RKI Instruments 35-3010RKA-02 - Manual (Page 10)

6 • 35-3010RKA-02 Sample-Draw Detector
CO Dummy Plug
The CO sensor position in the flow block is occupied by a plastic dummy plug in the
35-3010RKA-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 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.
FB
4/2 0 TP
-
TP
+
B ATT
+ +
SPAN
OXY
W B K
Oxygen
Transmitter
Sensor Terminal
Strip
Test Point TP-
24 V
OXY
TOXIC 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