Installing the Gas Analyzer
73
Fidas24: Connecting the Combustion Gas Line
Connecting the Combustion Gas Line
Cleaning the Combustion Gas Line
1
Pump cleaning agent (alkaline cleaner, stainless steel pickling agent)
through the stainless steel tube.
2
Thoroughly rinse the tube with distilled water.
3
Purge the tube for several hours at a temperature of > 100 °C with
synthetic air or with nitrogen (10 to 20 l/h).
4
Seal the ends of the tube.
Connecting the Combustion Gas Line
5
Connect a two-stage cylinder pressure reducer (version for high purity
gases) to the combustion gas cylinder.
6
Connect the combustion gas line to the cylinder pressure reducer.
7
Install a flow restrictor in the combustion gas supply line which
restricts the combustion gas flow to 10 l/h of H
2
or 25 l/h of H
2
/He
mixture. This means that operation of the gas analyzer is safe even
with a defect in the combustion gas feed path (e.g. leaks).
8
Install a shut-off valve in the combustion gas supply line. It is
recommended that a pneumatic valve is installed; this valve must be
controlled by the instrument air supply in such a way that the
combustion gas feed is automatically shut off if the instrument air
supply fails (see page 129) (and the continuous housing purge
therefore fails).
9
Connect (see page 66) the combustion gas line to the combustion
gas inlet of the analyzer module via a pressure regulator
(0 to 1.6 bar).
Check the seal integrity of the combustion gas line
10
Check (see page 116) the seal integrity of the combustion gas line
after connection.
