CDI Torque TORQUE SCREWDRIVERS - Manual (Page 10)

Page 7
9. If a minor calibration cannot be used to calibrate the screwdriver, perform a major
calibration.
Major Calibration Accuracy Adjustment
NOTE
A major (nose cone) adjustment is used to adjust all of the scale reading. If the reading at
20%, 60 and 100% of scale are either to high or low to the required accuracy to adjust
with a minor adjustment, a major adjustment must be used to bring the accuracy within
torque specification. If the torque wrench requires major adjustment follow steps 1
through 4.
1. Use a ¾” open-end wrench, turning it clockwise, to loosen and remove the cone nut.
2. Turn the cone to set the calibration as follows:
a.) If the reading on the tester was below the accuracy limit for the value tested turn
the cone clockwise to increase the value. Test and repeat this procedure until the
readings are within the accuracy limits or a minor adjustment could be used to
bring the wrench within the accuracy limits.
b.) If the reading on the tester was above the accuracy limit for the value tested turn
the cone counterclockwise to decrease the value. Test and repeat this procedure
until the readings are within the accuracy limits or a minor adjustment could be
used to bring the wrench within the accuracy limits.