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Operation
Vm – Volume at measurement conditions
6.4.2.2
The volume measured by the connected gas meter will be totalled in this
counter.
If there is a fault (see chapter 8 "Faults"), the Vm counter will be stopped
and the volume will be totalled in a special disturbance quantity counter. To
control the measurements, the Vm can be kept at the same level as the
gas meter when putting the device into operation ( chapter 5.3.1
"Configuration of measurement parameters").
p – Gas pressure
6.4.2.3
The measured gas pressure is used to calculate the volume at base
conditions. The pressure is displayed as absolute pressure.
If the pressure cannot be measured due to a fault, an adjustable
replacement value is displayed and is used to calculate the disturbance
quantity. The replacement value is determined when putting the device into
operation ( chapter 5.3.1 "Configuration of measurement parameters").
T – Gas temperature
6.4.2.4
The measured gas temperature is used to calculate the volume at base
conditions.
If the temperature cannot be measured due to a fault, an adjustable
replacement value is displayed and is used to calculate the disturbance
quantity. The replacement value is determined when putting the device into
operation ( chapter 5.3.1 "Configuration of measurement parameters").
K – Compressibility ratio factor
6.4.2.5
The calculated compressibility ratio factor is used to calculate the volume at
base conditions.
The EK280 supports several equations to calculate the compressibility ratio
factor. The corresponding equation is determined by the applicable
guidelines and standards for the area of application of the device. This can
be adjusted at the ordering or commissioning phase ( chapter 5.3.1
"Configuration of measurement parameters").
C – Conversion factor
6.4.2.6
The currently valid factor for converting the volume at measurement
conditions to base conditions.
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