GX-6000 Operator’s Manual
Chapter 6: Maintenance • 117
8. Reinstall the filter holder. Align the two wide tabs on the bottom of the filter holder
with the two wide slots in the case where the filter holder fits. Push the filter holder
into the case and turn it 1/4 turn clockwise until it snaps into place.
PID Sensor Maintenance
The PID sensor includes user serviceable parts. They are the lamp and the electrode stack.
The following sections include procedures for cleaning the lamp, replacing the lamp, and
replacing the electrode stack.
Cleaning the PID Sensor’s Lamp, 10.0 eV and 10.6 eV Lamps
Clean the lamp if you notice a significant drop in sensitivity from one scheduled
calibration to another or if you are not able to calibrate the PID channel. See Table 16 on
page 128 for lamp cleaning kit ordering information. The lamp cleaning kit for the 10.0
eV and 10.6 eV PID sensors includes the following items:
•
an electrode stack removal tool
•
a small vial of aluminum oxide powder
•
40 cotton swabs
•
10 finger cots
CAUTION:
The aluminum oxide cleaning kit is only for use with the 10.0 eV and
10.6 eV PID sensors’ lamps. An anhydrous methanol cleaning kit is used to
clean the 11.7 eV PID sensor’s lamp. DO NOT USE THE ALUMINUM
OXIDE CLEANING KIT TO CLEAN THE 11.7 eV PID SENSOR’S LAMP!
See “Appendix I: 11.7 eV PID Sensor” on page 232 for 11.7 eV lamp
cleaning kit information.
Perform the following procedure to clean the PID lamp:
1 . Verify that the GX-6000 is off.
2 . Use a small Phillips screwdriver to unscrew the four screws holding the flow
chamber to the rest of the GX-6000’s case.
3 . Grasp the sides of the flow chamber and lift it away from the rest of the case. The
screws are captive screws and will not come out of the flow chamber.
4 . Gently pull up the edges of the sensor gasket to loosen it from its connections. Be
sure not to lose any of the filters that are in it. The sensors will be exposed.
5 . Locate the PID sensor.
6 . Grasp the sensor firmly and pull it out of its socket.
7 . Place the PID sensor face down on a flat clean working surface.
NOTE:
Do not touch the lamp window with your fingers as this may contaminate the
window with finger oil. At this point it is recommended that the finger cots be
used on the fingers handling the lamp. Finger cots are included with the lamp
cleaning kit.