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December 2014
14
Quick Start Guide
Transmitter primary variable units (P012)
This selects alternative display units for the HART Primary Variable (PV), which are
then reported to a HART Master Device such as a Rosemount 3490 Series Control Unit.
Note
Selecting alternative display units does not automatically re-scale the PV value.
Use the parameter
Transmitter Scale Factor (page 16) to manually re-scale the
value (or base units) into appropriate units.
Field Communicator or AMS
To view or change the PV Units:
1. From the Home screen, select
2: Configure.
2. Select
2: Manual Setup.
3. Select
3: Profiling.
4. Select
1: Primary Variable Units P012.
5. Select new units, and then press “
Enter” to
save the selection.
6. Press “
SEND” to update the transmitter.
Note
If the HART PV has no units, select and confirm the “None”, “Unknown”, or
“Not Used” option as appropriate for the HART Master Device (host).
Rosemount 3490 Series Control Unit
To view or change the PV Units:
1. From the Main Menu screen, select
SETUP.
2. Select the transmitter (e.g. “
Tx1: 3107”).
3. Select
UNITS, and then select PV Units.
4. Follow the on-screen instructions to select
and confirm the new setting. If the HART PV
has no units, select and confirm the “
None”
option.
Transmitter tank shape / non-linear profile (P011)
This selects the shape of a tank or an open channel, and establishes the linear or
non-linear relationship between the live liquid level (height) and the process value
(PV) derived from that level. The transmitter is pre-programmed with popular profiles
that are mathematical formulas to convert a linear level reading to a flow or
volumetric process value (PV). The Current Output is then driven by the flow or
volumetric PV.
Note
Select “Linear” if the process value (PV) is a level measurement.
Primary Variable Units P012
ft
Cum
Cum/h
Cum/s
ft
gal/min
Impgal
Impgal/d
ft
ENTER
ESC
(Field Communicator screen)
PV Units P012
ft
Esc=Quit =Edit
(Rosemount 3491 screen)