RKI Instruments M2 for 12 VDC User Manual
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M2 Transmitter Operator’s Manual, 12 V DC Operation
NOTE:
You can select normally energized (N. EN) or normally de-energized (N. DE-
EN) alarm 1 and alarm 2 relay settings in Configuration Mode. The following
sections describe the standard factory setting for these relays which is
N. DE-EN.
The fail relay is factory set as N. DE-EN and is not user-adjustable.
Alarm 1 Condition
Alarm 1 Condition Indications
When the gas reading reaches the alarm 1 setpoint, the M2 senses an alarm 1 condition.
The M2 alerts you to an alarm 1 condition as follows:
•
The A1 LED turns on.
•
The gas reading alternates with the ALARM-1 message.
•
The alarm 1 relay energizes.
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 LCD,
and de-energizes the alarm 1 relay.
NOTE:
If the ENTER button is pressed while the M2 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 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 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 LCD, and
de-energizes the alarm 2 relay.