ADVENTURER+ Service Manual P/N 83020790 A
Ohaus Corporation www.ohaus.com 30
The Arm Flexure and Ratio Flexures may each be replaced independent of one another and without
disassembling the entire Transducer. To clean between the Magnet Assembly and the Force Coil, remove the
Top and Bottom Flexure Arms and Center Poast with the Load Flexure still attached (Load Flexure must be
disconnected from the Ratio Beam first). To proceed, refer to Ratio Beam Removal/Installation Instructions
4.4.2.4, starting with step 3.
For the following procedures, the Transducer should be removed from the Unit Base as described previously.
4.4.2.1 Flexure Removal/Replacement - Precision
To remove components from the Transducer, the use of a Test Fixture is required to hold the components of the
Transducer in place. Models AR153, AR223, AR323, AR423 and AR423D require test Fixture part number
923345. Models AR522, AR1502, AR2202, AR3202, AR4202, AR4202D and AR4201 require test Fixture part
number 923389.
1. Install the Test Fixture on the front of the Transducer using the six screws supplied with the fixture.
2. Remove and replace Flexures as required. Ratio Flexures and Load Flexure are accessible.
4.4.2.2 Top Flexure Arm Removal/Installation - Precision
1. Install the Test Fixture on the front of the Transducer using the six screws supplied with the fixture.
2. Remove the four screws on the Top Flexure Arm. See figure 6-2 and figure 6-4.
3. Remove the Top Flexure Arm.
4. Replace Top Flexure Arm by placing into position on the Transducer Frame and secure with the four
screws previously removed.
4.4.2.3 Bottom Flexure Arm Removal/Installation - Precision
1. Install the Test Fixture on the front of the Transducer using the six screws supplied with the fixture.
2. Remove the four screws on the Bottom Flexure Arm. See figure 6-2 and figure 6-4.
3. Remove the Bottom Flexure Arm.
4. Replace Bottom Flexure Arm by placing into position on the Transducer Frame and secure with the four
screws previously removed.
4.4.2.4 Ratio Beam Assembly Removal/Installation - Precision
1. Install the Test Fixture on the front of the Transducer using the six screws supplied with the fixture.
2. Remove the Top Flexure Arm, see paragraph 4.4.2.2.
3. Remove the Bottom Flexure Arm, see paragraph 4.4.2.3.
NOTE: In the next step, be careful as to the color and location of the wires removed. There is one Green wire,
one Brown wire and Brown and Green wires twisted together. It is suggested that a diagram be made of the
wire positions which you can refer back to when resoldering.
4. Unsolder the four Wires which connect the Ratio Beam to the Terminal Block mounted on the top of the
Load Cell Frame. The resistance measurement from the Brown/Green wire to the individual Green wire or the
individual Brown wire should be 460 ohms. The resistance reading from any wire to the frame should be open
or infinity.
5. Using a piece of tape, tape the position Sensor Board on the top and side to the frame. This is done so that
the Sensor Board can be accurately positioned back in place. Use a razor blade to cut the tape between the
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