immediately. The final reading derives from the statistical calculation and from the guaranteed tolerance levels
of the gauge. T(coating thickness)=M(mean value)
±S(
standard deviation)
±A(
measuring accuracy).
3
.
Factors of Affecting Measurement Accuracy
User
needs
to
know
the
factors
of
affecting
measurement accuracy before using the gauge. The factors are
listed as below.
Principle
Factors
Magnetic Eddy
Current
Magnetic
properties
Electrical
properties
Curvature
radius
Substrate
thickness
Size
of
measuring area
Position and shape
Surface roughness
Adhesive
substances
Strong
magnetic field
Temperature
and
humidity
Measuring operations
Low
battery
Sample
deformed
Probe
wear
Recommendations
Need to calibrate
Clean probe and sample
Recalibrate at the same environment conditions
Read the chapter 2.2
Replace
the
battery
Consult with suppler
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
√
Reference the chapter 1
.
6, and need to calibrate
Be away from strong magnetic field
Need to calibrate
Avoid
to
measure on too soft or too thin material
Reference the chapter 1
.
6, and need to calibrate
Reference the chapter 1
.
6, and need to calibrate
16