APPENDIX C
CI-301AD ADJUSTABLE H2O AND CO2 CONTROL MODULE
GENERAL DESCRIPTION
The CI-301AD provides a gas source with a CO
2
concentration adjustable from approximately 0
to 2000 ppm at flow rates up to 0.5 lpm. The unit also allows adjustment of the gas humidity
level from approximately 5% relative humidity to 20-30% above ambient humidity levels up to
95%. The CI-301AD uses a CO
2
cartridge and soda lime to regulate CO
2
levels, and silica gel and
water to control humidity.
Figure C-1. Illustration of CI-301AD Adjustable H
2
O and CO
2
Control Module.
OPERATING INSTRUCTIONS
Adding Consumables
Before operating the CI-301AD, the proper consumable materials must be loaded. For full
operation (control of CO
2
and humidity), the unit requires a CO
2
cartridge, soda lime (CO
2
absorbent), silica gel (desiccant) and water. The soda lime, silica gel and water must be placed
in the correct tubes.
NOTE: When it is not desired to use the humidity control feature, it is unnecessary to add
silica gel or water. In this case, the H
2
O control knob should be in its minimum (fully
counterclockwise) position to conserve power.
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