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Emerson Process Management GmbH & Co. OHG4-8
X-STREAM XEFD
Instruction Manual
HASXEDE-IM-EX
03/2012
4.3 Vapor Recovery Application - Special Information
4.3 Vapor Recovery Application - Special Information
EXPLOSION HAZARD BY HOT COMPONENTS
Consider the waiting time statement on the front door label before opening!
Do not open the instrument when energized.
Ensure that external circuitry is disconnected or de-energized before
opening the instrument.
XEFD analyzers, intended for vapor recovery
applications (measuring CH
4
and non-CH
4
),
contain additional components and have a
special conguration:
• Below the two IR channels a converter
assembly is installed, thermostated to
about 270 °C.
• Inside the front door a second power sup-
ply unit and another electronics board is
installed to supply the converter.
An overtemperature switch limits the tempe-
rature of the converter in case of failure of the
temperature control board.
Inside the converter assembly there is a small
stainless steel vessel, filled with catalytic
converter material, which is a consumable
and needs to be replaced depending on the
required converter efciency:
2
1
5
3
4
1: IR measurement
2: High temperature converter assembly
3: Additional temperature control
4: Additional power supply unit
5: Overtemperature switch
Fig. 4-3: Vapor recovery application setup
The waiting time is calculated
to ensure, temperatures of
hot
components are below the ana-
lyzer temperature class for hazar-
dous areas!
Accessible components still may
be hot and harmful to humans!