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12.2 Calibration Modes
12.2.1 ZeroCal (Calibration on uncoated specimen)
When to use?
If the default calibration ex works is not accurate enough.
If the substrate has been exchanged compared with the last zero calibra-
tion.
If the probe is exposed to high mechanical stress and you want to avoid
false readings caused by deformation of the probe tip (e.g. by abrasion).
How to proceed after initiation of menu topic "ZeroCal":
The instrument will change to measurement operation in order to acquire
calibration values.
Place the probe onto the uncoated substrate. Execute some measure-
ments in order to minimize the placing inaccuracies. In each case the last
measured value can be deleted with ESC.
Fig. 15: Zero calibration
Press
if you want to confirm the ZeroCal measurements. In each case
the last measured value can be deleted with
Subsequently the instrument returns to measurement operation based on
the calibration executed for "ZeroCal".
ZeroCal will delete other possibly available calibrations (e.g. Cal on
Foil, Multipoint Cal). Therefore, after ZeroCal, please check the meas-
urement accuracy as described in section 13.2. If the measurement
accuracy isn't sufficient, you should repeat possibly required, alterna-
tive calibrations again (see section 12.2.2 ff).
Instruction Manual LEPTOSKOP 2042
1 List of all measured values acquired for
calibration
2 Current measured value with prefixed
consecutive number
3
Mean of all acquired measurements
4
Type of calibration
.
Art. No. 7423.421
33
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