RKI Instruments 65-2432RK - Manual (Page 5)

65-2432RK CO Transmitter • 5
Description
This section describes the components of the CO transmitter. The transmitter consists of
the CO detector, amplifier, and junction box.
Figure 1: CO Transmitter Component Location
CO Detector
The CO detector includes the detector housing and sensor.
Detector housing
The detector housing protects the sensing components within the housing. Use the
mounting threads at the top of the housing to screw the CO detector into the bottom
conduit hub of the junction box. Use the removable cap near the bottom of the housing to
access the sensor for maintenance or replacement. The cap protects the sensor from
damage and includes a flame arrestor which contains any sparks which may occur
within the detector housing. A cap gasket seals the interface between the housing and
cap.
Two wires extend from the top of the detector housing. Use these wires to connect the CO
detector to the amplifier. The housing includes a four-socket pattern. This socket
pattern accepts the sensor’s four pins to secure the sensor within the detector housing. A
pre-amplifier, located between the sockets and two interconnect wires, conditions the
sensor’s signal before the signal reaches the amplifier.
Sensor
The sensor is secured within the sensor housing by the four pins. Through a series of
chemical and electrical reactions, the sensor produces an electrical output that is
proportional to the detector range of the transmitter.
Zero Potentiometer
Span Potentiometer
Flame Arrestor
Detector Housing
Cap
Factory Set
Potentiometer
Test Point (-)
Detector Terminal Strip
Jumper Block Installed To
Toxic Select Header
3/4" Conduit Hub
Detector Housing
Securing Screw (2)
Test Point (+)
Cap Gasket
Interconnect Terminal
Strip
Carbon Monoxide
Amplifier
Carbon Monoxide Detector