EL3060 CONTINUOUS GAS ANALYZERS | OI/EL3060-EN REV. A 37
Connecting the pressure sensor
• The pressure sensor (see page 26) measures the air pressure inside the
housing as standard. As an option, the pressure sensor is connected to a
gas port (flame barrier) via an FPM tube.
• If the pressure sensor is connected to a gas port, the yellow plastic
screw cap must be screwed out of the connection fittings of the pres-
sure sensor before the gas analyzer is commissioned.
• If the pressure sensor connection is not connected to the sample gas
outlet, the pressure sensor and the sample gas outlet must be on the
same pressure level for an exact pressure correction.
• Pressure sensor working range: p
abs
= 600 to 1250 hPa
CAUTION
The pressure sensor connection must not be connected to the sample gas
feed path for the measurement of flammable and corrosive gases.
Installing the flow meter
Install a flow meter or flow monitor with a needle valve before the sample
gas inlet and if required before the purge gas inlet in order to be able to
adjust and monitor the gas flow rate.
Installing the flow limiting device
• The flow of sample gas entering the gas analyzer must be limited by
means of an external flow limiting device.
• The flow limiting device must comply with the requirements of
EN 60079-1:2014, Annex G, Section 3.3.
• The maximum permissible flow rate data of the individual analyzers and
device variants must be observed.
Provide for gas line system purging
Install a shut-off valve in the sample gas line (definitely recommended with
pressurized sample gas), in order to provide a means for purging the gas
line system by feeding in nitrogen from the gas sampling point.
Discharge exhaust gases
Conduct exhaust gases directly into the atmosphere or through a line with a
large internal diameter which is as short as possible, or into a gas discharge
line. Do not conduct exhaust gases via restrictions or shut-off valves!
Important notes
• Dispose of corrosive and toxic exhaust gases according to the regula-
tions!
• Comply with the gas inlet and outlet conditions (see page 21)!
• Purge the sample gas feed path before commissioning (see page 46).
• Do not feed in the sample gas until the gas analyzer has reached room
temperature and the warm-up phase has ended! Otherwise, the sample
gas could condense in the cold analyzer.
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