ACTA 4000 User Guide Measuring strategies
9836 4171 01 2008-12 75 (136)
5.2.2 Static installed torque
When making post assembly control tightening with a wrench, the static installed torque measuring
strategy is preferred over peak torque measuring strategy. The ACTA finds the correct installed torque
automatically, without the user having to stop the tightening at the exact correct moment. Just pull the
wrench smoothly with a constant angular velocity until the bolt head moves and ACTA take care of the
analysis in line with what is shown in the figure below.
Static installed torque
Legend:
Number Parameter Number Parameter
1 Peak Torque 5 Torque min
2 Cycle start 6 Cycle complete
3 Installed torque 7 End time
4 Torque max
To measure the peak value also in this strategy, set controller to Peak torque. If done,
ACTA will store the peak value as the Controller Torque. Torque limits control will be
performed on this peak value as well, flagging the tightening as “bad” if outside limits.
This can be used to be sure the maximum torque for the application has not been
exceeded during the wrench check.
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