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4.2.6 Multistage Rundown Evaluation and Reporting
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If a rundown cycle completes, or is terminated early while in or after the final audit stage of the PSet:
o
The overall evaluation of the rundown will be determined using the torque and angle limits
set in the final audit stage.
o
The peak torque and angle achieved during the rundown are used for the evaluation and
reported.
o
The torque and angle status, and overall result reported, will reflect this evaluation.
Note:
The fastening torque must achieve the In-Cycle torque value set in the PSet for the
rundown to be evaluated or reported.
•
If a rundown is terminated early before reaching the final audit stage:
o
The overall result of the rundown will be reported as a reject.
o
The torque and angle evaluation will be determined using the limits set in the stage that was
running when the rundown was terminated.
o
The torque and angle at the point in time when the rundown was terminated, is used for the
stage evaluation.
o
The torque and angle status reported will reflect this stage evaluation with the following
exception:
If torque and angle are both within limits of the stage that was running, or if the stage was
a non-audit stage, the torque and angle status will both be reported as low. This is done
to further indicate that the rundown terminated before reaching the final audit stage.
o
The peak torque and angle achieved during the rundown will be reported.
Note:
The fastening torque must achieve the In-Cycle torque value set in the PSet for the
rundown to be evaluated or reported.
•
Unfastening Stage special considerations:
o
Rundown Back-Off multi stage PSet (Unfastening as the last stage)
If the unfasten stage is set to ‘Non Audit’
:
•
The peak torque and angle reported from the fastening portion of the
rundown will be used for the evaluation and reported.
If the unfasten stage is set to ‘Audit’:
•
The final torque and angle in the unfastening direction, at the point in time
when the run cycle completes or is terminated, will be used for the evaluation
and reported.
•
The final torque and angle will be reported as negative in the unfastening direction.
•
If the rundown cycle is terminated before reaching the final unfastening audit
stage, the final torque and angle values will be reported as zero and the
torque and angle status will be reported as low.
o
Rundown Back-Off Rundown multi stage PSet (Unfastening as a middle stage)
The value for peak torque in the forward direction will be reset to zero when tool
begins an unfastening portion of the rundown.
If the rundown is terminated during the unfastening stage, the final torque and angle
values will be reported as zero and the torque and angle status will be reported as low.
•
Torque Averaging Stages (AC_TA and AC_TCOMP) reporting exception:
o
If a torque averaging stage fails to complete, or is the final audit stage, and the peak torque
is less than the high torque limit, the final torque reported will be the torque average during
that stage.
