EMA Thickness gauge EM4000. User Manual
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The device functionality check must be carried out in accordance with the
instructions in the “Description of operations with the device” section and using a test
sample from the delivery kit or another test sample that has the required certificate.
The health check is performed in the following order:
1.
Calibrate the instrument using a test sample;
2.
Measure the thickness of the test sample. The measured value of the sample
thickness should not differ from the actual value (10 mm) by more than 0.04
mm.
Determination of measurement error
Determination of the measurement error is performed using a set of samples
made from one workpiece in the following order:
1.
Place the device on a 2 mm thick test sample;
2.
Calibrate the device using a known thickness calibration of the test sample;
3.
Take five measurements of the thickness at five different points of the test
sample with a thickness of 2 mm;
4.
Determine the maximum measurement error ∆ by the formula:
∆ = max(
H
i
–
H
s
)
where
H
i
is a measurement result;
H
s
is a sample thickness;
5.
Repeat the steps specified in points 1–4 for test samples with a thickness of
10 and 60 mm.
The verification results are considered positive if the obtained value of the
instrument error for all test samples does not exceed ±0.08 mm.
