Preparation for Installation 29
Fidas24: Preparation for Installation
Sample gas
Sample Gas Inlet Conditions
Temperature
Thermostat temperature (thermostat temperature for
sample gas path, detector and air jet injector 200 °C,
pre-set ex works to 180 °C)
Inlet pressure p
abs
= 800 to 1200 hPa
Flow Approx. 80 to 100 l/h at atmospheric pressure
(1000 hPa)
Note: Sample gas temperature, pressure and flow rate should be
maintained constant to such a degree that the fluctuation influence on the
accuracy of measurement is acceptable (see also Chapter "Analyzer
Module Operating Data").
Sample Gas Outlet Conditions
The outlet pressure must be the same as the atmospheric pressure.
Flammable gases
The gas analyzer may be used for the measurement of flammable gases
provided that the flammable portion does not exceed 15 vol.% CH
4
or
C1 equivalents.
Process gases
Instrument air
Quality as per ISO 8573-1 Class 2 (max. particle size 1 µm,
max. particle density 1 mg/m
3
, max. oil content
0.1 mg/m
3
, dew point at least 10 °C below the lowest
expected ambient temperature)
Inlet pressure p
e
= 4000 ± 500 hPa
Flow typically approx. 1800 l/h (1200 l/h for air jet injector and
approx. 600 l/h for housing purge), maximum
approx. 2200 l/h (1500 l/h + 700 l/h)
Combustion air
Quality Synthetic air or catalytically cleaned air with an organic
C content < 1 % of span
Inlet pressure p
e
= 1200 ± 100 hPa
Flow < 20 l/h
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