65-2649RK-CH4-4 M2A Transmitter Operator’s Manual
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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.
Fail Condition
Fail Condition Indications
The M2A indicates a fail condition for any of the following:
•
The detector wiring is disconnected or incorrectly connected.
•
The display reading is -10% of full scale or lower.
When the M2A senses a fail condition, it alerts you as follows:
•
The F LED turns on.
•
The gas reading is replaced by the
FAIL
message.
•
The fail relay de-energizes.
NOTE:
The fail alarm has a 30 second delay.
Responding to a Fail Condition
1. Verify that the detector wiring is correctly and securely connected.
Low Power Alarm
Low Power Alarm Indications
The M2A senses a low power condition when the DC power source is 9.5 volts or less.
WARNING:
While in a low power condition, the M2A is not an active gas monitor.
When the M2A senses a low power condition, it alerts you as follows:
•
The F LED turns on.
•
The message
LowPower
is indicated on the top line of the OLED display and the input voltage is displayed
on the bottom line of the OLED display.
•
The fail relay de-energizes.
NOTE:
The low power alarm cannot be cleared using the ENTER button.
