Flexim FLUXUS F502BT, Operating Instruction

Page: 142 / 162

19 Thermal energy rate measurement
19.4 Steam in inlet
FLUXUS F502TE
2020-05-29, UMFLUXUS_F502TEV1-5EN
142
19.3.1 Automatic display toggling in the lower line
Activation
• Press during the measurement until BTU-DISPL. ON is displayed.
• Press ENTER.
The following physical quantities will be displayed alternately at an interval of 3 s:
– physical quantity selected in the program branch Output Options
– fluid temperature in the supply line
– fluid temperature in the return line
– difference between the fluid temperatures in the supply line and the return line
Deactivation
• Press during the measurement until BTU-DISPL. OFF is displayed.
• Press ENTER.
19.4 Steam in inlet
If the supply pressure is constant or can be measured with an additional input, the thermal energy rate can be determined
for a fluid that is vaporous in the supply line.
The state of aggregation of the fluid is determined by means of the supply pressure and the supply temperature.
The steam coefficients of water and ammonia are stored in the internal database of the transmitter. The steam coefficients
of other fluids have to be entered with the FluxSubstanceLoader program.
19.4.1 Activation/deactivation
• Select the menu item Special Funct.\SYSTEM settings\Dialogs/Menus\Steam in inlet .
• Press ENTER.
• Select
on to activate Steam in inlet . The state of aggregation of the fluid is determined by means of the supply
pressure and the supply temperature.
• Select off to deactivate Steam in inlet . The fluid is always considered to be liquid in the supply line.
• Press ENTER.
If Steam in inlet is activated, the supply pressure has to be entered in the program branch Parameter .
• Enter the supply pressure.
• Press ENTER.
Notice!
The measurement of the volumetric flow rate and the thermal energy rate is only possible when the fluid is liquid in
the return line.
Special Funct.\SYSTEM settings\Dialogs/Menus\Steam in inlet
Special Funct.\...\Steam in inlet\Inlet pressure
Notice!
The menu item Steam in inlet will always be displayed, independently of the selected physical quantity.
However, the supply pressure will only be used for the thermal energy rate measurement.