Macurco RD-6 - 4.3 Display Functionality (Off); 4.4 4-20 mA Output Loop

Macurco RD-xx User Manual
REV – 1.0 [34-2900-0511-7 ] 19 | Page
Alarm level – With the display function turned “On” and the refrigerant concentration reaching the Alarm Relay setting, (600
ppm, for 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
5.1.2 “t” Error
Codes 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 flash back and forth between “dUE” and current gas reading. Calibration Due is resolved only with successful field
calibration.
4.3 Display turned “Off”
Clean Air – With the display function turned” Off”, the display does not show the refrigerant concentration. Only the Power
indicator light on will be on.
Fan Level – When the refrigerant concentration reaches the Fan Relay setting (100ppm, for example) the display will show
“FAn” continuously as long as the fan relay is enabled.
Alarm Level – With the display function turned off the display does not show the refrigerant concentration but will show “ALr”
when 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
5.1.2 “t” Error
Codes 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.
4.4 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 at “0 ppm” (zero), the 4-20mA loop will
output 4 mA.
Gas read – With the 4-20 mA function turned “On” the output will read between 4 mA and 20 mA depending on the current
concentration of target gas.
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 5.1 On-Board Diagnostics
.