GX-6000 Operator’s Manual Maintenance • 250
7 . Use the SHIFT ▼ (PANIC) button to place the cursor next to the
NORMAL MODE menu option, then press and release the POWER/
ENTER button to return to Measuring Mode.
Maintenance
PID Sensor Maintenance
See “PID Sensor Maintenance” on page 124 for PID sensor maintenance
instructions keeping in mind the following differences in spare parts.
Replacing a Tube
When to Replace Tube
RKI Instruments, Inc. recommends that the tube be replaced before starting a
new measurement in Benzene Select Mode. If discoloration of the filter
material extends beyond the “3/4” line (into the side without the text and
arrow), the tube needs to be replaced. Even though discoloration can be a
measure of when to replace the tube, not all gases cause the filter material to
discolor which is why RKI Instruments, Inc. recommends that the tube be
replaced before starting a new measurement in Benzene Select Mode.
If the tubes are being stored in a refrigerator, take them out of the refrigerator
and let them sit overnight before using them.
Instructions to Replace Tube
1 . Remove the front of the tube holder by pushing on the locking
mechanism and pulling the front half away from the back half, shown
below.
Figure 47: Replacing a Tube
Part Number Description
33-0563 PID sensor electrode stack, 10.0 eV/benzene sensor
51-1503 PID sensor replacement lamp, 10.0 eV/benzene sensor
PID-003L PID sensor, 10.0 eV/benzene
Push
Pull
Back Half Front Half
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