RKI Instruments 61-1000RK-05 - Manual (Page 6)

2 • 61-1000RK-05 Combustible Gas Detector
Description
This section describes the components of the 61-0140RK-05 and 61-1000RK-05 detectors.
The 61-1000RK-05 includes the 61-0140RK-05 combustible gas detector and a junction box.
A four point terminal strip is provided inside the junction box for detector connections.
The 61-0140RK-05 does not include a junction box.
Figure 1: 61-1000RK-05 Component Location
61-0140RK-05 Combustible Gas Detector
The combustible gas detector is a catalytic type detector that produces an electrical output
that corresponds to the detection range. It is packaged in a 1/2 inch NPT nipple with a
sintered metal flame arrestor on one end allowing ambient air to diffuse into the detector.
The flame arrestor also contains any sparks which may occur within the detector. The 1/2
inch NPT mounting threads at the top of the detector allow you to mount it into the
bottom conduit hub of the junction box. The controller conduit hubs are normally 3/4”
NPT, so a 3/4 in. x 1/2 in. NPT reducer may be necessary to install the combustible gas
detector. A flame arrestor guard is located at the bottom of the detector and is
permanently bonded to the detector housing. The flame arrestor guard protects the flame
arrestor from impact damage. Four color-coded leads extend from the top of the detector.
The leads allow you to connect the detector to the terminal block.
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 conduit hubs allow you to
mount the detector to the junction box and connect the wiring from the detector to a
controller. 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.
The bottom conduit hub includes a 3/4 in. x 1/2 in. reducer that allows you to screw the
detector into the hub. The terminal block within the junction box facilitates the wiring
Rubber
Spacer,
3X
J-Box
Red
Black
Green
White