ADV Service Manual P/N 83020790 A
Ohaus Corporation
www.ohaus.com
34
4.4.2.7 Transducer Replacement - Precision
After the Transducer Assembly has been repaired, it is installed as follows:
1. Carefully position the Transducer in the Base.
2. Secure the Transducer to the Base with the three Screws previously removed. Make sure the
Transducer is properly aligned before tightening the screws.
3. Connect the Transducer Cable from the Main PC Board to the Transducer.
CAUTION
Do not touch any connectors on Main or Position Sensor
board.Electrostatic discharge could damage components on the PCB's.
4. Replace the Transducer Shield over the Transducer and secure with four screws.
5. Refer to paragraph 4.3.2, page 4-11 and re-assemble the balance.
6. After assembly, verify that the balance meets all specifications. Perform all tests.
4.4.3 Transducer Removal - Analytical
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. Disconnect the Transducer Cable from the Transducer.
5. At the bottom of the Base, remove the two M4 Screws, M4 Ribbed Lock Washers which secure the
Transducer Assembly. Hold the Transducer only at the Base, not by Flexure Arms while removing the screws.
6. Lift the Transducer Assembly clear of the Base.
NOTE
:
Visually inspect the Transducer Assembly for bent, cracked, or distorted
Flexures. Each Flexure should be perfectly straight. If it is determined that a
Flexure requires replacement, refer to paragraph 4.4.3.1 for the Upper
Flexure Arm and Lower Flexure Arm removal procedure.
4.4.3.1 Upper Flexure Arm and Lower Flexure Arm Removal/Installation - Analytical
CAUTION
Before the Upper or Lower Flexure Arms can be removed, the Center Post
which contains the Load Flexure must be secured to the base of the
Transducer with two screws removed from the Bottom Mounting Plate. This
is necessary to prevent further damage from occuring when trying to
remove and replace individual Flexures.
Figure 4-9. Shimming The Center Post.
1. Remove the three screws which secure Bottom Mounting Plate to Transducer Base.