20
A P P L I C A T I O N S
Calibrating Torque Wrenches & Hand Screwdrivers
To calibrate torque wrenches that are outside the range of the TorqueLab
â
, use a bench-
mounted transducer (BMX) or mount a TWX or SMX transducer in a fixture. Mount the
transducer directly to a bench and apply the torque directly to the wrench by hand, or attach the
transducer to a Mountz mechanical loader and isolate the wrench from the operator, reducing
the possibility of operator errors (highly recommended).
For manual calibration of click type wrenches use the First Peak mode on the TorqueLab
â
so
the tester will display the point at which the wrench “clicked” (First Peak) and the point when the
operator stopped pulling (Second Peak shown in the torque window). In First Peak Mode the
Torque Lab
â
will disregard any further input once the wrench has clicked. Make sure you apply
the torque slowly and smoothly (try not to shake or you may induce a false first peak). To avoid
this problem, calibrate click wrenches in Peak mode on a mechanical loader.
For dial type, screwdrivers and cam- over torque wrenches put the Torque Lab
â
in Peak mode.
You can also enter the wrench accuracy tolerance in the Torque Lab
â
's Tolerance settings
making it easier to determine a Go or No/Go condition.
