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Emerson Process Management GmbH & Co. OHG
4-10
X-STREAM XEFD
Instruction Manual
HASXEDE-IM-EX
07/2017
4.3 Vapor Recovery Application – Special Information
• Ensure
“Pump 1”
within the control menu
is set to
ON
.
Note!
“Pump 1”
is used to disable (
Off
) or
enable (
On
) the gas flow through
the converter!
•
Apply the calibration gas for CH2 (e. g.
C
6
H
14
). As CH1 and CH2 inside the ana-
lyzer are piped in parallel, this gas now
goes through the converter.
•
When stabilized, write down the measure
-
ment reading of CH1 (CH
4
channel
with
converter
)
• Now change
“Pump1”
to
Off
, to let the gas
bypass the converter.
•
When stabilized, write down the mea
-
surement reading of CH1 (CH
4
channel
without converter
)
•
Calculate the converter efficiency:
•
If the result is below 0.9 (90 %), the con
-
verter material should be replaced as
described in the next section.
Part number for converter replacement mate
-
rial: ETC02579
Notes!
While “
Pump 1
” is set to
Off
, the NAMUR
status
Function Check
is actvated.
Don’t forget to set
“Pump 1”
to
On
again, af-
ter finishing the calculation of converter ef
-
ficieny!
Note!
The analyzer is configured to measure CH
4
at channel 1 (CH1), with the converter in-
stalled in front of its measurement cell.
The total content of hydrocarbons (C
n
H
m
)
within the sample gas is measured at chan-
nel 2 (CH2).
Zero C
alibration..
Span C
alibration..
Advanced C
alibration..
Apply Gas..
Lock M
enus!
Acknowledgements
Pump 1:
On
Pump 2:
Off
Ranges..
4.3.1
Determining the converter efficiency