Micro Motion RFT9709 Manual de Instruções Página 110

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96
Using ProLink
®
Software with Micro Motion
®
Transmitters
Configure Menu: Transmitter Variables
continued
Flow units
Special flow units
Special flow units require a base unit of mass or volume, a conversion
factor, and a time base. The conversion factor determines the value of
the special unit in terms of the base mass or volume unit. Find the
conversion factor by performing the following calculation:
Since the flow rate is mass or volume per unit time, the special unit must
have a time base.
The RFT9739 can use one special unit of mass and one special unit
of volume to calculate mass and volume flow rates and totals.
The RFT9712 and RFT9729 can use one special unit of mass or
volume to calculate a flow rate and a total.
The IFT9701 and IFT9703 do not support special measurement
units.
To establish a special unit of mass or volume for a process fluid
other than gas:
1. In the Configure Transmitter Variables dialog box, select SPECIAL as
the mass flow or volume flow unit, then click OK.
Table 9-7. Volume total and volume inventory measurement units for process variables
Units RFT9739 IFT9701 IFT9703 RFT9712 RFT9729
gallons X X X X X
liters XXXXX
imperial gallons XXXXX
cubic feet X X X
cubic meters XXXXX
oil barrels X X X
SPECIAL X X X
X Indicates units are available
Table 9-8. Differential pressure measurement units for process variables
Units RFT9739 IFT9701 IFT9703 RFT9712 RFT9729
inches of water at 68
°
FX
inches of mercury at 0
°
CX
feet of water at 68
°
FX
millimeters of water at 68
°
FX
millimeters of mercury at 0
°
CX
pounds/square inch X
bar X
millibar X
grams/square centimeter X
kilograms/square centimeter X
pascals X
kilopascals X
torr at 0
°
CX
atmospheres X
X Indicates units are available
Special flow unit Conversion factor Base flow unit
()
Time
÷=
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