Emerson manual Rosemount 3051S, Reference Manual, 0 to 16 ft

Rosemount 3051S

Reference Manual

00809-0200-4801, Rev BA April 2007

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).

Parameter	Configured Values
L_TYPE	Indirect
XD_SCALE	0 to 7 psi
OUT_SCALE	0 to 16 ft
Channel	1 - pressure

Output calculation for Situation #2

When the L_Type is configured as Indirect, the OUT parameter is calculated as:

OUT = PV – XD_SCALE_0% * (OUT_SCALE_100% – OUT_SCALE_0%) + OUT_SCALE_0%

XD_SCALE_100% – XD_SCALE_0%

In this example, when PV is 5 psi, then the OUT parameter will be calculated as follows:

OUT = 5 psi – 0 psi * (16 ft. – 0 ft.) + 0 ft. = 11.43 ft.

7 psi – 0 psi

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.

16 ft

Empty Tank

0 ft

2.0 psi measured at the transmitter

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