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Description
35-3010RKA-04H Sample-Draw Detector Head
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.
Figure 3: LEL Transmitter
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.
LEL Transmitter
Zero Pot
Interconnect
Terminal Strip
Test Point TP+
Span Pot
Test Point TP-
