Carbon Monoxide Transmitter
Installation Manual
IN-CMD5B1-01-01
May 2, 2017
Page 3
Verifications/ Calibration
The transmitter features a simple snap-mount sensor pcb that is pre-calibrated. This means that the entire sensor pcb can
simply be replaced with a new calibrated pcb if desired without having to remove the enclosure. This sensor swap requires no
tools and can be completed in seconds. Simply disconnect the device wiring, remove the old sensor pcb, snap in the new pcb
and reconnect the device power. There is no need to make any adjustments or apply gas to the transmitter using the sensor
swap method.
The device may also be calibrated or verified with CO gas if required. This requires a field calibration kit consisting of a
bottle of gas (250 ppm CO in air for example), a tank pressure regulator with flow restrictor and the necessary tubing with a
calibration cap to cover to the sensor. Calibration can be done at 20-27
C.
Verification
Verification with gas can be done without removing the device cover. Simply apply gas using the calibration cap attached
directly to the port on the cover and monitor the output signal.
Verify With Cover In Place
Calibration
The device cover must be removed to perform an actual calibration. In this case, the gas calibration cap attaches to the sensor
fixture inside the enclosure.
Calibrate With Cover Removed