Square Root Of Dp Configuration - Emerson Rosemount 2051 Reference Manual

Configuration
November 2016
Flow configuration using Class 2 Master
1. From the Basic Setup >> Units >> Primary Value >> Primary Value Type dropdown, select
Flow.
2. Select units.
Note
Flow units in steps
a. From the Basic Setup >> Units >> Primary Value >> Scale In (Transducer Block) >> Unit
b. From the Basic Setup >> Units >> Primary Value >> Unit (PV) dropdown, select
c. From the Basic Setup >> Units >> Output Signal (Analog Input Block) >> Unit (Out Scale)
3. Enter scaling.
Note
Scaling is done in the Transducer Block.
a. In the Basic Setup >> Units >> Primary Value >> Scale In (Transducer Block) field,
b. In the Basic Setup >> Units >> Primary Value >> Scale Out (Transducer Block) field,
4. Verify Analog Input (AI) Block.
Note
Scaling should always be done in the Transducer Block. Ensure the AI Block is always set to
no linearization for flow applications. To ensure no additional scaling is being done on the AI
Block, set the lower values in steps
a. In the Basic Setup >> Units >> Process Value Scale (Analog Input Block) field, enter upper
b. In the Basic Setup >> Units >> Output Signal (Analog Input Block) field, enter upper and
c. From the Basic Setup >> Units >> Output Signal (Analog Input Block) >> Linearization
2.6.2

Square Root of DP Configuration

The Rosemount 2051 has two Pressure output settings: Linear and Square Root. Activate
the square root output option to make output proportional to flow.
To configure the transmitter to output square root of differential pressure, a Class 2 Master
must be used.
Square Root configuration using Class 2 Master
10
2b and 2c must match.
(Secondary Value 1) dropdown, select engineering unit.
engineering unit.
dropdown, select engineering unit.
enter upper and lower values (this value should correspond to the unit selected in
step 2a).
enter upper and lower values (this value should correspond to the unit selected in
step 2b).
and lower values (this value should correspond to the unit selected in step 2b).
lower values (this value should correspond to the unit selected in Step 2c).
Type dropdown, select No Linearization.
4a and 4b to 0 and the upper values to 100.
Reference Manual
00809-0300-4101, Rev BB
Configuration