RKI Instruments Pioneer 4W - Manual (Page 78)

Oxygen Transmitter • 2 Pioneer Operator’s Manual (PRELIMINARY)
Description
This section describes the components of the oxygen transmitter. The transmitter consists
of the oxygen detector and amplifier. The oxygen detector and amplifier are housed in
separate junction boxes. The junction boxes are connected by a 3/4 in. closed nipple.
Figure 1: Oxygen Transmitter Component Location
Oxygen Detector
The oxygen detector includes the sensor, sensor connector, sensor terminal block, and
detector junction box (see Figure 1.)
Oxygen sensor
The oxygen sensor is installed within the detector junction box. Through a series of
chemical and electronic reactions, the cell produces an electrical output that is
proportional to the detection range of the transmitter.
Detector connector
The cable that extends from the sensor terminates in a socket. A 7-pin male connector
plugs into the socket to complete the detector connector assembly. Two color-coded leads
extend from the detector connector.
Detector
terminal strip
Securing
screw (2)
Test point (-)
Interconnect
terminal strip
Span
potentiometer
Zero
potentiometer
Oxygen
amplifier
TOXIC OXY
Amplifier
type selector
Test point (+)
Oxygen
Sensor
Sensor
connector
Sensor
terminal block
3/4 in. closed nipple
Detector junction box