Bio-Science CI-900, Operation Manual, Page: 19 / 94

CI-900 Instruction Manual 8/10/2015
1554 NE 3
rd
Ave, Camas, WA 98607, USA Phone: (360) 833-8835
sales@ cid-inc .com www.cid-inc.com
14
Measure Menu: Taking a Measurement
To begin taking measurements, select the Measure Menu by pressing the RIGHT arrow key when
Measure is highlighted on the Main Menu display. Make sure the IN and OUT ports on the front
panel of the instrument are clear from any obstructions. Create and open a file before starting a
measurement, otherwise the default filename on the SD card is File01.
If sampling ambient air, turn the unit on and leave the front ports free of obstruction. If sampling a
container or pallet, connect the Viton tubing to the “In” port and place the end of the tubing into the
container or pallet to be sampled. If using the CI-900RK, place the fruit to be sampled in the fruit
chamber, and connect it to the IN port on the unit. It is up to the specific setup whether the OUT
tubing is connected to the OUT port with Chamber Out filled with potassium permanganate
(KMnO
4
) and set to “on”. If left disconnected from the OUT port, the fruit chamber is allowed to
replenish with ambient air.
Sensor Stability
The CI-900 will begin to warm-up. The CI-900 will display the “Sensor Stability” screen after
pressing the RIGHT arrow to get into the Measure Menu. The display will show the File that is open
and the Flow of gas being pumped through the instrument. Below this will be whether the
initialization is automatic or manual.
If the initialization is automatic, the CI-900 will precede
directly to the measurement (Graph Mode) once the sensors have stabilized . If the
initialization is manual, Monitor Mode will not be triggered until the user presses the right arrow to
enter Monitor Mode.

Press the DOWN arrow key to switch between automatic and manual initialization.

Press the RIGHT arrow to skip the Sensor Stability screen and proceed to the Graph Mode
display.
If the offset autocorrection feature is enabled, then the unit will run the set zero process
automatically every 24 hours (or at the user defined time interval). The offset autocorrection
utilizes Chamber Out, which should be left full of KMnO
4
even if Chamber Out is set to “off” during
normal measurements. For more details on the offset autocorrection, see the Setup>Calibration
menu on page 34.
NOTE: The CI-900 ethylene analyzer sensors should be given 24 hours to stabilize after being on an
airplane. Start a measurement and enable the closed loop (ON) and allow the instrument to
measure for 24 hours.