RKI Instruments Gas Tracer - Manual (Page 16)

8 • Instrument Description Gas Tracer Operator’s Manual
Dummy Sensors
Any unit that has less than 5 sensors will have a dummy sensor installed in
one or more sensor positions. Dummy sensors are factory installed. The flat
top of the dummy sensor should face up and the bottom hollow side should
face down. The unit shown below is a standard 4-sensor unit for LEL/O
2
/
ppm/CO and has a dummy sensor installed in the %volume combustible
sensor position.
Figure 3: Dummy Sensors
Bottom
Hollow Side
Dummy Sensor
Top Flat
Side