Emerson Rosemount 3300 Series Instrukcja Użytkownika Pobierz pdf (Strona 2)

Product Data Sheet

00813-0100-4811, Rev DA

Catalog 2008 - 2009

Rosemount 3300 Series

Level-2

Measurement Principle

Rosemount 3300 Series is based on the Time

Domain Reflectometry (TDR) technology.

Low power nano-second microwave pulses are

guided down a probe submerged in the process

media.

When a radar pulse reaches media with a different

dielectric constant, part of the energy is reflected

back to the transmitter. The time difference between

the transmitted (reference) and the reflected pulse is

converted into a distance from which the total level or

interface level is calculated.

The intensity of the reflection depends on the

dielectric constant of the product. The higher the

dielectric constant value is, the stronger the reflection

will be.

The transmitter uses Dynamic Gain Optimization™

which means it automatically adjusts gain to

maximize the signal-to-noise ratio in each

application. This increases measurement reliability

and capability.

Applications

The Rosemount 3300 Series can be used for level

measurements on most liquids, semi-liquids, some

solids and liquid/liquid interfaces.

The 3300 Series consists of two models:

• Rosemount 3301, Guided Wave Radar Level

Transmitter for liquids and some solids.

• Rosemount 3302, Multivariable™ Guided

Wave Radar Level and Interface Transmitter

for liquids.

Rosemount 3300 Guided Wave Radar transmitters

offer high reliability and performance.

Measurements are virtually unaffected by

temperature, pressure, vapor gas mixtures, density,

turbulence, bubbling/boiling, varying dielectric media,

and viscosity.

Since the waves are guided along the probe, this

technology is excellent for small and narrow tanks /

tank openings.

The Rosemount 3300 Series is suitable for

measurements in the following industries:

• Oil, gas and refining

• Chemical and petrochemical

•Power

• Pulp and paper

• Water and sewage treatment

• Food and beverage

• Pharmaceutical

Reference

pulse

Level

Time

Interface

Level

1 2 3 4 5 6 7 ... 37 38

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