infrared industries FGA, Руководство оператора

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C A L I B R A T I O N
The analyzer as shipped has been calibrated at the factory and is designed to maintain calibration accuracy for extended
periods of operation. Due to the sophisticated circuitry used in the analyzer, frequent calibration is not required.
However, we recommend a gas calibration about every six months to ensure the integrity of the analyzer. Some states
have regulations governing the time intervals between calibrations. It is important to comply with the governing
regulations for your locality.
NOTE: When using calibration gas, the bottle should be kept at about 21°C [70°F] for 8 hours prior to
use. Sudden temperature changes can condense some of the components in the bottle, changing their
concentration.
C A L I B R A T I O N G A S A N D R E G U L A T O R
A bottle of calibration gas is required to check analyzer calibration and to perform calibration. For the high-pressure
cylinders of gas, a regulator is needed to monitor the pressure of the calibration gas bottle and to regulate it to the
pressure required for testing and calibration. An output pressure to the analyzer of 2~4 psi is all that is needed to
perform a calibration. The key to a good calibration is to wait for the reading of the calibration gas on the analyzer to
stabilize before progressing on to the next step.
Calibration gas has a known concentration of HC, CO, and CO
2
. The gas is available in a range of concentrations. We
recommend using calibration gas of the following concentrations when checking or calibrating the FGA4000XDS Gas
Analyzer
For a 4-Gas Analyzer use BAR90 Mid or:

HC (propane) - 1500ppm

CO
2
- 12%

CO 4%

Balance N
2

For a 5-Gas Analyzer use BAR97 High or:

HC (propane) – 3000ppm

CO2 – 12%

CO – 8%

NOX – 3000ppm

Balance N
2
NOTE: We list balance N2 here because we recommend that O2 be calibrated using air during AUTO-
ZERO.
If you choose to use cal gas with different concentrations, it must be within the following ranges:

HC (propane) 140 ppm to 3400 ppm

CO
2
5% to 15%

CO 0.9% to 8.5%