RKI Instruments GasWatch 1 - Manual (Page 16)

12 • Maintenance GasWatch Instruction Manual (Two-Gas)
3. If the calibration/response difficulties continue, replace the affected sensor as
described later in this section.
4. If the calibration/response difficulties continue after you replace the sensor, contact
RKI Instruments, Inc., for further instruction.
Replacing Components of the GasWatch
This section describes procedures to replace the sensor, sensor dust cover, and batteries.
WARNING: Perform the procedures described in this section in a non-hazardous
environment.
Replacing the sensor
1. Verify that the GasWatch is off.
2. Loosen the two screws that secure the sensor retainer to the GasWatch, then remove
the sensor retainer.
3. Unplug the sensor from its socket.
4. Plug the replacement sensor into the socket.
CAUTION: Verify that the sensor is properly aligned with the socket when plugging in the
sensor. “Forcing” the sensor in place may damage the sensor or socket.
5. Place the sensor retainer in its original position, then secure it to the GasWatch with
the two screws you loosened in step 2.
6. Start-up the Gas Watch as described on page 4.
7. Calibrate the new sensor as described on page 9.
Replacing the sensor dust cover
1. Use a screwdriver or your fingernail to gently pry each side of the retaining strip
away from the sensor dust cover.
2. Remove the sensor dust cover, then insert the replacement dust cover in its place.
3. Reattach the retaining strip in its original position.
The GasWatch housing includes two recessed tabs on each side of the sensor dust
cover that allow the retaining strip to “snap” into place.
Replacing the batteries
1. Verify that the GasWatch is off.
2. Turn the GasWatch over to expose the battery compartment.
3. Loosen the captive screw that secures the battery compartment door, then remove the
door.
4. The batteries may be attached to the opposite side of the door, or they may remain in
their sockets.
5. Remove the batteries, then place the replacement batteries in the battery sockets.
Position the batteries so the positive (+) side of the batteries are facing up.
6. Place the battery door in its original position, then secure it with the captive screw.
7. Start-up the Gas Watch as described on page 4, and verify that it is operating correctly.