Calibration; General Notes On Calibration - KARL DEUTSCH LEPTOSKOP 2042 Instruction Manual

12 Calibration

12.1 General notes on calibration

By manual zero and/or foil calibration, as described in the following chap-
ters, a high measurement accuracy can be achieved which to a great ex-
tent is not influenced by the shape and type of the substrate. For zero cali-
bration you require the uncoated substrate and for foil calibration a calibra-
tion foil of known thickness.
The calibration value is the mean value of all measurements executed.
Thus the calibration is the more accurate the more measurement have
been executed, since this, for instance, will reduce the possible influence of
any surface roughness.
When switching the instrument off, the calibration is maintained!
This means: If there was a manual calibration before switching-off it will be
used again after switch-on. This enables immediate continuation of the
measurement on the same material. However, if you are going to use dif-
ferent material after switch-on (different shape, different material, different
location of measurement) you need to re-calibrate.
With complicated geometry (e.g. round material, hollow bodies) you should
not use the ex works default calibration. In these cases you should always
execute a manual calibration. Also with non-flat material you need to cali-
brate manually.
Instruction Manual LEPTOSKOP 2042
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Art. No. 7423.421