82 • Replacing the Hydrophobic Disk Filter, GX-2003 Operator’s Manual
CAUTION:When replacing a sensor, verify that the sensor is properly
aligned with its socket before inserting it into the socket. The CO
and H2S sensors have alignment slots which match up with
alignment tabs in the sockets. The combustible sensors each have
two non-polarized contacts which must line up with the
contacts in their socket. Forcing a sensor into its socket may
damage the sensor or the socket.
6. Place the flow chamber in position over the sensor area and press
it into the case until it is flush with the back of the case.
7. Secure the flow chamber to the GX-2003 with the three screws
removed in step 2.
8. Start up the GX-2003 by pressing and briefly holding the POWER
ENTER button.
9. Calibrate the new sensor as described in “Calibration Mode” on
page 38.
Replacing the Hydrophobic Disk Filter,
Cotton Filter, and Wire Mesh Disk
1. Verify that the GX-2003 is off.
2. Locate the clear plastic filter holder at top of the GX-2003.
3. Grasp the filter holder and turn it about 1/8 of a turn
counterclockwise.
4. Pull the filter holder away from the case. Inspect the cotton dust
filter and replace if dirty.
5. The hydrophobic disk filters and wire mesh disk are located in the
case and are retained by a rubber gasket. Pull out the rubber
gasket with needle nose pliers.
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