Bio-Science CI-900, Operation Manual, Page: 49 / 94

CI-900 Instruction Manual 8/10/2015
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Setup Chamber
The Setup>Chamber menu allows you to turn on/off the in-line conditioning columns on the back of
the instrument.
The settings in Setup>Chamber are the default settings to be used to start a
measurement. Once a measurement is in process, conditioning chambers can be turned on/off in
the Measurement>Settings menu. The removable plastic containers are used to hold the
consumables potassium permanganate, distilled water, soda lime, and silica gel.
Keep the plastic
containers on the CI-900, even when empty, to protect the brass intakes. Always ensure the
conditioning chamber is seated properly when screwing it on the CI-900.
The purpose of the inbound chamber, Chamber In is to condition the air before it reaches the
sensor. Chamber In additionally provides a “special mode” where distilled water is used to filter out
alcohols before the electrochemical sensor. The use of distilled water in the Chamber In is referred
to as PolarCept.
It is recommended to use PolarCept (Chamber In: Special) for most ethylene
measurements. PolarCept is intended for distilled or deionized water only.
Figure 15: Solids Chamber and Water Chamber on back of instrument.
Chamber Out is on the left of the back panel. Chamber Out is the last chamber before the gas OUT
port. If the Outlet gas stream is connected to the field kit chamber or to the inlet of the unit, it can be
used to condition the incoming gas after it leaves the sensor.
Chamber Out is used with
potassium permanganate (KMnO
4
) for cleaning water and zero calibration of ethylene
sensors.
Enabling Chamber Out, the CI-900 can use soda lime to remove CO
2
from the gas stream. Similarly,
silica gel is used to scrub water from air and create a 0% relative humidity gas. Most commonly,
potassium permanganate is used to remove hydrocarbons from the gas stream. KMnO
4
beads (not
dust) should be sourced locally by the user.