User Manual

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.