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Reference Manual
00809-0200-4801, Rev BA
April 2007
Rosemount 3051S
3-12
Solution to Situation #2
Table 3-3 lists the appropriate configuration settings.
Table 3-3. Analog Input function
block configuration for a
pressure transmitter used in
level measurement
(situation #1).
Output calculation for Situation #2
When the L_Type is configured as Indirect, the OUT parameter
is calculated as:
In this example, when PV is 5 psi, then the OUT parameter will be
calculated as follows:
Situation #3
The transmitter in situation #3 is installed below the tank in a position where
the liquid column in the impulse line, with an empty tank, is equivalent to 2.0
psi (see Figure 3-2).
Figure 3-2. Situation #3
Diagram.
Parameter Configured Values
L_TYPE Indirect
XD_SCALE 0 to 7 psi
OUT_SCALE 0 to 16 ft
Channel 1 - pressure
OUT = PV – XD_SCALE_0% * (OUT_SCALE_100% – OUT_SCALE_0%) + OUT_SCALE_0%
XD_SCALE_100% – XD_SCALE_0%
OUT = 5 psi – 0 psi * (16 ft. – 0 ft.) + 0 ft. = 11.43 ft.
7 psi – 0 psi
16 ft
0 ft
2.0 psi measured at
the transmitter
Empty Tank