User Manual

User Manual DPM-816 PRO Page 15
These modes are useful when it is difficult to hold the device in a
fixed position. For example, when measuring on pipes, convex
and concave surfaces.
Calibration
For accurate thickness measurements, the device needs to be
calibrated. The device retains the calibration information and in
most cases you don't need to calibrate it again before every use.
Be sure to check and complete the calibration the first time you
use the device, or if you have not used it for a long time.
For the highest accuracy, it is advisable to calibrate the device
using a substrate that closely resembles the surface to be
measured (material, form, size).
For example, when measuring the coating thickness on carbon
steel and chrome steel substrates, the calibration will vary
insignificantly, but aluminum and zinc substrates will vary greatly.
Therefore it is important to calibrate.
The device has separate, independent calibrations:
Zero deviation calibration (one point of reference) and two-point
calibration are performed independently (separately) for A, M, Fe,
nFe modes, and for P mode with each measurement method
(magnetic induction and eddy current). This allows you to set up a
one-time calibration for modes A, M, Fe, nFe, for example on
carbon steel and aluminum substrates, and for P mode, chrome
steel and zinc substrates. To switch between calibrations, simply
switch between modes.