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GrainPro
®
Carbon Dioxide Analyzer Instruction Manual
MA4068RAD0718 - 2
9.
FREQUENTLY ASKED QUESTIONS
9.1. What is the GrainPro
®
Carbon Dioxide (CO
2
) Analyzer?
Carbon Dioxide (CO
2
) Analyzer is an instrument used to measure the Carbon Dioxide (CO
2
)
concentration.
9.2. For what purpose is a CO
2
Analyzer used?
Carbon Dioxide (CO
2
) Analyzer is used to monitor process, enhance safety, increase efficiency,
and improve quality.
9.3. What is the sensing method used in GrainPro
®
Carbon Dioxide (CO
2
) Analyzer?
The sensing method used in GrainPro
®
Carbon Dioxide Analyzer is through nondispersive
infrared measurements.
9.4. What is a micro-processor instrument?
It has a data logging capacity, can store data in real time, and has a provision to download the
stored data to a computer.
9.5. What kind of sensor is used in GrainPro
®
Carbon Dioxide (CO
2
) Analyzer?
It uses Nondispersive Infrared (NDIR) sensor which is used to analyze gases.
9.6. What is a Nondispersive Infrared (NDIR)?
It is a simple spectroscopic (study of infrared light dispersed according to its wavelength) sensor
often used as a gas detector. It is nondispersive in the sense of optical dispersion since the infrared energy
is allowed to pass through the atmospheric sampling chamber without deformation.
9.7. Does CO
2
Analyzer need maintenance and calibration?
Yes. Maintenance and care are needed to sustain the product life of the instrument (see 6). For
the calibration, there are two types: Zero calibration and Span Calibration. Zero Cal shall be done using
ambient condition or by using pure nitrogen, while Span Cal shall be done using 50% CO
2
concentration.
9.8. What is Calibration?
Calibration verifies that the Analyzer is operating properly and adjusts for any drift or loss of
sensitivity. The process involves passing two certified concentrations of the target gas - one for Low/Zero
Point and other for High/Span Point - usually from a calibration gas cylinder and allowing the Analyzer to
adjust for drift in the reading.
9.9. What is Purging Air?
Purging Air is used to flush clean air before the actual reading. This ensures that the functionality
of the CO2 Analyzer is not affected or damaged by the contaminants from the surrounding environment.
10. WARRANTY CLAUSE
GrainPro
®
hereby warrants that product sold to Buyers shall be free of defects in workmanship and materials,
for a period as follows, starting from the date of shipment (B/L): One year for the GrainPro
®
Carbon Dioxide
Analyzer.
The warranty liability is l
imited to replacement of defective products within the warranty period at GrainPro’s
plant in accordance with the provisions specifically and expressly set forth herein.
