2.19
configuration analyser. These include needle valves to regulate the flow through the
Gfx transducer. The flow through the Gfx transducer should not exceed 2.0 l/min.
Where the optional needle valves are not used then external provision to limit the
sample flow to 2.0 l/min should be provided.
The dual stream analyser configuration may only be used with external calibration
valves. It is not possible to use the optional internal calibration manifold in this
configuration.
2.10 Sample gas condition
WARNING
C Verify that connections are leak free at full operating pressure before
applying sample or calibration gases. These gases may be toxic or
asphyxiant.
C Consideration should be given to the toxicity and asphyxiant nature of
the sample gas when selecting a vent location.
Table 2.9 Sample gas conditions
Sample pressure 1-5 psig / 7 - 34 kPag. Externally regulated to
provide correct transducer flow rate.
Temperature Up to 60 °C
Conditions Oil free, non-corrosive, non-condensing
Flow rate Paramagnetic transducer 50-250 ml/min
Gfx transducer 500-1500 ml/min
Particulates Filtered to remove particles exceeding 1 µm
Dew point 5 °C / 9 °F below lowest ambient temperature
CAUTION
Do not exceed the rated flow or pressure as transducer damage may result! This
is especially important for paramagnetic transducers!
NOTE
For best performance the flow, or pressure, supplied to the analyser should be
kept at a constant value for both normal sampling and for calibration gas input.
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