Kett LE-330J, Operating Manual

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14
Using probe Using probe adapter
for carved probe
Measuring Range Adjustment point ( Electromagnetic )
0~50
µ
m Iron substrate 10
µ
m 25
µ
m 50
µ
m
50~500
µ
m Iron substrate 50
µ
m 100
µ
m 500
µ
m
500~1500
µ
m Iron substrate 500
µ
m 1000
µ
m 1500
µ
m
Measuring Range Adjustment point ( Eddy Current )
0~50
µ
m
Aluminum substrate
10
µ
m 25
µ
m 50
µ
m
50~300
µ
m
Aluminum substrate
50
µ
m 100
µ
m 300
µ
m
300~800
µ
m
Aluminum substrate
350
µ
m 500
µ
m 800
µ
m
4. Using the probe
The probe features a 1-point contact, fixed pressure design
which ensures fixed load applied the chip on the tip the
probe. As shown in the diagram, grip the probe near the
tip and press it against the measurement surface so that
it is perpendicular to the surface. To make the next
measurement, lift the probe tip at least 10mm from the
measurement surface and then press it down again.
• The probe adapter can be used to obtain stable, reliable measurements
when measuring coatings on curved surfaces such as pipes , etc., or
when making continuous measurements on a flat surface.
3. Adjustment preparation
Adjustments must be made attempting to make
measurements. However, measurement calibrations are
stored in the unit’s computer memory, therefore new
adjustments are not required if the sample to be measured
has been measured previously. In this case, the previous
adjustments can be recalled from memory.
1
A standard "substrate" of the same material,shape and
thickness as the sample to be measured is used to make
calibration adjustments. Have the standard substrate ready
before beginning the adjustment procedure.
• Use bare standard substrates which are free of coatings such as plating
or paint. Standard substrates of this type are referred to as "zero foils" in
this manual.
2
In order to obtain the most accurate precise measurement
results possible, adjustments are performed with zero foils
and standard foils (samples of known thickness) using
the Standard Foil 4-point Adjustment Method.
• Refer to the chart to select a set of 3 standard foils appropriate for making
adjustments for the thickness of the coating to be measured.
<Standard Foil Combination Example>
• The supplied standard foil values will not necessarily be exactly the same
as those indicated in the chart. Instead, standard plates with actually
measured values close to these values are supplied.
• An attached standard board is used for an easy accuracy check.
It attaches in the point of
a probe with an adapter.
Furthermore, a screw is
tightened.