2
Installing the New IR Sensor
7. Carefully remove tubing and electrical connectors from old IR sensor. See Figure 2.
8. Cut off two cable ties that secure IR sensor to chassis, and remove sensor from instrument.
9. Place new IR sensor inside chassis, positioning its 10-pin electrical connector toward the
rear
of the
instrument. Rotate the sensor so that its gas inlet and outlet fittings and its electrical connectors are
positioned as shown in Figure 2.
10. Remove protective caps from the gas inlet and outlet fittings of the new IR sensor.
11. Connect the 12-conductor ribbon cable from IR SOURCE connector J5 on main board to IR sensor
emitter connector (front of instrument).
12. Connect the 10-conductor ribbon cable from DET connector J6 on main board to IR sensor detector
connector (rear of instrument).
13. Using the two supplied cable ties, secure the IR sensor to the chassis by threading each cable ties
through its cable-tie mount; around the foam insulation that surrounds the IR sensor; and around the
12-conductor ribbon cable. Cut off the cable-tie excess.
14. Connect tubing from pump to the IR sensor gas inlet fitting, and connect the IR sensor gas outlet fitting
to the instrument’s exhaust port as shown below.
IR SENSOR
Figure 2.
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