Macurco RD-xx User Manual
REV – 2.1
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Trouble –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
and Section
4.5.11 Trouble Fan Setting – “tFS”.
Calibration Due- With Calibration Period functionality enabled, if a detector is within 1 month of calibration period, then display
will show “dUE” continuously. Calibration Due is resolved only with successful field calibration.
4.3
4-20mA Loop
4-20mA settings selected to ‘bAS’ or ‘EnH’ is considered as 4-20mA function turned ON.
Clean Air – With the 4-20 mA function turned “On” and the current gas concentration below 1000ppm, the 4-20mA loop will
output 4 mA.
Alarm – With the 4-20 mA function turned “On”, 4-20mA will output 20mA when unit goes into Alarm.
Trouble – With the 4-20 mA function turned “On” and Trouble Fan Setting enabled. The 4-20mA loop will output 1 mA or 24 mA
depending on the Trouble condition. See Section
4.4
Default – Factory Settings
Setting:
Default:
Power Up Test
On
Buzzer
On
Alarm Relay Configuration
Normally Open (NO)
Fan Relay Delay
3 minutes
Fan Relay Minimum Runtime
0 minutes
Fan Relay Latching
Off
Trouble Fan Setting
Off
4-20mA
bAS
Calibration Period
diS (disabled)
To change settings, remove the Philips screw on the front of the RD-xx. Pull off the front cover of the unit.
Figure 3-17 Board View
