RKI Instruments 65-2504RK - Manual (Page 6)

2 • 65-2504RK Oxygen Transmitter
Description
This section describes the components of the oxygen transmitter. The transmitter consists
of the oxygen detector, amplifier, and junction box.
Figure 1: Oxygen Transmitter Component Location
Oxygen Detector
The oxygen detector includes the oxygen sensor, detector housing, and detector leads.
Oxygen Sensor
The oxygen sensor is encapsulated within the detector housing. Through a series of
chemical and electronic reactions, the sensor produces an electrical output that is
proportional to the detection range of the transmitter.
Detector Housing
The oxygen sensor is encapsulated within the detector housing. Mounting threads
(3/4 in. NPT) at the top of the detector housing allow you to mount the oxygen detector
into the bottom conduit hub of the junction box.
Detector Leads
Two color-coded leads extend from the top of the detector. The leads allow you to connect
the oxygen detector to the amplifier.
Oxygen detector
Test point (+)
Test point (-)
Zero potentiometer
Span potentiometer
Securing screw (2)
Oxygen amplifier
Amplifier type
selector
TOXIC
OXYGEN
ZERO
SPAN
Potentiometer
(factory-set)
Interconnect
terminal strip
BATT
- +
4/20
FB +
24V
POWER/SIG
Detector
terminal strip
TOXIC
RD BK
OXY
W G
SENSOR
TP - TP
+