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MiniTest 725, MiniTest 735, MiniTest 745
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other one should be thicker than the thickness to be expected. There is no zero point to be taken
directly on the uncoated sample.
The block statistics defines a number of 5 readings per block.
6.2.3.5 Calibration method “Australian”
“AUS” is shown in the status line.
Calibration points: zero point (directly on the substrate) and on one precision standard.
Two calibration points are to be taken: one directly on the substrate (zero point) and another one
on a precision standard. The precision standard should be in the thickness range of the later object
to be measured.
The block statistics is defined for a minimum of 3 readings per block.
If coating thickness is less than threefold the value of roughness profile height, the
roughness of the substrate material must be taken into consideration.
If the uncoated rough substrate can be accessed, a two-point calibration as described
under section 6.4.3.3 should be made on the uncoated, smooth (non-blasted) and clean
calibration sample of the same geometry and material as the later measuring object.
After this, at least 10 readings should be taken on the rough (non-blasted) and uncoated
measuring object. Enter the roughness mean value as roughness value in the setting “1/3
profile height” of the current batch. The roughness value you have entered will be
subtracted automatically from the thickness reading to give you the coating thickness over
the peaks.
If there is no access to the uncoated rough substrate, the parameter “1/3 profile height”
must be set to 1/3 of the expected profile height. Example: 60 microns => Value to be set
for “1/3 profile height” 20 microns.
6.2.3.6 Calibration according to SSPC-PA2
“SSPC” is shown in the status line.
This method applies for rough substrates such as blasted or ground samples.
Case 1: The sample to be measured is completely coated (no access to the blank substrate)
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Calibration points: zero point (directly on the substrate of a calibration object) and two
further ones on two precision standards.
Calibration is made on the uncoated, smooth sample. The sample should have the same