Macurco CD-xx H/MC Manual
REV
–
1.1
[34-2900-0510-8]
19
|
P a g e
4.4
4-20mA Loop
Clean Air
–
With the 4-20 mA func
tion turned “On” and the current concentration of CO
P
2
P
ppm, the 4-20mA loop will output a
mA reading equivalent to the current gas reading of the detector.
Fan Level
–
With the 4-
20 mA function turned “On” and the current concentration of CO
P
2
P
ppm detected is at or greater than the
Fan Relay Setting (Frs), the 4-20mA loop will output between 4 mA and 20 mA depending on the current concentration of CO
P
2
P
.
or figure 3
-9 12-Series 4-20 mA Output diagram
Alarm Level
–
With the 4-
20 mA function turned “On” and the current concentration of CO
P
2
P
ppm detected is at or greater than
the Alarm Relay Setting (Ars), the 4-20mA loop will output between 4 mA and 20 mA depending on the current concentration of
CO
P
2
P
. See figure
or
figure 3-9 12-Series 4-20 mA Output diagram
Trouble
–
With the 4-
20 mA function turned “On” and Trouble Fan Setting enabled. The 4
-20mA loop will output less than 4 mA
or greater than 20 mA depending on the Trouble condition. See section
4.5
Default
–
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 for CD-xxH
1000 ppm for CD-xxMC
Fan Relay Delay
3 minutes
Fan Relay Minimum Runtime
0 minutes
Fan Relay Latching
Off
Trouble Fan Setting
Off
4-20mA
On
Table 4-1 Default settings
Содержание CD Series
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