Emerson 00809-0100-4102 manual Set transmitter percent of range transfer function

Reference Manual	Section 2: Configuration
00809-0100-4102, Rev AA	May 2013

2.5.3Set transmitter percent of range (transfer function)

The Rosemount 2051 Wireless transmitter has two transfer functions for pressure applications: Linear and Square Root. As shown in Figure 2-2 on page 15, activating the square root options the transmitter analog output proportional to flow.

However, for DP Flow and DP Level applications it is recommended to use Scaled Variable. Refer to “Diagnostics and service” on page 24 for setup instructions.

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.

Setting transmitter output with a Field Communicator

From the HOME screen, enter the fast key sequence

Fast Keys 2, 2, 4, 2

Setting transmitter output with AMS Device Manager

Right click on the device and select Configure.

1.Click Manual Setup and choose output type from Transfer Function and click Send.

2.Carefully read the warning and click Yes if it is safe to apply the changes.

Figure 2-2. Square Root Output Transition Point

Full Scale			Sq. Root
Flow (%)			Curve
		Sq. Root Curve
	Transition Point		Transition Point
			Linear Section

Slope=42

Slope=1

Configuration 15