GX-6000 Operator’s Manual
Appendix I: 11.7 eV PID Sensor • 233
Description
Instrument
A GX-6000 that contains an 11.7 eV PID sensor is shipped with a black rubber cap
plugging the inlet fitting. This rubber cap helps prolong the life of the 11.7 eV PID sensor
by preventing ambient moisture from entering the flow system. This rubber cap should be
installed back onto the inlet fitting before storing the GX-6000. See “Turning Off a GX-
6000 with an 11.7 eV PID Sensor” on page 235 for complete storage recommendations.
Sensor
The PID sensor is a cylindrical sensor with a diffusion opening on the front and 3 pins on
the back. It is installed in a white housing that has three sockets on the bottom that mate
with the GX-6000 instrument. The PID sensor must always be installed in the first smart
sensor position which is located in the top left corner of the sensor block.
The 11.7 eV PID sensor’s lamp is susceptible to humidity. “Turning Off a GX-6000 with
an 11.7 eV PID Sensor” on page 235 outlines RKI Instruments, Inc.’s recommendations
for prolonging the life of the sensor’s lamp.
Dehumidifier Filter
Every GX-6000 that contains an 11.7 eV PID sensor is shipped with a calcium chloride
dehumidifier filter. The dehumidifier filter is shipped with clear tubing connecting both
ends together to preserve the life of the filter. Remove the tubing from one end of the filter
and draw through the filter before turning off the GX-6000 in order to purge any moisture
from the flow system.
The filter should be replaced when it appears wet.