65-2640XL-04 M2A Transmitter Operator’s Manual
Chapter 4: Operation
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27
Responding to an Alarm 1 Condition
1. Follow your established procedure for a low level combustible gas condition.
2. After the gas reading falls below the alarm 1 setpoint, press the ENTER button to reset the
alarm 1 circuit. Resetting the alarm 1 circuit turns off the A1 LED, resets the OLED display,
and de-energizes the alarm 1 relay.
If the ENTER button is pressed while the M2A is in an alarm 1 condition, the A1 LED will
flash but all other indications will remain unchanged.
You cannot de-energize the alarm 1 relay until the gas reading falls below the alarm 1
setpoint.
Alarm 2 Condition
Alarm 2 Condition Indications
When the gas reading reaches the alarm 2 setpoint, the M2A senses an alarm 2 condition. The
M2A alerts you to an alarm 2 condition as follows:
•
The A2 LED turns on.
•
The gas reading alternates with the
ALARM-2
message.
•
The alarm 2 relay energizes.
NOTE:
If the M2A is in both an alarm 1 and alarm 2 condition, both the A1 and A2 LEDs will
be on, the gas reading will alternate with the
ALMS 1&2
message, and both alarm
relays will energize
.
Responding to an Alarm 2 Condition
1. Follow your established procedure for a high level combustible gas condition.
2. After the gas reading falls below the alarm 2 setpoint, press the ENTER button to reset the
alarm circuit. Resetting the alarm circuit turns off the A2 light, resets the OLED display, and
de-energizes the alarm 2 relay.
NOTE:
If the ENTER button is pressed while the M2A is in an alarm 2 condition,
the A2 LED will flash but all other indications will remain unchanged.
You cannot de-energize the alarm 2 relay until the gas reading falls below
the alarm 2 setpoint.
