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Rosemount 3300 Series

October 2014

www.rosemount.com

Proven, reliable, and easy to use guided wave radar

Measurement principle

Low power, nano-second microwave pulses are guided down a

probe submerged in the process media. When a microwave

pulse reaches a media with a different dielectric constant, part

of the energy is reflected back to the transmitter.

The transmitter uses the residual wave of the first reflection for

measuring the interface level. Part of the wave, which was not

reflected at the upper product surface, continues until it is

reflected at the lower product surface. The speed of this wave

depends fully on the dielectric constant of the upper product.

The time difference between the transmitted and the reflected

pulse is converted into a distance, and the total level or interface

level is then calculated. The reflection intensity depends on the

dielectric constant of the product. The higher the dielectric

constant value, the stronger the reflection.

Guided wave radar technology

benefits

 No moving parts and no re-calibration minimizes

maintenance

 Direct level measurement means no compensation needed

for changing process conditions (i.e. density, conductivity,

temperature, and pressure)

 Handles vapor and turbulence well

 Suitable for small tanks, difficult tank geometry, and

interfering obstacles

 Allows for easy upgrade

 Top down installation minimizes risk for leakages

Contents

Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Product Certifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Reference

pulse

Level

Interface

level

1 2 3 4 5 6 7 ... 43 44

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AMX Wave Wireless Accessories and Adapters none Manual de usuario Pagina 2