RKI Instruments 65-2615RK-05-04 - Manual (Page 10)

5 65-2615RK-05-04 M2 Transmitter Operator’s Manual
detector housing body. Use these wires to connect the H
2
S detector to the terminal strip.
One of the wires is red and one of the wires is black.
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 controller.
Housing Cap & Cap Gasket
The housing cap screws onto the detector housing. It retains the plug-in sensor and
protects it from damage. The housing cap also includes a flame arrestor which contains
any sparks that may occur within the detector and a flame arrestor guard which protects
the flame arrestor from damage. Unscrew the detector cap to access the plug-in sensor for
maintenance or replacement. A cap gasket seals the interface between the housing and
cap. A flame arrestor guard is permanently bonded to the cap.
Rubber Boot and Spacer
A rubber boot and spacer are installed between the detector housing cap and the sensor.
They help ensure that the sensor remains plugged into the detector housing body.
Plug-In H
2
S Sensor
The sensor is secured within the detector assembly by the housing cap. Through a series
of chemical and electrical reactions, the sensor produces an electrical output that
corresponds to the detection range of the transmitter.
Calibration Adapter/Splash Guard
A calibration adapter/splash guard is installed on the H
2
S detector. A fitting at the bottom
of the calibration adapter/splash guard allows a length of tubing to be connected for
calibration and routed to a more easily accessible location (near the M2 junction box is
optimal for ease of calibration). The calibration adapter/splash guard also protects the
detector from splashing water or direct water spray.
Magnetic Wand
The magnetic wand is a short plastic rod with a magnet in one end. It is used to actuate
the magnetic control switches on the control PCB while the junction box cover is still
installed so that non-intrusive calibration can be performed.