RKI Instruments 65-2507RK - Manual (Page 6)

2 • 65-2507RK 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. The oxygen sensor used is a
capillary type that is not susceptible to output changes with changes in atmospheric
pressure.
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
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
+