Dr. Livingstone, I Presume WELDWISE 2400 - Manual (Page 89)

0433-INS-400 Rev. E
6-43
Displacement Calibration Utility
Displacement sensor calibration is required when a
new sensor is installed. The displacement channel
calibration procedure is basically the same as the
procedure for the voltage and force channels. A
piece of metal with known thickness less than
0.100” (or less than 4.5% of the displacement
sensor stroke) will be required as a reference. For
more information on the Displacement Input
Channel, refer to Chapter 11, Displacement
Channel Overview.
Figure 6-58 Displacement calibration fields