CDI Torque TORQUE WRENCHES Micro-Adjustable Click Type - Manual (Page 9)

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3. Test the wrench three (3) times at 20% noting the accuracy error for each reading. Set
and test the wrench three (3) times at 60% and 100% of full scale noting the accuracy
error for each reading. If the readings are within the accuracy requirements for the
direction no calibration adjustment is required.
4. Test the torque wrench in the opposite direction, if required, by following steps 1
through 4 in that direction.
NOTE
The handle support MUST be at the center of the handle when the handle is adjusted to
20%, 60% of scale, and again at 100% of scale. Torque wrench readings, per industrial
(ASME B107.14M-1994) standards, have to be obtained by applying the load to the
center of the handle.
ISO6789
1. Preload the wrench by setting the wrench at 100% of full scale and operating five (5)
times in the direction of the test.
2. Reset handle to 20% of full scale. Place square drive in tester. Adjust the loading
point of the tester until the load is being applied in the center of the handle.
3. Test the wrench five (5) times at 20% noting the accuracy error for each reading. Set
and test the wrench five (5) times at 60% and 100% of full scale noting the accuracy
error for each reading. If the readings are within the accuracy requirements for the
test direction no calibration adjustment is required.
4. Test the torque wrench in the opposite direction, if required, by following steps 1
through 4 in that direction.