Installing the Gas Analyzer
71
Connection of Process Gases and Test Gases
H
2
H
2
N
2
CH
/N
nm
2
Switch-over station
with safety valve
Instrument air
p = 4000 ± 500 hPa
e
Span gas
p = 1000 ± 100 hPa
e
Zero gas
Combustion gas
p = 1200 ± 100 hPa
e
Exhaust gas
Pneumatic
shut-off valve
Combustion air
p = 1200 ± 100 hPa
e
Flow
restrictor
34
33
36
38
37
35
The numbering of the gas connections corresponds to the numbering in
the connection diagram (see page 66) as well as the labeling on the rear
of the analyzer module.
Instrument Air Connection
Instrument air is used as propellant for the air jet injector and as purging
air for the housing purge (see page 34).
Connect (see page 66) the instrument air line to the instrument air inlet of
the analyzer module via a pressure regulator (0 to 6 bar).
Combustion Air Connection
Connect (see page 66) the combustion air line to the combustion air inlet
of the analyzer module via a pressure regulator (0 to 1.6 bar).
Combustion Gas Connection
See section "Fidas24: Connecting the Combustion Gas Line (see page
73)"
Test Gas Connection
The test gas outlet is connected to the sample gas connection ex works.
If the test gases are to be introduced directly into the gas sampling point,
the connection between the test gas outlet and the test gas inlet on the
sample gas connection must be removed, and the respective opening in
the sample gas connection must be sealed with an M6 screw, so that it is
gas-tight.
