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
37
Sensitivity Correction
The sensitivity correction is for adjusting the internal gain value of the C
2
H
4
sensors. Ethylene gas
standards are required. The Sensitivity Correction feature is currently in process and will be
completed in a future version of firmware.
CO
2
Calibration
To access the Calibrate CO
2
feature of the CI-900, press the RIGHT arrow key when Calibration is
highlighted on the Setup Menu. Press enter to continue to the Calibration mode. Select the CO
2
sensor to be calibrated (PPM or
PCT).
The CO
2
sensor needs to be enabled in the Setup>Sensor menu to access the Setup>CO
2
menu. To
calibrate the CO
2
PPM sensor, 400 ppm or 600 ppm standard CO
2
gas is recommended. To Calibrate
the CO
2
PCT, 4-20% CO
2
is recommended. Allow the gas to run for 20-30 minutes before calibration.
Calibration Parameters
will display the coefficients from the previous calibration.
Re-calibration
allows the user to re-calibrate the sensor, setting a new zero and span for the
selected sensor.
CO
2
PPM zero calibration is recommended daily. CO
2
PCT zero calibration is
recommended every six months.
However, if the unit is in an environment where the
temperature fluctuates frequently, zero calibration may be necessary more often than the
recommended intervals. Alternatively, a CO
2
scrubber such as soda lime can be placed in Chamber
OUT.
Turn the ethylene sensors on for the CO
2
calibration.
Directions for using a buffer system in
place of a standard gas may be found at the end of the section.
CO2 CALIBRATION
CO2 PPM
CO2 PCT
Summary of Contents for CI-900
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