Manual

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3. With the 4-20 mA function turned “On” and the CO
2
concentration climbing, the 4-20 mA signal will ramp up corresponding to
the concentration (0-5000 ppm, for example). The display will show “FAn” and “ALr” and sound as outlined above.
3.10 Default Configuration – Factory Settings
Setting:
Default:
Power Up Test
On
Display
On
Buzzer
On
Alarm Relay Setting
4000 ppm
Alarm Relay Configuration
Normally Open (NO)
Fan Relay Setting
1000 ppm
Fan Relay Delay
3 minutes
Fan Relay Minimum Runtime
0 minutes
Fan Relay Latching
Off
Trouble Fan Setting
Off
4-20mA
On
To change settings, remove the Philips screw on the front of the CD-12”x”. Pull off the front cover of the unit.
3.10.1 Selecting Default Configuration – “dEF”
To select the Default Configuration, in normal mode, push the Next button to get to “Con” or the Configuration menu. Then push the
Enter button to enter the Con menu. The first selection is the “dEF” or Default setting. Push Enter. If it is already in Default
configuration, there will be no action. If it is not already in Default configuration, “nO” will be displayed. Push Next to change it to “YES”
(flashing) then push Enter to confirm the change (solid) and push Enter again to return to “dEF” in the con menu. Push Next until “End”
is displayed then push Enter to get back to normal operation.