Chapter Three: Overview Overview of Alarms
89
3. The channel’s pressure reading drops below the alarm trip point.
A. The diamond in the window disappears, but the relay remains latched.
4. Unlatch the alarm relay via the connector on the General I/O connector.
A. The alarm relay becomes unlatched.
B. The
LATCHED
legend in the window disappears.
Scenario 2: A Disconnected Sensor
In this situation, the alarm relay status is irrelevant, as is the latching state.
1. A sensor becomes disconnected.
A. The alarm audio tone goes off.
B. An
UNDERRANGE
legend temporarily appears in the upper right section of the
front panel window.
C. A
NO SENSOR
legend is displayed in the window, corresponding to one of the
four yellow channel numbers on the right side of the front panel.
D. The code E0 replaces the pressure reading in the sensor’s channel display.
2. Quiet the alarm audio tone with the [
QUIET
/
CANCEL
] key.
A. The alarm audio tone is quieted.
B. An alarm audio tone will go off again during an alarm condition, or if another
sensor becomes disconnected.
3. Reconnect the sensor.
A. The
NO SENSOR
legend in the window disappears.
B. The sensor’s pressure reading replaces the E0 code in the appropriate display.
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