Bio-Science CI-900, Operation Manual, Page: 50 / 94

CI-900 Instruction Manual 8/10/2015
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rd
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KMnO
4
will turn from purple to brown when it expires and needs replacement. The silica gel
has an added color indicator that changes from blue to pink when replacement is necessary.
To use Chamber Out to condition the air replenishing the fruit chamber, enable Chamber Out in the
Setup>Chamber menu and fill Chamber Out with the appropriate consumable. Connect the fruit
chamber hoses to both the IN
and OUT ports on the front of the
CI-900.
Figure 16: The back of the CI-900 with removable and refillable containers for distilled water and
KMnO
4
(left) and a diagram showing the flow path of the gas stream (right).
Chamber In is on the right side of the back panel. This chamber can be enabled in 2 different modes.
Chamber In should be filled with distilled water to help filter out interfering gases in the air stream.
By passing the gas sample through the water, polar molecules are trapped or filtered from the
airstream. Using Chamber In with distilled water as a filter can help reduce the interference
measured when alcohol or other light polar molecules (known interfering gases for the CI-900
electrochemical sensor) are present. Also, using the water trap can help keep the electrochemical
cell hydrated, with longer periods of time between needing to refill the electrochemical sensor.
There are 3 options for Chamber In in the Setup>Chamber menu.