RKI Instruments GX-94 - Manual (Page 47)

GX-94 Operator’s Manual Page 46
1. Take the GX-94 to a non-hazardous location and turn the power
off.
2. Remove the four (4) Phillips screws from the bottom of the instru-
ment. (Two in the belt clip and two next to the label.)
3. Pull the top and bottom case apart where the rubber cushion cov-
ers the seam. This opens the entire case.
4. Remove the sensor gasket from the sensors.
5. To replace individual sensors, gently unplug from the circuit board
by pulling straight up.
6. Carefully insert a new sensor. Be sure to sure to place the sensor
in the correct position; sensors are not interchangeable between
positions.
7. Reinstall the sensor gasket on the sensors.
8. Reinstall the cover, belt clip, and screws.
9. For Oxygen, CO, and H2S sensors, wait up to 1/2 hour for the sen-
sors to stabilize. Combustible sensors need no stabilization period.
Turn on the instrument and perform a demand zero using the AIR/
▲ button.
10. Calibrate the channels with the new sensors (see Calibrating the
GX-94).