AMC-1ACOs One Channel CO Monitor with DSI
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6
PREVENTIVE MAINTENANCE
This section covers all aspects of the AMC-1ACOs. First, a description of general maintenance
is given followed by a verification of operation and sensor replacements.
6.1 GENERAL
The monitor unit should be brushed or wiped clean, once a year or more, of any dust or dirt that
settles on it, depending on the accumulation.
The unit SHOULD NOT be submerged in water or other liquids. Also, hosing and other
conditions that could cause a liquid to enter the enclosure should be avoided.
6.2 VERIFICATION OF OPERATION
Verification of operation should be performed at least once every 6 months. For highly
demanding applications more frequent verification is recommended.
To verify the operation of the system, make sure that the green power LED indicator is on
steady state. Push and hold the test button to verify the audio and WARNING and ALARM
relays are operational.
6.3 SENSOR REPLACEMENT
The sensor should be replaced when the sensor no longer adequately responds to test gas.
Refer to the corresponding calibration section and follow the calibration steps to apply the test
gas to the sensor.
CAUTION
TURN OFF THE MAIN POWER SUPPLY BEFORE ATTEMPTING THE FOLLOWING PROCEDURE.
ON-BOARD SENSOR(S):
Sensor(s) have a socket connection to the DSI board for easy sensor replacement in the
field. For removal, unplug the sensor from the DSI when the main power supply is turned
off. For installation, hold the sensor in such a way that the sensing area is not covered.
Align the sensor pins with pin sockets on the DSI and lightly push the sensor on to the
DSI. Sensors need to be calibrated at regular intervals, see 5.2.2 AMC-DSI
CALIBRATION for procedure. Sensor replacement is needed when the sensor life has
expired. New sensor elements require calibration.
The AMC-DSI is part of the Armstrong EZ Cal Sensor Replacement Program which
allows the sensor to be replaced by a calibrated sensor.
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