
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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