Micro Motion RFT9709 Manual de instrucciones Pagina 112

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98
Using ProLink
®
Software with Micro Motion
®
Transmitters
Configure Menu: Transmitter Variables
continued
Flow units
d. Select an appropriate time unit for conversion.
For example,
fortnights
easily convert to
minutes
.
e. Determine how many special time units are in the selected
standard time unit.
For example, there are
336
hours in 1
fortnight.
f. Divide the value from step 3c by the value in step 3e to determine
the units conversion.
For example,
8/336
.
g. Take the inverse of the value from step 3f to determine the
conversion factor.
For example, the inverse of
8/336
is
336/8
or
42
.
4. Select standard mass or standard volume unit.
5. Enter the conversion data into the ProLink Configure Special Units
dialog box as follows:
a. Enter the value from step 3g into the ProLink Conv Fact text box.
For example, enter
42
.
b. From the Flow Unit drop-down list, choose the standard mass or
volume flow unit of measure that was selected in step 3b.
For example, choose
gallons
.
c. From the Time Unit drop-down list, choose the standard time unit
that was selected in step 3d.
For example, choose
hour
.
d. If desired, enter an abbreviation (one to four characters in length)
for the special unit of measure in the Flow Text text box. If the
transmitter has a display, this text appears in the flow rate screen.
For example, enter
PPH
for
pints per hour
e. If desired, enter text for the flow total unit of measure in the
Tot Text text box. If the transmitter has a display, this text appears
in the flow total screen.
For example, enter
PINT
6. Choose OK.
Special units of mass for
gases
The meter measures mass flow of gas or standard volumetric flow of a
gas. Mass flow rate and volumetric flow rate are related by the density of
the gas at a reference condition. To establish a special unit of mass for a
gas, determine the density of the gas at a reference temperature,
pressure, and composition. The meter should not be used to measure
actual volumetric flow of a gas.
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