RKI Instruments 61-0191RK - Manual (Page 7)

61-1004RK/61-0191RK Carbon Dioxide Detector • 3
The output of the CO
2
detector mimics the output of RKI’s standard catalytic LEL
detectors. For this reason, the CO
2
detector’s wire colors are the same as RKI’s catalytic
LEL detectors, black, white, green, and red. When the CO
2
detector is wired to an RKI
controller, it is wired the same way an LEL detector is wired, to the LEL detector
terminals. See “Wiring the CO2 Detector to a Controller” on page 5 for wiring
connections.
Junction Box
The junction box allows you to install the detector at a mounting site that is remote from a
controller and it protects the detector wiring connections. Two 3/4” NPT conduit hubs
allow you to mount the detector to the junction box and connect the wiring from the
detector to a controller. The terminal block within the junction box facilitates the wiring to
the detector. A cover on the front of the junction box allows access to the interior of the
junction box. Three spacers installed on the back of the junction box control the distance of
the junction box from a mounting surface and ensure that there is enough room to install a
calibration cup on the detector during calibration.
Table 2: CO
2
Detector Color Designations
Detector Color Designations
0 - 5,000 ppm black shrink tubing on white wire
0 - 5% volume green shrink tubing on white wire
0 - 50% volume green shrink tubing on red wire
0 - 100% volume red shrink tubing on green wire