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EN 7
layer thickness measuring device BB20
Indication of statistics
In the menu item LCD Statistic, you can choose between the
following indications:
Average
Maximum
Minimum
Standard deviation (Sdev.)
The selected indication appears in the bottom right corner of the
display in the statistical data indication(17).
Statistics of the measured values appear on the bottom left
corner in the display in the measured values indication(18).
To view all statistical values of the respective groups, go to the
menu and select Statisticview.
Measured value indication
To view all measured values of the respective groups, go to the
menu and select Measureview.
Automatic switch-off
The device switches off after 3 minutes of inactivity. To
deactivate automatic switch-off, go to the Options section in the
menu and select the Auto poweroff function. Select Disable and
confirm by pressing the Red(9) button.
Device calibration
Carry out a calibration before each measuring operation.
You can perform the calibration e.g. at an untreated or uncoated
spot of the object to be tested or use the set included in the
scope of delivery.
Calibration mode
1. Press the Red button(9) to open the main menu.
2. Select the Calibration menu item, then select Enable.
ðYou return automatically back to Calibration.
3. Press the Blue button(2) to return back to the start screen.
Calibration is carried out here.
ðThe following messages appear on the display:
cal zero: There is no one-point or two-point calibration.
cal1to2: There is a one-point or two-point calibration.
zeroy: There is a zero-point calibration.
Info
Please bear in mind that the device at hand is a
precision measuring device that can determine coating
thicknesses of no more than a few micrometres (1µm
is equivalent to one thousandth of a millimetre).
The surface condition of most measuring objects is
hardly ever perfectly even and homogeneous, even
though it might appear differently to the naked eye.
Observed under the microscope, even the smoothest
surface looks much like a mountain and valley
landscape. The teensiest of scratches, cavities or
contaminations can therefore already have a negative
effect on the expected measurement result, seeing as
they will also be a part of the measurement to a
greater or lesser extent. It does, however, not affect
the accuracy of the device. Even after the calibration
unexpected measurement deviations of a few
micrometres always have to be regarded in this
context.
Hence it is important to handle the supplied calibration
accessories with care to avoid scratches and dirt on
their respective surface as far as possible.
7


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