RKI Instruments 65-2513RK - Manual (Page 7)

65-2513RK Oxygen Transmitter • 3
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
OXYGEN selector (see Figure 1).
Detector Terminal Strip
The detector terminal strip is the four-point terminal strip near the bottom 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 manual for all wiring procedures related to the transmitter.
Interconnect Terminal Strip
The interconnect terminal strip is the four-point terminal strip near the top of the
amplifier. Use the interconnect terminal strip to connect the amplifier to the controller.
Span Pot
The span pot is on the left side of the amplifier. Of the three pots, the span pot is closest to
the bottom of the amplifier. Use the span pot to adjust the transmitter’s response output
during the start-up and calibration procedures.
Zero Pot
The zero pot is directly above the span pot. Use the zero pot to adjust the transmitter’s
oxygen-free output during the calibration procedure.
CAUTION: The amplifier includes an additional potentiometer above the zero potentiometer.
It is factory-set. Do not adjust it.
Test Points
The test points (labeled TP- and TP+) are directly to the left and right of the interconnect
terminal strip. The test points produce a 100 - 500 mV output that is proportional to the
transmitter’s 4 - 20 mA output. Use the test points and a voltmeter to measure the
transmitter’s output during the start-up and calibration procedures.
Junction Box
Use the junction box to install the oxygen transmitter at a mounting site that is remote
from the controller. The junction box also protects the amplifier and wiring connections
made to the amplifier. Use the two 3/4 in. conduit hubs to mount the detector to the
junction box (bottom hub) and connect wiring from the amplifier to the controller
(top hub).
NOTE: The oxygen detector and amplifier are factory-mounted to the junction box.
Use the junction box’s two mounting holes to mount the oxygen transmitter to a vertical
surface at the monitoring site. Use the cover on the front of the junction box to access the
interior of the junction box.