RKI Instruments Gas Tracer - Manual (Page 196)

188 • Replacing the Hydrophobic Disk Filter, Gas Tracer 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
sensor has alignment slots which match up with alignment tabs
in the socket. 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.
8. If a dummy sensor is installed, be sure that it is installed correctly.
Make sure the flat side is up and the hollow side is down.
9. Place the sensor gasket and filters back into the chamber ensuring
that it seals with the sensors and the edge of the chamber.
10.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.
11.Tighten the top screw of the flow chamber completely.
12.Place the belt clip into position and tighten the three screws
retaining it.
13.Start up the Gas Tracer by pressing and briefly holding the POWER
ENTER button.
14.Calibrate the new sensor as described in “Calibration Mode” on
page 61. If the ppm combustible sensor has been replaced, you
must perform a DRY air adjustment, a WET air adjustment, and a
WET span adjustment.
Replacing the Hydrophobic Disk Filter,
Cotton Filter, and Wire Mesh Disk
1. Verify that the Gas Tracer is off.
2. Locate the clear plastic filter holder at the top of the Gas Tracer.
3. Grasp the filter holder and turn it 1/4 turn counterclockwise.
4. Pull the filter holder away from the case. Inspect the cotton dust
filter and replace if dirty.