Instruction manual for MH & MH+M
24
Reference conditions during calibration
Air conditioning in measurement laboratory
Temperature: (20 ± 0,5) °C
Humidity: ≤ 65 %
Flatness standard
Granite table, precision class 00 according
to DIN 876 part 1
Total guaranteed flatness of 1 µm.
Control equipment for determining
measurement uncertainty of lengths
Step gauge block with nominal distance of
the measuring faces of 20 mm.
The measurement line of the step gauge
block is oriented perpendicularly to the
reference granite plate
Instrument
Equipped
with
standard
probe
with
hardprobe,
Ø5mm
(TESA
reference
00760227) and a standard probe support
(TESA reference 00760243)
Master piece
Belonging to the instrument itself, therefore
same number on it as indicated on gauge
label.
Measurements
•
The measuring face of the step gauge block, which is approximately at the same height as
the reference surface of the granite plate, is the reference point for measurements.
•
The reference point is captured once (probing down) and is valid for the following three
series of measurements.
•
For each series, the measurements of the step gauge blocks are carried out with regular
nominal distances of 20 mm (see calibration certificate).
•
The measurements are carried out with inversion of the probing direction. This means that
the measuring faces of the step gauge blocks are probed alternately up and down until the
end of the measuring range of the instrument is reached.
Schema representing an example of step gauge blocks on which BMPE measurements are carried out
