Emerson Rosemount 3051S ERS Reference Manual page 42

Configuration
November 2016
Direct method
The steps required to configure scaled variable for a mass or volume application using the direct method
are highlighted below:
1. Enter in a text string (up to five characters: A–Z, -, %, /, *, and "space") to define the unit of measure
for the scaled output. Examples include GALNS, POUND, or LITER.
2. Define the number of scaled variable points that will be configured (valid range = 2 – 20).
3. Enter the first DP value (in engineering units) and the corresponding scaled variable value.
4. Repeat
Note
The values entered for each successive DP and scaled variable pair must be greater than or equal to the
previous pair.
5. The ERS System will not be able to calculate mass or volume if the process is below the P
tap. If the scaled variable configuration needs to be adjusted to account for the mounting location of
P
HI
No offset: the scaled variable configuration defined in

mounting location of the P
Offset A: Adjust the scaled variable configuration by providing the height of the P

(relative to the bottom of the vessel) and the specific gravity of the process.
Offset B: Adjust the scaled variable configuration by defining how much mass or volume is located

below the P
reading "0 DP").
6. If an offset was used in
accounts for the mounting location of the P
Figure 3-4. Scaled Variable - Direct Method
34
Step 3 for the number of scaled variable points defined in
sensor, you can enter in an offset:
transmitter.
HI
pressure tap (this will define how much scaled output is present when the ERS System is
HI
Step 5, a new scaled variable configuration will automatically be created which
Step
Step 3 and Step 4
transmitter.
HI
50 inH O = 300 GALNS
2
20 inH O = 50 GALNS
2
15 inH O= 30 GALNS
2
0 inH O = 15 GALNS
2
Reference Manual
00809-0100-4804, Rev CB
2.
pressure
HI
already accounts for the
pressure tap
HI
Configuration