RKI Instruments Beacon 200 RIg Monitor, H2S/H2S - Manual (Page 12)

7 • Beacon 200 Rig Monitor Operator’s Manual
there is enough room to perform a calibration. A cover on the front of the
junction box allows access to the interior of the junction box.
The detector housing body protects the sensing components within the
housing body. Use the removable cap near the bottom of the housing body
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 body. A cap gasket
seals the interface between the housing body and cap. A flame arrestor
guard is permanently bonded to the cap.
The calibration cup/splash guard is screwed onto the bottom of the flame
arrestor guard.
The sensor is secured within the sensor housing by four pins. Through a
series of chemical and electrical reactions, the sensor produces an
electrical output that corresponds to the detection range of the detector. A
pre-amplifier, located between the sockets and two interconnect wires,
conditions the sensor’s signal before the signal reaches the controller. A
rubber boot and spacer are installed on the sensor face to ensure that the
sensor remains plugged into the detector housing body.
12 VDC Battery Cable
A 50 foot cable with clamps for connection to a 12 VDC battery (customer
supplied battery not included) is factory-wired through the right cable
bushing of the Beacon 200. One end of the cable is connected to the DC In
terminal strip.
Cap Gasket
Detector Housing Body
Calibration Cup/
Splash Guard
Flame
Arrestor
Guard
Detector
Housing Cap
H2S Plug-in Sensor
Rubber Boot
Spacer
Figure 3. H
2
S Detector Component Location