Reference Manual
00809-0100-4664, Rev BA
January 2010
Rosemount 8712
3-10
Base Volume Unit
Base volume unit is the unit from which the conversion is being made. Set this
variable to the appropriate option.
Conversion Number
The special units conversion number is used to convert base units to special
units. For a straight conversion of volume units from one to another, the
conversion number is the number of base units in the new unit. For example,
if you are converting from liters to cm3 and there are 0.001 liters in a cm3, the
conversion factor is 0.001.
Base Time Unit
Base time unit provides the time unit from which to calculate the special units.
For example, if your special units is a volume per minute, select minutes.
Special Flow Rate Unit
Special flow rate unit is a format variable that provides a record of the units to
which you are converting. The Handheld Communicator will display a special
units designator as the units format for your primary variable. The actual
special units setting you define will not appear. Four characters are available
to store the new units designation. The 8712 LOI will display the four
character designation as configured.
Example
To display flow in cubic cm per minute, and one cm3 is equal to 0.001 liters,
the procedure would be:
Set the Volume Unit to cm3 or cc.
Set the Base Volume Unit to liters.
Set the Input Conversion Number to 0.001.
Set the Time Base to Min.
Set the Rate Unit to CC/M.
Line Size The line size (sensor size) must be set to match the actual sensor connected
to the transmitter. The size must be specified in inches according to the
available sizes listed below. If a value is entered from a control system or
Handheld Communicator that does not match one of these figures, the value
will go to the next highest option.
The line size (inches) options are as follows:
Fast Keys 1, 3, 2, 2, 2
Fast Keys 1, 3, 2, 2, 3
Fast Keys 1, 3, 2, 2, 4
Fast Keys 1, 3, 2, 2, 5
Fast Keys 1, 3, 3
LOI Key TUBE SIZE
0.1, 0.15, 0.25, 0.30, 0.50, 0.75, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 10, 12, 14,
16, 18, 20, 24, 28, 30, 32, 36, 40, 42, 44, 48, 54, 56, 60, 64, 72, 80
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