Bently Nevada 3300/50, Руководство по эксплуатации

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• Tachometer Maintenance
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83871-01
23 I Test Alerts (Dual Setpoint Tach.) (Cont.)
6. Adjust the function generator frequency until the
Tachometer displays a n RPM reading above the
ALERT 1 over speed setpoint or below the ALERT 1
under speed setpoint.
7. Verify that the ALERT 1 LED turns on (Flashing if
the first out option is selected).
8. Verify that the ALERT 1 relay has changed state.
9. Press the RESET switch on the System Monitor and
verify that the ALERT 1 LED remains on steady.
10. Adjust the function generator frequency until the
Tachometer displays a n RPM reading above the
ALERT 2 over speed setpoint or below the ALERT 2
under speed setpoint.
11, Verify that the ALERT 2 LED turns on (Flashing if
the first out option is selected).
12. Verify that the ALERT 2 relay has changed state.
(The Relay will not change state if the Alert 2 Relay
has been Bypassed. See section 17)
13. Press the RESET switch on the System Monitor
and verify that the ALERT 2 LED remains on steady.
14. Adjust t h e function generator frequency until t h e
Tachometer displays an RPM reading below the Alert 1 and
2 over speed setpoints or above the Alert 1 and 2 under
speed setpoints.
15. Press the Reset switch on the System Monitor and verify
that the Alert 1 and 2 LEDs go off.
16. Connect ail field wiring.
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