User Manual
17
The measured sample must correspond to the calibration sample in substrate material properties, curvature
radius, or the more closely the measured sample matches the calibration sample, the more accurate the
measuring. In addition, curvature radius should meet the minimum value as specified in chapter 1.6.
The minimum substrate thickness and the minimum measuring areas as specified in chapter 1.6 should be
taken into account. Need to recalibrate(Zero/Multi-point) for different measured sample for higher accuracy.
To achieve high-accuracy readings, it is advisable to log calibration values several times. In this way, the gauge
will automatically establish a mean calibration value. The high-accuracy calibration is an obvious advantage
when calibrating on uneven and rough surfaces.
The point at which measurement is made should always be similar with the calibration point, especially in the
case of corners and edges of small parts.
Imp or
t
an
t
No
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e: The enclosed subs
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ra
t
es are in
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end ed for ch ecking accuracy only and no
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for calibra
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ion
purposes.
User mus
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recalibra
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t
he gaug e acc ording
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o prac
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ical
applications.
4. Calibration
User should read the chapter 3 firstly, and must recalibrate the gauge according to measured product sample.
The gauge provides zero calibration and multi-point calibration.
Zero calibration: Recommende d if measuring errors up to ± (2%+1um).
Multi-point calibration: The permitted measuring errors will be max. ± (1~2%+1um). If only one point calibration,
it is recommended if readings to be expected will be close to the calibration value. If more than one point
calibration, it is recommended for measurements on rough surfaces or for precise measurements on smooth
surfaces if thickness to be expected lies between that of calibration point.