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Calibration Settings
Calibration and Verification
Calibration
Gage calibration is typically performed by the manufacturer or accredited lab. All
PosiTector RTR probes include a Certificate of Calibration.
Verification
Ensure that the probe has been cleaned with the included cleaning card and that the
probe has been zeroed.
Verify accuracy of the digital micrometer measuring system.
Place the PosiTector RTR Check Shim into the probe opening. The average of several
measurements should be within the combined tolerance of both the Gage and the shim.
If not, the Gage may need to be returned for service.
The check shim is specifically intended for all PosiTector RTR probes. The Gage is
designed to measure burnished replica tape within a limited measuring range and
automatically subtracts 50.8 microns (2 mils) from height measurements to account for
the incompressible polyester film. Therefore plastic shims intended for other instruments
such as coating thickness gages will not be measured properly.
Verify the optical measuring system
(PosiTector RTR-3D probes only)
Place the Peak Density Check Tape into the probe opening. The peak density (Spd)
result should be within tolerance specified on the tape. If not, the Gage may need to be
returned for service.
Ignore the peak height (H) result when using the Peak Density Check Tape.
Zero
The probe should be zeroed regularly to ensure best accuracy. The user will be
prompted to zero the probe every time the Gage is powered up. The Zero menu item
allows the procedure to be performed at more regular intervals. It is particularly useful
during long measurement sessions.