Monitor Power Is Off; F I E L D Testing And Troubleshooting1; F A U L T Indication #1 Cause/Solution1 - GE Bently Nevada 330400 Operation Manual

330400 and 330425 Accelerometer Operation Manual
4. Field Testing and Troubleshooting
Use the following procedures to test an installed 330400 and 330425
Accelerometer and isolate a suspected malfunction. The 330400 and 330425
Accelerometers are hermetically-sealed units with no adjustments or field
repairable components. If you determine that the accelerometer is not
functioning properly, contact the nearest Bently Nevada office for assistance.
When the 330400 and 330425 Accelerometers are used with a Bently Nevada
monitoring system, a fault may be due to an accelerometer malfunction, a
malfunction in the field wiring, a malfunction in the monitor itself, or a level of
vibration that exceeds the OK limit. Before placing a call to our service group, use
the steps below to troubleshoot the suspected problems.
4.1 Fault Indication #1 Cause/Solution
4.1.1.1 B e n t l y Nevada Monitor OK LED is off
The vibration level has exceeded the OK limit
Connect a voltmeter to the "IN" and "COM" on the SIRM terminals on the back of
the monitor rack. Measure the dc voltage. The voltage should be between -8.0
and -9.0 Vdc.

Monitor Power is off.

Check that the monitor power supply is plugged in and that the power is on.
Interconnect cable is disconnected, connected loosely, connected to the
wrong monitor or mis-wired.
Verify that the accelerometer is connected to the correct monitor and to the
correct monitor terminals. Check that the screws on the Signal Input Relay
Module are tight.
Interconnect cable is not connected or connection is loose at the
accelerometer.
Verify that the accelerometer is connected to the cable.
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