1900/27 Vibration Monitor Operation and Maintenance Manual
16
2.7.1 Alert Relay Configuration
The Alert relay can be configured in the field to give an alarm condition from one
of four different conditions: Alert setpoint, Alert setpoint logically OR'ed with NOT
OK, NOT OK, and the Danger setpoint. Section 2.5.2 shows how to set this relay.
Table 2.8 lists the Alert relay configurations and the suggested application for each
one.
TABLE 2.8: Suggested Applications
for Different Alert Relay Configurations
Alert Relay
Driven By
Relay Enters Alarm
State When
Suggested Applications
alert setpoint
vibration level exceeds
the Alert setpoint
Notify that the machine is
vibrating at a level
approaching the Danger
setpoint
Alert setpoint
OR'ed with
OK relay
vibration level exceeds
the Alert setpoint or the
monitor is not OK
Notify that the vibration of
the machine is high or
that a fault exists with the
transducer, the transducer
wiring, or the transducer
power supply
OK relay*
the monitor is not OK
Notify that a fault exists
with the transducer, the
transducer wiring, or the
transducer power supply
Danger
setpoint *
vibration level exceeds
the Danger setpoint
Start up a spare machine
when the primary
machine is shutdown by
the Danger Relay
* The Alert setpoint is ignored in these Alert relay configurations;
however, the Alert LED will illuminate when the Alert relay is in its alarm
state.
