RKI Instruments M2 Series User Manual
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M2 Transmitter Operator’s Manual
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. 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 or toxic gas condition
or a decreasing oxygen concentration condition.
2.
After the gas reading falls below (above for oxygen) 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
(above for oxygen) the alarm 1 setpoint.
Fail
• Disconnected or misconnected
detector wiring
• Display reading at -10% of full
scale or lower
• Defective components
• F LED is on
• FAIL message replaces
gas reading
NOTE: There is a 30 second
delay on the fail condition.
Low Power
DC power source less than 18.5 volts.
• F LED is on
• LowPower message and
actual voltage of
incoming DC power
*
1
If the M2 is in both an alarm 1 and an alarm 2 condition, both alarm LEDs are on and the
display alternates between the gas reading and the ALMS 1&2 message.
Table 5: Visual and Audible Alarm Indications
Condition
Cause
Visual Indication(s)