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RKI Instruments 35-3010RK-02 User Manual

Page 10

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6 • 35-3010RK-02 Sample-Draw Detector

CO Dummy Plug

The CO sensor position in the flow block is occupied by a plastic dummy plug in the
35-3010RK-02.

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 on the preamp circuit board.

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 dummy plug in the 35-3010RK-02 the CO
sensor signal cable carries no signal in this version of the 35-3010RK.

Main Circuit Board

Figure 3: Main Circuit Board

The main circuit board includes the interconnect terminal strip, sensor/transmitter
terminal strip, amp 1 circuit, amp 2 circuit, pump terminal strip, relay, and reset switch
(see Figure 3).

NOTE:

The flowmeter and status lights are mounted to the main circuit board but are
considered part of the flow system.

Test Point CAL + 2

Amp 1

(CO)

Zero

Span

Zero

Fail LED

Sensor/Transmitter

Terminal Strip

Pressure Switch

Reset

Switch

Pilot LED

Amp 2

(H2S)

Span

Test Point CAL + 1

Test Point CAL - 2

Test Point CAL - 1

AC Terminal
Strip Not Used

Interconnect Terminal
Strip

Low Flow Adjust

Flow Adjust Pot

Flowmeter

Pump Terminal Stip

Relay