Section IV. Monitor Display
after the unit has been turned on for a set period to allow the readings time to come up to their
This message is similar to UNIT NOT OPERATING, except that the unit being monitored is now
on, but that the alarm is not yet armed. Digital information is displayed on the right margin
during this time. An example of how these messages would appear follows; the engine is off,
and the message on the lube oil pressure bar shows UNIT NOT OPERATING. When the engine
is started, the messages changes to ALARM DISABLED, and the critical pressure measurements
are displayed digitally on the right margin. This message will be replaced by the bar when the
arming delay has expired, and the alarm setpoints will be active.
ALARM DISABLED - OVER RANGE
ALARM DISABLED - UNDER RANGE
These messages show the alarm disabled status with the correct over range/underrange
INPUT BOARD FAILURE
This message is displayed when the PMS II detects that the Input Board has stopped sending
information to the Process and Display Card. This message will always be displayed as an
alarm on the bar of every sensor, and will stay until the Input Board has righted itself or has been
repaired. Since it is a monitoring system alarm as opposed to an out of tolerance indication from
a monitored point, it will not appear as a blinking display, and does not require acknowledgment.
This message is displayed when the input board has detected an open thermocouple. This is a
monitoring system alarm, and will be displayed the same as an Input Board failure.
Totalizers are quantitative measurement displays without the bar format. These displays can be from 1 to 8
digits (up to 99,999,999) with leading zeroes suppressed. Several can be displayed on one line. A totalizer
is an accumulated count of events. The kinds of data that typically would be displayed as a totalizer are
gallons of fuel consumed or hours of engine operation. Totalizers can be deactivated (turned off) by the
operator using the Edit Mode (see VI.D.2.c.). When a totalizer has been deactivated, the number field will be
replaced by IX's to signify that the totalizer is no longer counting.
Switch Formats (Fig. 6)
PMS II Operator's Instructions