Bently Nevada 3300/50, Руководство по эксплуатации, Страница: 17 / 122

Tachometer Operation
6 MONITOR FUNCTIONS (CONT)
83870-01 •
SELF TEST - The monitor has three categories of self test: power-up, cyclic, and user-invoked.
A power-up self test, consisting of a series of basic monitor OK tests, is performed automatically
each time the monitor is turned on.
A cyclic self test is performed automatically while the monitor is operating. Errors encountered
during cyclic tests disable the monitor and flash an error code on the front panel display. If the
error is intermittent, the monitor will begin operating again, and the error codes will be stored for
retrieval during user-invoked self tests. Stored error codes are indicated by the TRIGGER OK LEDs
flashing at 5 Hz (5 times per second) provided that the monitor (or trigger) is OK.
A user-invoked test performs a power-up self test and allows error messages stored during cyclic
tests to be read and cleared, Stored errors are annunciated by flashing the TRIGGER OK LEDs
at 5 Hz and displaying the error codes on the front panel LCD display.
MONITOR OK - A MONITOR NOT OK condition resulting from failing self test will drive the system
OK relay into its NOT OK state and extinguish the front panel TRIGGER OK LEDs.
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