BAQ alphaDUR mini Manual page 25

After the calibration parameter have been set, the calibration can be continued
by cursor right ►.
Now, the measurements for calibration must be taken. The alphaDUR mini
sounds a beep at the end of each measurement. The probe should be lowered
evenly and steadily.
When the calibration is done, the standard deviation of the measurements will
be displayed (in units of the selected hardness scale and as percentage of the
mean value). This allows conclusions regarding the quality of the calibration. If
the standard deviation is to high, press ESC to repeat the calibration. As for
regular hardness measurements, the standard deviation of the calibration
depends on surface quality, homogeneity and correct probe handling
(perpendicular, without shaking). The standard deviation will be displayed with
1 more fractional digits than usual for the hardness scale (Rockwell scales will
usually be displayed with 1 fractional digit, Vickers, Brinell and tensile strength
without any fractional digits). The standard deviation as percentage of the mean
value will be displayed with 2 fractional digits.
When the calibration turns out satisfactory, it can be saved. Now you have to
decide if the new calibration shall replace an older one, or if the calibration
should be saved as a new one.
In the former case, you have to select the material that should be replaced.
In the second case, there are 3 alternatives:
1. The material calibration should be assigned to an existing
section. By these sections, the calibrations can be organized in a
two-level hierarchy, so that you can keep track even if lots of
calibrations are needed. E.g. ferrous materials and aluminium
alloys can be assigned to different sections.
2. If a new section should be created, first the name of the section,
then the name of the calibrated material must be entered.
MATERIAL CALIBRATION
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