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GrainPro® Cocoon Indoor™ Instruction Manual
MA4044RAD1114-7
5.7. USING CARBON DIOXIDE ANALYZER FOR MONITORING (WITHOUT CO
2
FLUSHING)
The GrainPro CO
2
Analyzer uses a non-dispersive infrared radiation (NDIR) sensor for the detection
of carbon dioxide. When a sensor encounters a target gas, voltage signal is generated in proportion
to the gas concentration. This voltage signal is amplified, digitized and displayed on the instrument’s
OLED display.
5.7.1. Using the carbon dioxide analyzer:
a. During the first 15 days of installation,
carbon dioxide level should be checked
daily using the CO
2
analyzer.
b. Succeeding monitoring should be done
twice a week. Carbon dioxide levels
should increase to a level greater than
10%. Carbon dioxide level may go up to
15% or more. When decrease in CO
2
level
is observed, sealing is probably
compromised and the commodity may not
be adequately protected.
5.7.2. Monitoring of carbon dioxide level is recommended to ensure control of insect infestation.
Details of using CO
2
analyzer are discussed in the analyzer’s instruction manual.
5.8.
USING CARBON DIOXIDE ANALYZER FOR MONITORING (WITH CO
2
FLUSHING)
5.8.1. Recommended pest reduction timeline:
a. Leave the Cocoon closed for 15 days at 35% CO
2
concentration (minimum) or 50% CO
2
for 10 days to eliminate all life stages of insects and achieve best results.
b. When storing commodities, leave the Cocoon sealed until it is unloaded completely.
5.8.2. Using the carbon dioxide analyzer:
a. During the first 15 days of installation,
carbon
dioxide
level
should be
checked daily using the carbon
dioxide analyzer.
