STwrench User Guide Pset
9836 4134 01 Edition 2.9 125 (326)
First, second, and third row
of yellow LEDs
Yield point is detected (within torque limits).
Activated when the torque goes over the Cycle Start value.
Increase its signal when the yield point is detected.
Activated together with the green LED, and remains active for one
second.
See the chapter Yield Point detection algorithm for the detail of the yield point algorithm.
6.7.2.2 Residual Torque/Time
This strategy evaluates the residual torque on a joint, looking for the residual point of the Torque / Time
trace.
Simply specify the torque limits within which to look for the residual point.
Since this strategy analyzes the torque trace as a function of time, it is very important that the operator
executes this operation with a single “steady” movement; the wrench automatically recognizes the
breakaway and residual point.
Torque result:
- If the residual point is detected, the result of the test is OK and the torque result is the
detected point.
- If the residual point is not detected or the torque goes over the maximum torque, the
torque result is the maximum value.
Therefore, if the maximum value falls within the limit, the torque result is still OK, but
the overall result is marked as Not OK.
Torque max
Torque min.
Torque max
Breakaway = residual
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