RKI Instruments M2A - Manual (Page 34)

29 M2A Transmitter Operator’s Manual
OLED display, and de-energizes the alarm 1 relay.
NOTE: 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 (above for
oxygen) 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 or toxic gas condition or an
increasing oxygen concentration 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.