RKI Instruments M2 Series - Manual (Page 33)

M2 Transmitter Operator’s Manual 28
Alarm 2 Condition
Alarm 2 Condition Indications
When the gas reading reaches the alarm 2 setpoint, the M2 senses an alarm 2 condition.
The M2 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 M2 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 LCD, and
de-energizes the alarm 2 relay.
NOTE: If the ENTER button is pressed while the M2 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 M2 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 M2 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.
2. If the M2 has a replaceable plug-in sensor, verify that the replaceable plug-in sensor in
the detector housing is properly installed.