Owner manual

2 • 65-2394RK-CH4-4 Combustible Gas Transmitter
Description
The 65-2394RK-CH4-4 combustible gas transmitter utilizes an infrared type of detector
which has some advantages over a catalytic type of combustible detector. The infrared
detector will generally have a longer service life than a catalytic detector, it will require
calibration less often, and it can detect combustible gas even if there is no oxygen in the
sample which allows detection of combustible gas in an inert atmosphere.
This section describes the components of the combustible gas transmitter. The transmitter
is a 4 - 20 mA type detector head. It consists of the combustible gas detector, calibration
cup/splash guard, amplifier, the amplifier junction box, and the detector junction box.
The two junction box configuration is intended for situations where the detector needs to
be installed at an inaccessible location. The detector junction box can be installed at the
inaccessible location and the amplifier junction box can be installed in a more readily
accessible area.
Figure 1: Combustible Gas Transmitter Component Location
GWRB
Sensor
Cu rrent
m A
SPAN
ZERO
Amplifier
Factory Adjust
Pot
57-1053RK
S
S2 001
Jumper Pins,
Factory Use
Only
Detector Terminal
Strip
- Test Point
+ Test Point
Zero Pot
Span Pot
Factory Adjust Pot
Terminal Strip
IR LEL Detector
Detector J-Box
Amplifier J-Box
LEL PWR / SIG
Calibration Cup/Splash Guard
Controller Term inal
Strip