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Operating Manual
MHM-97442
Figure 4-31: Example signal with radial vibrations
Definition of the adjustment level
Define with the following formula the minimum voltage level for the sensor adjustment.
U
Adjust
U
Adjust
U
Start
U
:
End
MB
Sensor
Distance:
Example
(2 mm measuring range) and a signal converter with an output voltage range -2 to -18 V.
Radial clearance = 0.2 mm and shaft lifting = 0.2 mm.
U
Adjust
U
Adjust
With an initial gap of 0.55 mm for the PR 6423 this corresponds to a distance of 0.95 mm
between sensor and trigger wheel.
This adjustment and a maximum output level of the measuring chain of about -21.0 V
results in a maximum signal amplitude of about 16 V.
MHM-97442, Rev. 2.06
=U
+ (Distance* (U
Start
min
:
Minimum required adjustment level
min
:
Start value of measuring chain voltage range
End value of measuring chain voltage range
:
Measuring range of the connected sensor
Radial clearance + any other possibly available radial shaft displacements
such as shaft lifting at plain bearings
(Figure
4-32) with an eddy current measuring chain consisting of a PR 6423
= -2 V+(0.4mm * (-18 V-(-2 V)))/2 mm
min
= -5.2 V
min
-U
) / MB
End
Start
Sensor
Installation and commissioning
February 2023
59
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