7. Calibration
© ElektroPhysik
MiniTest 2500 - MiniTest 4500
35 of 73
7.7.3 Elimination of dielectric interferences of the coating material
Place the sensor on the coated sample avoiding any kind of metal support! Press ZERO/
key for
several seconds.
Note
:
The automatic compensation of temperature related interferences is now disabled. In case of
changes in working temperature, repeat the calibration if necessary.
7.8 N100 Sensor
For coating or wall thickness measurement with the N100 probe, the base material can be of
ferrous or non-ferrous metal.
The base must be a minimum 300x300 mm. With smaller areas, the measuring tolerance will be
greater. For minimum error the following is recommended:
1.
For calibration choose a spacer whose thickness is similar to the expected coating or wall
thickness, respectively (see following calibration principle).
2.
Make a two point calibration (7.3) with two spacers. Here the expected thickness should lie
between that of the two spacers.
3.
Switch the gauge on. The gauge automatically switches to
“Continuous Mode“. This mode
will be of advantage when measuring with this probe. The
“Continuous Mode“ will be
indicated by 3 strokes flashing (- - -) in the area of the measuring unit (µm, mm, cm).
Readings beyond the measuring range will be indicated by 3 steady strokes (- - -).
4.
After the gauge has been switched on, the display will show
“INF“ and “Sensor in Air“. Hold
the sensor away from any kind of metal and press the key ZERO/
key for several
seconds.
5.
To switch to
“Single measurement mode“ press „Auto FN/ Cont“
for several
seconds.
7.8.1 Standardization (Acquisition of Infinite Value)
Hold the sensor in the air and press ZERO/
key for several seconds.
14.
15.
ZERO key
lange drücken
Press ZERO key for
several seconds
1.
2.