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Brüel & Kjær Vibro
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Instruction VC-1800 Series
Vibrocontrol 1870 -
Vibration Measurement and Axial Position
EN
UNRESTRICTED DOCUMENT
7.2
VIBROCONTROL 1870
– Axial Shaft Position
Specific setting for VIBROCONTROL 1870
- One channel
– axial position (terminals 21 & 22)
PLEASE NOTE:
For VIBROCONTROL 1850 & 1860, this measurement channel (terminal 21 & 22) is used for
monitoring process variables.
The setting of parameters for monitoring the axial shaft position can be carried out for the
VIBROCONTROL 1870 with the Compact Setup software for channel 5 (process 1):
A vibration displacement sensor can be connected for monitoring the axial position
(terminals 21 and 22).
The gap voltage should be adjusted within a range from -2 to -18 V DC.
•
For monitoring the axial position in both direction (towards and away from the sensor).
Ideally the sensor positioning should be close to -10 V DC to allow a maximum measuring range of
relative shaft vibration (in this case +1 mm and
–1 mm).
•
For monitoring axial shaft position in one measurement direction only, the GAP voltage should be
close to either -2 V DC or -18 V DC.