Post in position.
2. Remove the two Screws and four Washers holding the Load Flexure in the Center Post using the 3 mm
Allen Wrench.
3. Replace Load Flexure and retaining hardware as removed. Ensure that Locking Plate is as far to the right
as possible when tightening.
4.4.3.3 Position Sensor PC Board Removal/Replacement Adjustment- Analytical
When the Position Sensor PC Board has been determined that it is defective and requires replacement, proceed
as follows:
1. Refer to paragraph 4.3.1, page 4-10 and open the balance.
2. Locate the four screws holding the Transducer Shield in place. Remove the screws.
3. Remove the Transducer Shield.
4. Remove the cable connector coming from the Main PC Board.
5. Unsolder coil cable from Position Sensor PC Board.
6. Unsolder thermistor wires from Position Sensor PC Board.
7. Remove the two screws holding the position Sensor Board from the Transducer Frame.
8. Remove the Position Sensor PC Board.