Operation - Macurco CM6-FCK User Instructions

Operation

1. With the display function turned "On", the CM-6 will show the current concentration of CO ppm or "0" (zero) in clean air. When
the CO concentration reaches the Fan Relay setting (35 ppm, for example) the display will flash back and forth between "FAn"
and "35". With the display function turned "Off", the display does not show the CO concentration, but will show "FAn" as long as
the fan relay is activated.
2. 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.
3. With the 4-20 mA function turned "On" and the CO concentration climbing, the 4-20 mA signal will ramp up corresponding to
the concentration (0-200 ppm, for example). The display will show "FAn" and "ALr" and sound as outlined above.
Default Configuration – Factory Settings

The default Power Up Test setting is On

The default Display setting is Off

The default Buzzer setting is Off

The default Alarm Relay Setting is activation at 200 ppm

The default Alarm Relay Configuration setting is Normally Open

The default Fan Relay Setting is activation at 35 ppm

The default Fan Relay Delay setting is 3 minutes

The default Fan Relay Minimum Runtime setting is 0 minutes

The default Fan Relay Latching condition is OFF

The default Trouble Fan Setting condition is OFF

The default 4-20mA Output setting is On
To change settings, remove the Philips screw on the front of the CM-6. Pull off the front cover of the unit.
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