STwrench User Guide Pset
9836 4134 01 Edition 2.9 95 (326)
Specify the end-fitting tool number required for the Pset.
If the tool recognition function is used to select the Pset/Multistage
automatically, this is the end-fitting tool number which activates the Pset.
Maximum value: 100
Select Clockwise (CW) or Counterclockwise (CCW).
coefficient and Angle
correction coefficient
These parameters are used to correct the torque and angle reading when using
an extension or torque multiplier on the wrench. See Appendix A –
Calculating Torque and Angle Correction Coefficients for more information.
Normally these coefficients are stored in the TAG of the end-fitting tool (see
TAG writer); however, it is possible to specify them here (for example,
extension without RFID TAG or when using a torque multiplier on the
STwrench).
Leave the Torque Correction Coefficient set to 1, and the Angle Correction
Coefficient set to 0, if these parameters are set into the RFID TAG of the end-
fitting tool; if different values are specified, the STwrench corrects torque and
angle reading considering all of them (the two torque correction coefficients
are multiplied, while the two angle correction coefficients are added
together).
Coefficient
This parameter is active only for the Yield Point strategy, and characterizes
the joint stiffness in the linear part of the curve, as torque/angle slope in the
Nm/° measurement unit. The minimum value is 0.1, which suits also very soft
joints with a ration less than 0.1.
The default value is 0.5.
NOTE: This parameter has been introduced with ToolsTalk BLM version 7.2
and STwrench firmware 3.3. When loading .ttb files created with previous
versions, this parameter is not set properly; the desired value must be
specified before transferring the .ttb file to the STwrench.
NOTE: If the unit of measurement used is different from Nm, the Linear
slope Coefficient must be converted to Nm/° anyway.
For instance, for a joint with a stiffness of 0.6 lbf*ft/°, since 1 lbf*ft = 1.3558
Nm, the Linear slope Coefficient must be converted to:
0.6 lbf*ft/° → 0.6x1.3558 = 0.81 Nm/°
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