Figure 5-3: General fault levels
Depending on the type of machine being monitored, the values shown in this graph
should be multiplied by the service factors given in
Table 5-1: Service factor multiplier
Machinery type
Service factor
Single-stage Centrifugal Pump, Electric Motors, Fans
1.0
Non-critical Chemical Processing Equipment
1.0
Turbine, Turbine Generator, Centrifugal Compressor
1.6
Miscellaneous Equipment
2.0
shows the Overall Velocity thresholds for root-mean-square (RMS) velocity in
units of inches per second. Particularly, in digital acquisition systems, it is customary to
measure and calculate with RMS quantities. While it is accepted practice in the industry to
convert between RMS and peak values using the 1.4142 conversion factor, it is not
technically correct to do so except for a pure sinusoidal waveform. For this reason, the
AMS Wireless Vibration Monitor measures, calculates, and reports Overall Velocity in RMS,
and it is necessary to multiply by 1.4142 to get the corresponding peak levels if this is the
preferred format.
Table 5-2: Default velocity levels in AMS Wireless Vibration Monitor
Alert level
Velocity (in RMS)
Advise
0.14 in/s
User Guide
Overall Velocity, PeakVue, and temperature
MHM-97927-PBF
August 2020
MHM-97927-PBF, Rev 1
57
Summary of Contents for AMS Wireless Vibration Monitor
Page 1: ...User Guide MHM 97927 PBF Rev 1 August 2020 AMS Wireless Vibration Monitor User Guide ...
Page 42: ...Configuration User Guide August 2020 MHM 97927 PBF 42 MHM 97927 PBF Rev 1 ...
Page 50: ...Installation User Guide August 2020 MHM 97927 PBF 50 MHM 97927 PBF Rev 1 ...
Page 80: ...Product certifications User Guide August 2020 MHM 97927 PBF 80 MHM 97927 PBF Rev 1 ...
Page 82: ...Third party licenses User Guide August 2020 MHM 97927 PBF 82 MHM 97927 PBF Rev 1 ...
Page 85: ...User Guide MHM 97927 PBF August 2020 MHM 97927 PBF Rev 1 85 ...
