Maintenance & Troubleshooting; General Maintenance - GE Bently Nevada 1900/27 Operation And Maintenance Manual

4. Maintenance & Troubleshooting
This section describes how to maintain and trouble shoot your 1900/27 monitor.
Instructions on how to adjust the LCD's zero potentiometer and the 4 to 20 mA
interface's gain adjust potentiometer are included if this procedure should ever
become necessary. If you encounter a problem with the 1900/27 monitor, use the
troubleshooting table at the end of this section before you contact a Bently
nevada Product Service representative.

4.1 General Maintenance

Although the 1900/27 Vibration Monitor is a low maintenance instrument, we
recommend that you inspect the monitor every three to six months to verify that
the monitor is in good working order and that reliable machinery protection is being
provided. Inspect the following items:
• The monitor is powered up, the OK LED is on, and the LCD is displaying a
valid vibration reading.
• The electrical connections to the monitor are in good condition and have no
corrosion or loose wires.
• The weatherproof enclosure is still properly sealed and does not contain any
moisture.
• The Alert and Danger setpoints are properly set and the relay time delays
and Alert relay drive settings are correct.
During this inspection you should also exercise the self test function of the
1900/27 Vibration Monitor. Note, however, that the 4 to 20 mA interface will not
send a vibration signal during self test.
Section 4 - Maintenance & Troubleshooting
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