User Manual

35-3010RKA-02 Sample-Draw Detector • 7
Oxygen Transmitter
The oxygen transmitter is mounted to the right of th e LEL transmitter and ab ove the main
circuit board. The amplifier inclu d es the amplifier type selector, two internally wired ter-
minal strips, span pot, zero pot, and test points.
Transmitter Type Selector
The transmitter type selector is near the bottom left corner of the amplifier. It is to the left
of the detector terminal strip and below the span po t.
The transmitter included with the sample-draw detector is designed for use with RKI’s
oxygen and to xic gas sensors. The transmitter type selector determ ine s for which sensor
the amplifier is intended . For oxygen transmitters, a jumper block is installed over the
OXY select or.
Detector Terminal Strip
The detector terminal strip is the four-point terminal strip near the bottom edge o f the
transmitter. It is fact ory wired to the transmitter.
Interconnect Terminal Strip
The interconnect terminal strip is the four-point terminal strip nea r the top edge of the
transmitter. It is fact ory wired to the main circuit board.
Span/Zero Pots
The span and zero pots are located on the left side of the transmitter and are used for
calibration. Us e the spa n pot to make adjus tments to gas response readings and the zero
pot to make ad justments to the zero reading
Test Points
The test points are located on the top of the transmitter on eith er si de of the transmitter
interconnect terminal strip. They are labeled TP+ and TP-. A 100 mV - 500 mV output is
available at t hes e test points for use during calib ration.
Preamp Circuit Board
The preamp circuit is used to connect the CO and H
2
S sensors to the main circuit board
and to secure the sensors in the flow block. Two cables mate to the main circuit board: the
one on the left is for the CO sensor signal and the one of the right is for the H
2
S sensor
signal. Since the CO sensor is replaced with a du mmy plug in the 35-3010RKA-02 the CO
sensor signal cable carries no signal in this version of the 35-3010RK.