Bio-Science CI-900, Operation Manual, Page: 24 / 94

CI-900 Instruction Manual 8/10/2015
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rd
Ave, Camas, WA 98607, USA Phone: (360) 833-8835
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Auto-Escape Feature
An upper limit auto-escape feature acts as a safety feature of the unit. This safety feature is always
on. If the sensor detects over 200 ppm ethylene, the CI-900 will auto-escape from monitor mode to
prevent poisoning of the electrode. This will stop the measurement. If the sensor becomes
poisoned, it will continually auto-escape with the error message "sensor out of bounds". If this
happens, use potassium permanganate (KMnO
4
) in Chamber Out and set the instrument to Closed
Loop. This will begin to clean the gas inside the instrument. If possible, the CI-900 ethylene analyzer
should be removed from the high concentration environment.
Flow Block Error
The display may show “flow blocked” and a very low flow rate (less than 40 ml/min) for several
reasons. If this message appears on the display of the CI-900, ensure that the intake on the front of
the CI-900 is free from obstruction and not covered. If connected to tubing or a fruit chamber,
disconnect and reconnect the tubing from the In port.
If using water in Chamber In, remove the top panel of the CI-900 and ensure no water has entered
the CI-900. There is a white hydrophobic filter directly down the flow path Chamber In to be
checked for water, as well as a hydrophobic filter near the in port on the front of the CI-900. If
water is found inside the tubing or filters, STOP the measurement and allow the instrument to dry
out. Be careful no further water damage occurs when turning the pump back on.
No SD card Present
If the autosave is enabled and no SD card is present, the user will be notified by seeing “INSERT SD
CARD OR HIT ENTER KEY”. After enter is pressed, “NO SD CARD” is visible on the Sensor Status
display where the FILE and filename usually are. Pressing any other button besides ENTER, will
return to the main menu. Each time the CI-900 tries to autosave, the unit will flash “write error”
instead of “saved” at the top of the display.
CI-900RK: Using the Research Kit Fruit Chamber
To use the CI-900 Research Kit in the field or laboratory, attach a hose of the chamber wand to the
IN port on the front panel. Slide the end of the wand into the chamber and tighten the thumb-screw.
Make sure the connection is snug. The fans inside the chamber will begin to spin when the
connection is established. The fruit chamber available is 2L in volume. The chamber either has a
flat-bottom or a bottom-slit to allow for non-destructive sampling. A fruit stem or petiole that is
attached to the plant is passed through the slit and then closed in the chamber. This allows C
2
H
4
levels to be recorded during ripening without damaging the fruit. Leaf chambers available for the
CI-340 Photosynthesis System, from CID Bio-Science, Inc. are compatible and interchangeable with
the CI-900 Research Kit.