Set Transfer Function - Emerson Rosemount 2051 Wireless Series Reference Manual

Reference Manual
00809-0100-4100, Rev AA
2.8.2

Set Transfer Function

The 3051 Wireless has two output settings: Linear and Square Root. Activate the square root
output option to make output proportional to flow. As input approaches zero, the 3051
Wireless automatically switches to linear output in order to ensure a more smooth, stable
output near zero (see
From 0 to 0.6 percent of the ranged pressure input, the slope of the curve is unity (y = x). This
allows accurate calibration near zero. Greater slopes would cause large changes in output (for
small changes at input). From 0.6 percent to 0.8 percent, curve slope equals 42 (y = 42x) to
achieve continuous transition from linear to square root at the transition point.
To select the output transfer function:
1.
2.
3.
4.
Figure 2-2. Square Root Output Transition Point
Configuration
Fast Keys
2, 2, 2, 2
Figure 2-2).
From the Home screen, select 2: Configure.
Select 2: Manual Setup.
Select 2: Pressure.
Select 2: Transfer Function and choose either Linear or Square Root.
Full Scale
Flow (%)
Sq. Root Curve
Transition Point
Slope=42
Slope=1
Section 2: Configuration
June 2012
Sq. Root
Curve
Transition Point
Linear Section
19