RKI Instruments GX-82A User Manual

Page 34

Model GX-82A Instruction Manual

062796

RKI Instruments, Inc.

4. To replace individual sensors, press down and turn counter-clock-

wise, then pull out of block. Figure 2 shows the installation of the
CO sensor with filter; do not use the filter with other sensors.

5. Insert a new sensor and turn clockwise. Be sure to use the correct

socket for the sensor type; sensors are not interchangeable
between sockets.

6. Reinstall the cover.

7. Turn on the instrument and verify the display is normal.

8. Calibrate the detection circuit to work correctly with the new sen-

sor.

CO Filter

CO sensors are equipped with an activated carbon filter disk that
removes H

S and most hydrocarbons to limit interference with the CO

measurement.

Replace the filter when CO readings become suspect (e.g., CO circuit
calibrates properly, but shows response in a known CO-free
environment), or when replacing sensor, whichever comes first. See
Figure 2.

Rubber Collar

Filter (CO only)

CO Sensor

Sensor

Figure 2. Sensor Installation

(CO only)

Block