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Macurco CD-xx H/MC Manual
4 Operations
1. With the display function turned "On", the CD-xxH/MC will show the current concentration of CO
Normal outdoor concentration ranges between 350-450 ppm. When the CO
setting (2000 ppm, for example) the display will flash back and forth between "FAn" and "current gas reading". With
the display function turned "Off", the display does not show the CO
fan relay is activated.
2. With the display function turned "On" and the CO
example) the display will flash back and forth between "ALr" and "current gas reading". 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
corresponding to the concentration (0-5000 ppm, for example). The display will show "FAn" and "ALr" and sound as
outlined above.
4.1 Power up
The CD-xxH/MC cycles through an internal self-test cycle for the first minute that it is powered. The unit will execute the test
cycle any time power is dropped and reapplied (i.e. power failure). During the self-test cycle the unit will display the firmware
version number, then count down from 60 to 0 (if the display setting is "On") and finally go into normal operation. The alarm
relay will be activated for 10 seconds and the fan relay for 60 seconds during the power-up cycle unless the "Power Up Test"
(PUt) option is OFF. The indicator light (LED) will flash green during the self-test cycle. At the end of the 1-minute cycle, the unit
will take its first sample of the air and the indicator light will turn solid green.
4.2 Display turned "On"
Clean Air – With the display function turned "On", the CD-xxH/MC will show the current concentration of CO
Note: CO
in "clean air" will not show 0 as normal atmospheric CO
2
P
P
Fan level – When the CO
concentration reaches the Fan Relay setting (2000 ppm, for example) the display will flash back and
2
P
P
forth between "FAn" and "2000" (or current gas reading).
Alarm level – With the display function turned "On" and the CO
example) the display will flash back and forth between "ALr" and "current gas reading". The buzzer will sound indicating "Alarm"
if the buzzer is turned "On".
Trouble – With the display function turned "On" and the device is in a trouble state, the display will display the "t" Error code
(t01 for example). If the Trouble Fan Setting is enabled, the Fan relay will switch activating the relay. See section
Codes
and section
4.5.11 Trouble Fan Setting – "tFS".
3 1T
31T
4.3 Display turned "Off"
Clean Air – With the display function turned" Off", the display does not show the CO
light on will be on.
Fan Level – When the CO concentration reaches the Fan Relay setting (2000 ppm, for example) the display will flash back and
forth between "FAn" and "blank" as long as the fan relay is enabled. This appears as slowly flashing "FAn".
Alarm Level – With the display function turned off the display does not show the CO
the Alarm relay is activated.
Trouble – With the display function turned "On" and the device is in a trouble state, the display will display the "t" Error code
(t01 for example). If the Trouble Fan Setting is enabled, the Fan relay will switch activating the relay. See section
Codes
and section
4.5.11 Trouble Fan Setting – "tFS".
3 1T
31T
REV – 1.1
2
P
concentration reaching the Alarm Relay setting, (4000 ppm, for
2
P
P
concentration climbing, the 4-20 mA signal will ramp up
2
P
P
levels are between 350 ppm and 450 ppm.
2
P
P
concentration reaching the Alarm Relay setting, (4000 ppm, for
2
P
P
31 T
31 T
[34-2900-0510-8]
concentration reaches the Fan Relay
2
P
P
concentration but will show "FAn" as long as the
P
concentration. Only the Power indicator
2
P
P
concentration but will show "ALr" when
2
P
P
ppm in the air.
2
P
P
2
P
P
ppm.
2
P
P
5.1.2 "t" Error
31T
5.1.2 "t" Error
31T
18 |
P a g e
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