RKI Instruments Pioneer 4W - Manual (Page 79)

Pioneer Operator’s Manual (PRELIMINARY) Oxygen Transmitter • 3
Sensor terminal block
The sensor terminal block is the two-point terminal block that is located in the detector
junction box. Use the sensor terminal block to connect the oxygen detector to the
amplifier.
NOTE: The oxygen sensor is factory-wired to the sensor terminal block. See the
Installation section of this insert for all wiring procedures related to the
transmitter.
Detector junction box
The rectangular junction box allows you to install the oxygen detector at a mounting site
that is remote from the Pioneer, and it protects the detector and wiring connections.
A hub at the top of the junction box allows you to route the wiring from the detector to the
amplifier. The front of the junction box is the junction box cover. It includes a diffusion
port that allows oxygen in the surrounding environment to contact the oxygen sensor.
Two slot-head screws secure the cover to the junction box. You can loosen these screws to
access the interior of the junction box.
Amplifier
The amplifier converts the electrical output from the oxygen sensor to a 4 to 20 mA signal
(that is proportional to the detection range) and transmits the signal to the Pioneer. The
amplifier includes the amplifier type selector, detector terminal strip, interconnect
terminal strip, span potentiometer, zero potentiometer, and test points (see Figure 1.)
Amplifier type selector
The amplifier type selector is near the top left corner of the amplifier. It is above the
detector terminal strip and to the left of the span potentiometer.
The amplifier included with the oxygen transmitter is designed for use with RKI’s oxygen
and toxic gas transmitters. The amplifier type selector determines for which transmitter
the amplifier is intended. For oxygen transmitters, a jumper block is installed over the
OXY selector (see Figure 1.)
Detector terminal strip
The detector terminal strip is the four-point terminal strip on the left side of the amplifier.
Use the detector terminal strip to connect the oxygen detector to the amplifier.
NOTE: The oxygen detector is factory-wired to the amplifier. See the Installation section
of this insert for all wiring procedures related to the transmitter.
Interconnect terminal strip
The interconnect terminal strip is the four-point terminal strip on the right side of the
amplifier. Use the interconnect terminal strip to connect the amplifier to the Pioneer.