200 • Appendix G: Infrared Sensors
GX-6000 Operator’s Manual
CO
2
Scrubber
A carbon dioxide scrubber is factory-shipped with GX-6000s that have an IR CO
2
sensor
installed.
The scrubber is for use when setting the carbon dioxide sensor’s zero reading only. A
single piece of tubing connects both ends of the scrubber when not in use. To prolong the
life of the scrubber, be sure the tubing is connected to both ends of the scrubber while the
scrubber is not in use or while it is being stored. Replace the scrubber when you notice the
pellets in the scrubber tube beginning to break down into powder.
Figure 43: Carbon Dioxide Scrubber
VOC Zero Filter
If you instrument has an IR CO
2
sensor and a PID sensor installed, a VOC zero filter is
included as standard. The VOC zero filter scrubs out low levels of VOC gases using
charcoal. Use the VOC zero filter when performing a fresh air adjustment on the
instrument.
The filter comes with a tubing stub and plug on each end. Both plugs must be removed
before using the filter and must be reinstalled for storage. The filter does not have a
preferred flow direction.
Figure 44: VOC Zero Filter
Filter
Plug
Tubing Stub
Tubing Stub
Plug
To GX-6000