42
Reference Manual
00809-0200-4840, Rev BA
December 2014
Section 4: Configuration
4.3.11
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.
Note
The displayed (reported) measurement units for the output PV are set using the
Primary Variable Units
parameter (
). Changing these units does not
automatically re-scale the output PV value.
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.
The profile options are described in the following sections:
“Contents (volume) measurement” on page 43
Field Communicator or AMS
To change the tank shape / non linear profile:
1.
From the
Home
screen, select
2: Configure
.
2.
Select
2: Manual Setup
.
3.
Select
3: Profiling
.
4.
Select
2: Set Non-Linear Profile
.
5.
Select a new profile, and then press “
Enter
” to save the selection.
6.
Press “
SEND
” to update the transmitter.
Note
When messages appear, take appropriate action if needed and press “
OK
”.
The selected profile can be viewed at Fast Key sequence 2, 2, 3, 3.
Rosemount 3490 Series Control Unit
To view or change the tank shape:
1.
From the
Main Menu
screen, select
SETUP
.
2.
Select the transmitter (e.g. “
Tx1: 3107
”).
3.
Select
DUTY
.
4.
Select
Tank Shape
.
Fast Keys
2, 2, 3, 2
Select Non-Linear Profile: (Linear)
Linear
Special Plotted
Horizontal Cylinder Flat
Spherical
Horizontal Cylinder Domed
Flume/weir (3/2)
V notch (5/2)
Linear
ENTER
ABORT
(Field Communicator Screen)
Tank Shape P011
Linear
Esc=Quit =Edit
(Rosemount 3491 Screen)
Содержание 3107
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