7.15
7.6 4900D analyser performance
Sample requirements
For best performance the flow supplied to the analyser should be kept at a constant value for
both normal sampling and for calibration gas input.
Temperature: 5 to 60°C / 41 to 140°F
Dew point: 5°C / 9°F below minimum ambient
Condition: Oil free, non - condensing, filtered to 1m
Vent: Each gas outlet should be connected to a separate
atmospheric vent, free from any back-pressure.
(Consideration should be given to the toxicity and
asphyxiant nature of the sample gas when selecting a
vent location).
Inlet Flow: 500 (min) - 1500 (max) ml/min (for each stream)
Inlet Pressure: Up to 1psig (7kPa) to provide specified flow rate.
WARNING
This analyser (4902D and 4904D) is not suitable for use with flammable or corrosive
samples.
If toxic samples are present, the maximum pressure to the analyser must be limited
to 5psig by means of a suitable release system.
CAUTION
Do not exceed the rated sample flow as sensor damage may result.
Do not exceed the sample temperature and dew point criteria as analyser sensor
damage will result.
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