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Description, Oxygen detector – RKI Instruments 65-2516RK User Manual

Page 6

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2 • 65-2516RK 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 detector housing and sensor.

Detector Housing

The detector housing protects the sensing components within the housing. Use the
mounting threads at the top of the housing to screw the oxygen detector into the bottom
conduit hub of the junction box. Use the removable cap near the bottom of the housing 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. A cap gasket seals the interface between the housing and cap. The
flame arrestor guard is permanently bonded to the cap.

Two wires extend from the top of the detector housing. Use these wires to connect the
oxygen detector to the amplifier. The housing includes sockets installed on a circuit board.
These sockets accept the sensor’s two pins to secure the sensor within the detector
housing. The circuit board with the sockets conditions the sensor’s signal before the signal
reaches the amplifier.

3/4" NPT Conduit Opening
For Wire Entry

ZERO

SPAN

Not

Used

4/20

FB

+

24V

POWER/SIG

OXY

W

G

SENSOR

TP

-

TP

+

Not

Used

OXYGEN

Interconnect Terminal
Strip

Test Point (+)

Amplifier

Securing Screw (2X)

Detector
Housing

Detector Housing
Cap

Flame Arrestor
Guard

Oxygen

Detector

Test Point (-)

Factory Set

Potentiometer

Zero

Potentiometer

Span

Potentiometer

Jumper Block

Installed On Oxygen

Select Header

Detector Terminal

Strip