RKI Instruments 35-3010RKA-01 User Manual

Page 10

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6 • 35-3010RKA-01 Sample-Draw Detector

Carbon Monoxide Sensor

The carbon monoxide gas sensor is installed in the upper left side of the flow block. It has
4 pins which mate with sockets in the preamp circuit board.

Hydrogen Sulfide Gas Sensor

The hydrogen sulfide gas sensor is installed in the upper right side of the flow block. It
has 4 pins which mate with sockets in the preamp circuit board.

Figure 3: LEL & Oxygen Transmitters

LEL Transmitter

The LEL transmitter is mounted to the left of the oxygen transmitter and above the main
circuit board. It consists of the span pot, zero pot, one internally wired terminal strip, and
the test points.

Span/Zero Pots

The span and zero pots are located at the bottom edge of the transmitter and are used for
calibration. Use the span pot to make adjustments to gas response readings and the zero
pot to make adjustments to the zero reading

Transmitter Interconnect Terminal Strip

The transmitter interconnect terminal strip is the seven-point terminal strip near the right
edge of the transmitter. The transmitter is factory wired to the sensor and main circuit
board.

Test Points

The test points are located on the left side of the transmitter and are labeled TP+ and TP-.
A 100 mV - 500 mV output is available at these test points for use during calibration.

Oxygen Transmitter

The oxygen transmitter is mounted to the right of the LEL transmitter and above the main
circuit board. The amplifier includes the amplifier type selector, two internally wired

FB

4/2 0

TP

-

TP

+

B AT T

+

+

SPAN

OXY

W

B K

Oxygen
Transmitter

Sensor Terminal
Strip

Test Point TP-

24 V

OXY

T OXIC

R D

Test Point TP+

T OXIC

Interconnect

Terminal Strip

LEL Transmitter

Zero Pot

Span Pot

Interconnect
Terminal Strip

Transmitter Type Selector,
Set To OXY

G

Test Point TP+

Zero Pot

Span Pot

Test Point TP-

ZERO

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