AMX Wave Wireless Accessories and Adapters none Manual de usuario descargar pdf (Pagina 20)

Rosemount 3300 Series

October 2014

www.rosemount.com

Performance specifications

General

Reference Conditions Twin Lead probe, 77 °F (25 °C) water

Reference Accuracy

± 0.2 in. (5 mm) for probes 16.4 ft. (5 m)

± 0.1% of measured distance for rigid probes >16.4 ft. (5 m)

± 0.15% of measured distance for flexible probes >16.4 ft. (5 m)

Repeatability ± 0.04 in. (1 mm)

Ambient Temperature Effect Less than 0.01% of measured distance per °C

Update Interval 1 per second

Measuring range

Transition Zones

These zones are areas where

measurements are non-linear or have

reduced accuracy. If measurements are

desired at the very top of a tank, it is

possible to mechanically extend the

nozzle and use a coaxial probe. The

upper transition zone is then moved

into the extension. See Table 5 on

page 22.

Measuring Range and

Minimum Dielectric Constant

16 in. (0.4 m) to 77 ft. (23.5 m)

See Table 6 on page 22 for each probe’s measuring range and minimum dielectric constant. Due to

the measuring range depending on the application and factors described below, the values are a

guideline for clean liquids. For more information, ask your local Emerson Process Management

representative.

Different parameters (factors) affect the echo and therefore the maximum measuring range differs

depending on application according to:

 Disturbing objects close to the probe

 Media with higher dielectric constants (

) give better reflection and allow a longer measuring

range

 Surface foam and particles in the tank atmosphere may affect measuring performance

 Heavy coating or contamination on the probe should be avoided since it can reduce measuring

range and might cause erroneous level readings

Note

See Table 7 on page 23 for the measuring range when using the Remote Housing.

Upper Reference Point

Upper Transition Zone

Maximum

Recommended

Measuring Range

Lower Transition Zone

Lower Reference Point

Lower Transition Zone

For a flexible single lead probe with chuck,

the lower transition zone is measured

upwards from the upper part of the clamp.

Lower Transition Zone

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 43 44

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