Endress+Hauser Proline Prowirl 72, Руководство по эксплуатации

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11 Description of device functions Proline Prowirl 72
76 E Hauser
UNIT LENGTH Use this function to select the unit displayed for the length of the nominal diameter in the
NOMINAL DIAMETER function (see Page 100).
Options:
MILLIMETER
INCH
Factory setting:
Depends on country (metric system units,
→
Page 105, or US units,
→
Page 107 )
TEXT ARBITRARY
VOLUME UNIT
!
Note!
This function is not available unless the VOLUME FLOW option was selected in the
MEASURING UNIT TYPE function (see Page 73).
Use this function to enter a text for a selectable volume flow unit. You define only the
text, the associated unit of time is selected in the UNIT FLOW function (see Page 74).
User input:
xxxx (max. 4 characters)
Valid characters are A-Z, 0-9, +, -, decimal point, white space or underscore
Factory setting:
“– – – –” (no text)
Example: see FACTOR ARBITRARY VOLUME UNIT function.
!
Note!
The volume unit defined in this function is offered as a possible option ( arbitrary volume
unit ) in the UNIT FLOW function (see Page 74).
FACTOR ARBITRARY
VOLUME UNIT
!
Note!
This function is not available unless a text was entered in the TEXT ARBITRARY
VOLUME UNIT function.
Use this function to define a quantity factor (without time) for the selectable volume flow
unit. The volume unit on which this factor is based is one liter.
User input:
5-digit floating-point number
Factory setting:
1
Unit:
Text arbitrary volume unit / liter
Example:
You want to measure saturated steam at 180°C constant and display the heat flow.
Take the following values from a table document (e.g. IAPWS-IF97):
a) density: 5.158 kg/m³
b) enthalpy: 2777.22 kJ/kg
Thus 1 m³ steam has an enthalpy of 2777 kJ/kg · 5.158 kg/m3 = 14323 kJ/m³,
1 liter corresponds to 14.323 kJ.
In the TEXT ARBITRARY VOLUME UNIT function, you could enter “KJ”, for example,
as the name for the volume unit (appears as an option in the UNIT FLOW function). The
value 14.323 would have to be specified in the FACTOR ARBITRARY VOLUME UNIT
function.
Function description SYSTEM UNITS