Emerson Process Management GmbH & Co. OHG
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1
Techn. Description
X-STREAM XEFD
Instruction Manual
HASXEDE-IM-EX
07/2017
1.9 Vapor Recovery Application
Converter efficiency
The measurement accuracy is highly depen-
dent on the converter efficiency: If this is too
low, the converter material needs replace-
ment.
To measure the converter efficiency, one
has to compare the measurement values of
CH1 with and without having the gas flowing
through the converter. This requires activating
the valve V1.
For the ease of use, special PLC and calcula-
tor programs are provided with analyzers for
vapor recovery applications, automatically
calculating the efficiency each time after a
calibration has been performed. The calcu
-
lated value shows up as a measurement
result on the measurement display.
To calculate the efficiency without a preced
-
ing calibration, you can also start the PLC
program manually from the webbrowser
interface.
Chapter 4 “Service and Maintenance”
for instructions about when and how to re
-
place the converter material. The appendix
contains listings of the PLC and calculator
programs, enabling automatic converter ef
-
ficiency calculation.
