Emerson Rosemount 2051 Wireless Series, Reference Manual, Page: 142 / 250

19
Reference Manual
00809-0100-4100, Rev AA
Section 2: Configuration
June 2012
Configuration
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
Figure 2-2 ).
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. From the Home screen, select 2: Configure.
2. Select 2: Manual Setup.
3. Select 2: Pressure.
4. Select 2: Transfer Function and choose either Linear or Square Root.
Figure 2-2. Square Root Output Transition Point
Fast Keys
2, 2, 2, 2
Sq. Root
Curve
Transition Point
Linear Section
Slope=1
Slope=42
Transition Point
Sq. Root Curve
Full Scale
Flow (%)