© PCE Instruments
12
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 the specifications.
The minimum substrate thickness and the minimum measuring areas as specified in the
specifications 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.
Important Note: The enclosed substrates are intended for checking accuracy only and not for
calibration purposes. User must recalibrate the gauge according to practical applications.
7
Calibration
User should read chapter 6 Factors Affecting Measurement Accuracy firstly, and must
recalibrate the gauge according to measured product sample. The gauge provid es basic
calibration, zero calibration and multi-point calibration.
•
Basic calibration: Also be the factory default calibration, can only for measurement on
even surfaces and if the measuring object has the same material, curvature, and size
as the factory provided substrates. For more details, please consult with your
supplier.
•
Zero calibration: Recommended 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.
Zero Calibration
a. Press and hold “ZERO Key” until hearing “beep...beep beep...”. The LCD will flash “ZERO”
symbol.
b. Place the probe on uncoated sample and raise it after one beep.
c. Repeat step b and c several times to obtain mean value.
d. Finished. Press “ZERO Key” to exit calibration mode.