Endress+Hauser Proline Prowirl 73 - Page 152

Description of device functions Proline Prowirl 73
152 Endress+Hauser
REFERENCE DENSITY Prerequisite
The function is not available if the following was selected in the SELECT FLUID function
(ä 143):
• GAS VOLUME
• LIQUID VOLUME
• SATURATED STEAM DELTA HEAT
• SATURATED STEAM
• SUPERHEATED STEAM
Description
The reference density can be displayed or entered in this function for fluids other than
those listed above:
• The appropriate unit is taken from the UNIT DENSITY function (ä 104).
• We recommend you reset the totalizer if the value in this function is changed.
User input
If REAL GAS, USER DEFINED LIQUID was selected: enter the reference density of a gas
or liquid. This is needed to calculate the corrected volume flow.
Display
• If COMPRESSED AIR, WATER, WATER DELTA HEAT, ARGON, CARBON
DIOXIDE, METHANE, NITROGEN, OXYGEN, NATURAL GAS, GAS MIXTURE was
selected:
The display shows the reference density calculated by Prowirl 73 based on the values
entered in the REFERENCE TEMPERATURE (ä 151) and REFERENCE
PRESSURE (ä 151) functions.
• Otherwise "1" appears on the display.
ENERGY
CALCULATION
Prerequisite
The function is only available if USER DEFINED LIQUID was selected in the SELECT
FLUID function (ä 143).
Description
For selecting the method for calculating the energy.
Options
•DELTA HEAT
•COMBUSTION
• NONE
Factory setting
NONE
SPECIFIC HEAT
CAPACITY
Prerequisite
The function is only available if USER DEFINED LIQUID was selected in the 
SELECT FLUID function (ä 143) and DELTA HEAT was selected in the 
ENERGY CALCULATION function.
Description
For defining the specific heat capacity of the user-defined liquid.
User input
5-digit floating-point number
Factory setting
The corresponding unit is taken from the UNIT SPECIFIC HEAT CAPACITY function
(ä 105).
Function description, FLOW COMPUTER group