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Sensor I® Expert User Manual
Torque Calibration
Torque calibration procedure described is for the 125 lb.ft. model wrench.
For other wrench models, use the following information for calibration:
Model 40: 45-450 dNm Range, 170 dNm +/-1 dNm Calibration point
Model 250: 115-330 Nm Range, 220 Nm +/-0.5 Nm Calibration point
Model 400: 140-530 Nm Range, 330Nm +/-0.5 Nm Calibration point
1. Make sure the wrench has been set to operate in the clockwise (“rit”)
direction (see Chapter 3, Left Hand Fasteners, for additional instruc-
tions).
2. With no force on the wrench, press the Reset button while in Torque
Control mode and hold until the yellow RUN light illuminates. Release
Reset. Select Setup position with the Mode Select switch.
3. Hold in the Reset button, select Custom Setup Mode #114, and turn the
mode switch to the Torque Control position.
4. Press the Window key while holding in the Reset button. "CAL" will dis-
play on the screen.
5. Release the Reset button and apply torque to the wrench equal to
approximately 100Nm. Make sure the external torque meter is showing
the dynamic torque rather than peak hold torque.
6. Wait until the meter stabilizes.
7. Turn the Parameter Adjustment Knob until the reading on the wrench
matches within ±0.1Nm of the reading on the meter.
8. Apply torque to the wrench equal to approximately 165Nm and check
that the torque readings match within the specified tolerance.