Meggitt VM600 Hardware Manual

VM600 MPS hardware manual (standard version) MAMPS-HW/E 7 - 9
Edition 17 - February 2018
Shaft absolute vibration
PROCESSING MODES AND APPLICATIONS
(2) Block diagram
The absolute shaft vibration function (AS) is a two-channel function where an absolute
bearing vibration signal (AB) is added to a relative shaft vibration signal (RS). The sum of
these (gain and phase correctly set) gives the shaft absolute vibration. The original RS and
AB values are also available.
NOTE: It should be remembered that when a signal is integrated, the output signal lags
the input signal by 90° (that is, the output signal is 90° behind the input signal).
AS = AB + RS (with sensors at the same location, )
AS = AB  RS (with sensors diametrically opposed, )
Channel 1
vib. input
Figure 7-6: Block diagram showing absolute shaft vibration processing
Output 1
AB vib. value
Available rectifiers:
RMS
Mean
Peak
Peak-Peak
AC
DC
Initial
gap
Channel 2
vib. input
Broad band
Output 1
AB vib. alarm
Output 2
AB vib. alarm
Output 2
AB vib. value
Dual Output
AS vib. alarm
Dual Output
AS vib. value
Output 1
RS vib. value
Output 1
RS vib. alarm
Output 2
gap value
Output 2
gap alarm

Meggitt VM600 Specifications

General

Brand	Meggitt
Model	VM600
Category	Measuring Instruments
Language	English