Brüel & Kjaer Vibro ds822 Serie Manuel page 66

4 mm displacement sensor system series ds822 ATEX
EN
Instructions
9.3.2 Properties of the measuring track
The material characteristics of the object to be measured change the static and dynamic meas-
urement recordings. In order to achieve reproducible measurements, we recommend to adjust
the displacement sensor system to the respective shaft material.
20 mm
1. for large areas of unevenness (5 x 5 mm)
Page 30 of 33
The measuring track must be at least 20 mm wide and free of scratches and
cavities.
To achieve meaningful measurement results, the following values must be
observed:
Roughness R ≤ 3.6
a
1
<5 μm
Roughness R
z, max
Please also consider the axial movement of the shaft.
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