Endress+Hauser Proline Prowirl F 200 - Calculation Methods and Performance Characteristics

Proline Prowirl F 200 PROFIBUS PA Technical data
Endress+Hauser 185
– Heat flow difference
– Specific volume
– Degrees of superheat
Order code for "Sensor version", option "Mass flow (integrated temperature measurement)"
combined with order code "Application package", EU "Wet steam measurement":
• Steam quality
• Total mass flow
• Condensate mass flow
Calculation of the measured variables
The meter electronics system of the Prowirl 200 unit with the order code "Sensor version",
option 3 "Mass flow (integrated temperature measurement)" has a flow computer. This
computer can calculate the following secondary measured variables directly from the
primary measured variables recorded using the pressure value (entered or external) and/or
temperature value (measured or entered).
Mass flow and corrected volume flow
Medium Fluid Standards Explanation
Steam
1)
–
IAPWS-IF97/
ASME
If integrated temperature measurement is provided and the
process pressure is fixed, or if the pressure is read in via
PROFIBUS PA
Gas
Single gas NEL40 If the process pressure is fixed, or if the pressure is read in via
PROFIBUS PA
Gas mixture NEL40
Air NEL40
Natural gas ISO 12213-2 Contains AGA8-DC92
If the process pressure is fixed, or if the pressure is read in via
PROFIBUS PA
AGA NX-19 If the process pressure is fixed, or if the pressure is read in via
PROFIBUS PA
ISO 12213-3 Contains SGERG-88, AGA8 Gross Method 1
If the process pressure is fixed, or if the pressure is read in via
PROFIBUS PA
Other gases Linear equation Ideal gases
If the process pressure is fixed, or if the pressure is read in via
PROFIBUS PA
Liquids
Water IAPWS-IF97/
ASME
Liquefied gas Tables Propane and butane mixture
Other liquid Linear equation Ideal liquids
1) The Prowirl 200 is able to calculate the volume flow, and other measured variables derived from the
volume flow, across all steam types with full compensation using the pressure and temperature. For
information on setting the device behavior, see the "Perform external compensation" section →  101
Mass flow calculation
Volume flow × operating density
• Operating density for saturated steam, water and other liquids: depends on the
temperature
• Operating density for superheated steam and all other gases: depends on the
temperature and process pressure