Rosemount 3051S Electronic Remote Sensors - Emerson Process ...

Reference Manual
00809-0100-4804, Rev AA
January 2011
Figure 3-5. Supported Tank
Shapes for “Tank Formula”
Configuration Method
T
T
R
R
L
Horizontal Cylinder
L
Rosemount 3051S ERS System
Tank Formula Method
The tank formula method for configuring Scaled Variable can be used if the
ERS system is installed on one of the types of tanks shown in Figure 3-5. The
steps for using the Tank Formula method are described below:
1. Enter in a text string (up to 5 characters: A-Z, -, %, /, *, and “space”) to
define the unit of measure for the scaled output. Examples include
GALNS, POUND, or LITER.
2. Select the type of tank for the ERS application (refer to Figure 3-5).
3. Define the following information about the tank:
a. Units of measure used for tank dimensions
b. Tank length (L) (not applicable for spherical tanks)
c. Tank radius (R)
d. Location of PHI pressure tap (T)
e. Maximum capacity of vessel (in terms of unit of measure defined in
Step 1)
f. Specific gravity of process fluid
4. A Scaled Variable configuration will automatically be generated based on
the information from Step 3. Verify and modify the Scaled Variable
configuration if necessary.
5. To have the 4-20 mA signal of the ERS system output the Scaled
Variable measurement, map Scaled Variable to the HART Primary
Variable and configure the Upper and Lower Range Values.
T
L
R
Horizontal Bullet Vertical Bullet Vertical Cylinder Sphere
L
R
T
T
R
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