User Manual

User Manual DPM-816 PRO Page 16
Keep a clean environment during calibration, as the slightest bit of
dust stuck between plastic and metal base plates may distort the
result by 5-10 µm.
Zero deviation calibration (one-point
calibration)
When to calibrate:
1. When measuring on a metal substrate without a coating, the
device will show a result greater or less than zero (depending on
the properties of the metal substrate). After calibration, the device
will display zero.
2. In cases where you need to measure deviation from a sample.
In these cases, the zero deviation calibration is done on a sample
coating and the device will use that coating as a point of reference
- "0". The device will display the difference from the sample
coating in subsequent measurements.
Zero deviation calibration procedure:
For zero deviation calibration, take a measurement of the metal
substrate without a coating, or a measurement of sample coating.
When the result is displayed, press and hold the button for
2 seconds. The display will show "CAL", which indicates a
successful calibration.