Emerson Process Management 5300 manual Transmitter Overview

Reference Manual

00809-0100-4530, Rev BA July 2009

Rosemount 5300 Series

Section 2 Transmitter Overview

Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-1

Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-2

Components of the Transmitter . . . . . . . . . . . . . . . . . . . . page 2-5

System Architecture . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-7

Probe Selection Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-9

Process Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-11

Vessel Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-14

Installation Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2-15

THEORY OF OPERATION The Rosemount 5300 Series Radar Transmitter is a smart, two-wire continuous level transmitter based on Time Domain Reflectometry (TDR) principles. Low power nano-second-pulses are guided along an immersed probe. When a pulse reaches the surface, part of the energy is reflected back to the transmitter, and the time difference between the generated and reflected pulse is converted into a distance, which calculates the total level or interface level (see below).

The reflectivity of the product is a key parameter for measurement performance. Media with a high dielectric constant gives better reflection and a longer measuring range.

Figure 2-1. Measurement Principle.

Signal Amplitude

Reference Pulse

Level

Interface Level

Time

www.rosemount.com