CAI 700 NDIR, Руководство оператора

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700 NDIR Analyzer 6-20-2017
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Sampling Requirements
Filtration
Dust must be eliminated completely in the sample stream. Use filters as necessary. The
final filter must be capable of removing any particles larger than 4 microns.
Condensation
The dew point of the sample gases must be lower than the instrument temperature to
prevent accidental condensation within the instrument. If necessary, bypass the sample
through a dehumidifier to reduce the dew point to 4°C or less. If the sample contains an
acid mist, use an acid mist filter, cooler or similar device to remove all traces of the mist.
Presence of Corrosive Gases
The useful service life of the instrument will be shortened if high concentrations of
corrosive gases such as Cl
2
, SO
2
, F
2
, HCl etc. are present in the sampled gas.
Gas Temperature
When measuring high-temperature gases, make sure that the maximum temperature
rating of the instrument 104ºF (50ºC) is not exceeded.
Pressure and Flow Rates
If the analyzer is using the optional sample pump, do not introduce a pressurized sample.
The optional standard pump is capable of drawing a sample through a ¼-inch heated
sample line of approximately 75 feet. The calibration gas cylinder pressures should be set
at 25 PSIG for delivery into the optional zero and span inlets located on the rear panel.
CAUTION: If the analyzer contains an optional internal sample pump, the
introduction of a pressurized sample gas in excess of 1.5 PSIG will damage the pump.