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5.
With the display function turned “On” and the CO concentration reaching the Alarm Relay setting, (200 ppm, for example) the
display will flash back and forth between “ALr” and “200”. The buzzer will sound indicating “Alarm” if the buzzer is turned “On”.
With the display function turned off the display does not show the CO concentration, but will show “ALr” when the Alarm relay is
activated.
Note: If the Alarm relay fails to operate within 2 minutes, there are four possibilities:
a.
Gas cylinder is empty, check the pressure gauge. Replace the gas cylinder if 25-psi or less.
b.
Unit needs to be re-calibrated (go through recalibration and re-test).
c.
Detector is in need of servicing (return unit to factory for servicing).
d.
Detector has Alarm relay set to disable (diS). Set Alarm relay to 100 ppm and repeat the test.
6.
Remove the gas from the sensor after Test. Proceed to Test the 4-20mA output or replace the top cover.
Testing the 4-20mA current loop
1.
Connect the 200 ppm cylinder of carbon monoxide to the regulator.
2.
Check the pressure gauge. If there is 25-psi or less the cylinder should be replaced.
3.
Place the cap from the regulator over the CO sensor. Turn on the regulator to start the gas flow.
4.
The Fan relay should activate according to the settings.
5.
The Alarm relay should activate according to the settings.
6.
The 4-20 mA output should ramp up from 4mA in clean air to 20mA at 200 ppm. See 4-20 mA diagram on page 6.
Note: If the 4-20mA output does not ramp up within 2 minutes, there are four possibilities:
a.
Gas cylinder is empty, check the pressure gauge. Replace the gas cylinder if 25-psi or less.
b.
Unit needs to be re-calibrated (go through recalibration and re-test).
c.
Detector is in need of servicing (return unit to factory for servicing).
d.
Detector has 4-20 mA option set to “OFF”. Set 4-20mA option to “On” and repeat the test.
7.
Remove the gas from the sensor. Re-assemble the CM-6 (make sure the LED is aligned with the front case hole). You are
done.
Aerosol Carbon Monoxide Test
The CME1-FTG is an 11L 500 ppm Aerosol Carbon Monoxide Field Test Gas that can be used with the CM-6. This field test gas allows
installers to do a quick functionality test of the CO sensor. The flow rate of the CME1-FTG is 10 Lpm so you will have about a minute of
gas or enough to test 20-30 sensors.
1.
Units to be tested must be powered continuously for a minimum of 3 minutes before proceeding.
2.
For optimum test results the unit should be in clean air and be in a low ambient air flow.
