Technical data Proline Prowirl F 200 PROFIBUS PA
186 Endress+Hauser
Corrected volume flow calculation
(Volume flow × operating density)/reference density
• Operating density for water and other liquids: depends on the temperature
• Operating density for all other gases: depends on the temperature and process pressure
Energy flow
Medium Fluid Standards Explanation Heat/energy option
Steam
1)
–
IAPWS-
IF97/ASME
If the process pressure is
fixed, or if the pressure
is read in via PROFIBUS
PA
Heat
Gross calorific value
2)
in relation to mass
Net calorific value
3)
in relation to mass
Gross calorific value
2)
in relation to corrected
volume
Net calorific value
3)
in relation to corrected
volume
Gas
Single gas
ISO 6976
Contains GPA 2172
If the process pressure is
fixed, or if the pressure
is read in via PROFIBUS
PA
Gas
mixture
ISO 6976 Contains GPA 2172
If the process pressure is
fixed, or if the pressure
is read in via PROFIBUS
PA
Air NEL40 If the process pressure is
fixed, or if the pressure
is read in via PROFIBUS
PA
Natural
gas
ISO 6976 Contains GPA 2172
If the process pressure is
fixed, or if the pressure
is read in via PROFIBUS
PA
AGA 5
Liquids
Water IAPWS-
IF97/ASME
Liquefied
gas
ISO 6976 Contains GPA 2172
Other
liquid
Linear
equation
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
2) Gross calorific value: combustion energy + condensation energy of the flue gas (gross calorific value > net
calorific value)
3) Net calorific value: only combustion energy
Mass flow and energy flow calculation
NOTICE
The process pressure (p) in the process pipe is required to calculate the process
variables and the limit values of the measuring range.
‣
In the case of the PROFIBUS PA device, the process pressure can be transmitted from
the Profibus master to the measuring device via the AO Block or entered as a fixed
value in the External compensation submenu (→ 101).
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