3.1.2.4 Sensor assembly connection
For the sensor assembly with the threaded configuration, the pneumatic connection to the process gas
stream is made at the 3/4-16 threaded flow-through head connection with a supplied top seal O-ring and
receptacle gasket. Electrical connection to the Model 7100E is made at the female 7-pin DIN connector
with a screw-on capture ring.
Connect the sensor to the flow-through head. Verify the supplied O-ring is in place at the base of the
sensor, over the 3/4-16 threaded connector. Do not lubricate the O-ring. Verify the supplied gasket is
seated in the bottom of the flow-through head sensor receptacle. Screw the sensor into the flow-through
head sensor receptacle, and hand-tighten. Do not over-tighten. The O-ring and gasket should be slightly
compressed. Match the sensor threaded flow-through head connection against the mating receptacle in
the sensor flow-through head.
For the sensor assembly with the KF fitting configuration, the connection is made to the mating flange
with a field supplied elastomeric O-Ring mounted in a centering ring, which aligns the flanges and holds
the O-Ring in position.
Step 3 –install the analyzer
DANGER: Electrical connections on the rear of the Model 7100E oxygen analyzer may
have hazardous voltages present once power has been applied to the unit. High voltages
may remain present for a short time even after power has been disconnected from the
analyzer. Take care in observing standard electrical practices when making electrical
connections to the Model 7100E oxygen analyzer.
DANGER: The Model 7100E analyzer is not rated intrinsically safe or explosion proof. Be certain that no
flammable gases are present in the area where the Model 7100E analyzer will be installed.
CAUTION: The Model 7100E housing is not rated waterproof. Do not mount the analyzer or the sensor in
an area where it may contact water or other liquid elements.
WARNING: Be certain that all power is OFF to the analyzer and associated wiring (cables) before
attempting installation. DO NOT WORK WITH LIVE WIRES! Do not leave any exposed wire at the
terminal blocks. Before applying power, ensure terminal blocks are fully inserted into the mating
connector at the analyzer.
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