Technical information

APPENDIX C

3/31/2008 Rev. 4.3 C - 5

Use the same procedure described under Operating Instructions – “Adding Consumable” to refill the

soda lime tube. Replace the filters (see Filters section below). Remember to gently tap the tube to

help settle the material. Keep all containers of fresh soda lime tightly sealed to prevent absorption of

ambient CO

Silica Gel

The silica gel should last from four to eight hours of operation under most circumstances. Actual

operating time will depend on ambient humidity levels. The silica gel supplied is a beaded, dust-

minimizing material of an indicating variety. The fresh material is dark blue and turns yellow as it

nears exhaustion. The relative humidity of the output of the CI-301AD will increase as the silica gel

becomes exhausted. When this happens, replace the silica gel.

Use the same procedure described under Operating Instructions-Adding Consumable to refill the

silica gel tube. Replace the cotton ball filters (see Filters section below). Remember to gently tap the

tube to help settle the material. Keep all containers of fresh silica gel tightly sealed to prevent

absorption of ambient moisture.

The used silica gel may be discarded or dried in an oven. If the material is dried, it should be placed

in a sealed container before cooling. Note that the indicator incorporated into the silica gel may not

function properly after this process, even though the silica gel itself may be dry.

Water

Water should be added if the level falls significantly. Change the water if it becomes cloudy or

contaminated in any way. Empty the water tube if the CI-301AD is not used for more than one or two

days.

CO2 Cartridge

Screw the CO

cartridge into the regulator. Set the regulator to 6 psi. The cartridge may seem to be

tight before it is punctured, so make sure to tighten until there is pressure indicated on the meter. The

regulator must be set to “LO” to get a reading on the meter.

Filters

The cotton ball filters located at each end of the soda lime and silica gel tubes become clogged with

fine particles and must be replaced. These filters should be replaced each time the chemicals are

changed.

It is extremely important that the filters be kept clean at all times. The first indication of a clogged

filter will be instability in the output of the CI-301AD. This may be followed by a reduction in the

available flow.