MAN -
PLC
Lever Arm Tester - REV: 01
| F. Operation
14
F. Operation
F.1 Basic Operation
1. Adjust Level Sensor Actuator so sensor is just off when the arm is level.
2. Adjust the Break Sensor Pan so that the sensor is just on when the weights are sitting on the weight pad.
3. Install all upper load train components (hot coupling, hot stud, cold coupling, etc.) and specimen per test
requirements.
4. With the lever arm in the horizontal position, check balance and adjust as necessary. Loosen screws on
each side of the lever arm counterweight and adjust positioning screw on the counterweight for best lever arm
balance. Tighten position locking screws and check balance.
5. Install lower load train.
6. Adjust lower take-up stud to level the lever arm when the load is applied.
7. Using the jog buttons, adjust the weight pan so that any weights loaded will sit on the weight pad. Weight
pan loading is determined as follows:
W = (S X A) ÷ R
W = Amount of weight to be placed on weight pan
S = Specimen stress required (weight per cross-sectional area)
A = Specimen cross-sectional area
R = Lever arm ratio
NOTE: Any extra tare weight used to provide lever arm balance for the lower ratio on a
dual ratio lever arm is not to be included in the weight pan calculation.
8. Apply weights to the weight pan.
9. Set the “Unload Time” so that the weights sit down on the weight pad and there is enough slack to take off
the samples and load train.
10. Set the “Process Time” for the specification you are testing to.
11. Press the “Start” button.
12. At completion of test, the system will unload the weights.
