Thickness Calibration - Sigma Metalytics PMV Pro PRO Manual

Thickness Calibration

In the event that your PRO device's onboard sensors become miscalibrated, it may be important to re-
calibrate the thickness measurement of your device. To do so, first power on the device and remove all
samples. Once the device displays the READY screen, press and hold the CAL button for 3 seconds. The
THICKNESS CALIBRATION screen will appear. Place the included calibration disk under the affected
sensor, then press the ENTER button. Leave the calibration disk under the sensor until the screen
returns to the MEASUREMENT screen.
With correct calibration, the calibration disk should be measured at about 1.60 - 1.61 mm thick. If your
device reads the calibration disk as more than 0.1 mm thinner or thicker than expected, please contact
us.
Note: This re-calibration is only rarely needed and should only be performed if the device is showing
clear signs of a thickness mis-calibration. Because of the way the PRO electronically measures the
thickness of coins based on the face of the coin, the PRO's indicated thicknesses for coins tends to be
slightly thinner than the thickness specifications published by mints and retailers.
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