Proline t-mass 65 PROFIBUS DP/PA Commissioning
Endress+Hauser 55
6.3.5 "Heat Flow" Quick Setup menu
The device can calculate and output the heat of combustion of common fuel gases such as methane,
natural gas, propane, butane, ethane and hydrogen.
Use this Quick Setup menu to program the method used to calculate the heating value or calorific
value (CV). The device can be configured to give two independent heating value outputs and
totalized values. For example, the pipeline has either natural gas or propane running at separate
times and the heating value is required for both gases.
A0009909-en
Calculation mode 1 and 2
• The heating value for CALCULATION MODE 1 corresponds to the settings in the function
GAS GROUP 1.
• The heating value for CALCULATION MODE 2 corresponds to the settings in the function
GAS GROUP 2.
!
Note!
• If only one gas group is used, then leave mode 2 as default settings.
• The units of measure are selected in the system units section ä 49.
Auto Gross
The gross heating value (or higher heating value) is the total heat obtained by complete combustion
at constant pressure of a volume of gas in air, including the heat released by the water vapor in the
combustion products (gas, air and combustion products taken at reference cumbustion temperature
and standard pressure).
Auto Net
The net heating value (or lower heating value) is determined by subtracting the heat of vaporization
of the water vapor from the higher heating value. This treats any water formed as water vapor. The
energy required to vaporize the water therefore is not realized as heat.
+
+
E
Esc
E
+
-
XXX.XXX.XX
HOME-POSITION
+
E
QUICK SETUP
QS
HEATFLOW
AUTONET
Selection CALCULATION MODE 1
MANUAL
AUTO GROSS
Selection CALCULATION MODE 2
AUTONET
MANUAL
AUTO GROSS
CALORIFIC
VALUE 2
CALORIFIC
VALUE 1
CALORIFIC
VALUE TYPE
REF. COMBUST.
TEMPERATURE
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