Siemens SITRANS LR250 Operating Instructions Manual page 296
Radar transmitters profibus pa
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Also See for SITRANS LR250:
- Operating instructions manual (294 pages) ,
- Quick start manual (272 pages) ,
- Instruction manual (175 pages)
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Glossary
frequency
the number of periods occurring per unit time. Frequency may be stated in cycles per second.
hertz (Hz):
unit of frequency, one cycle per second. 1 Gigahertz (GHz) is equal to 10
horn antenna
a conical, horn-shaped antenna which focuses microwave signals. The larger the horn diameter,
the more focused the radar beam.
inductance
the property of an electric circuit by virtue of which a varying current induces an electromotive
force in that circuit or in a neighboring circuit. The unit is a Henry.
microwaves
the term for the electromagnetic frequencies occupying the portion of the radio frequency
spectrum from 1 GHz to 300 GHz.
multiple echoes
secondary echoes that appear as double, triple, or quadruple echoes in the distance from the
target echo.
Near Blanking
see Blanking.
nozzle
a length of pipe mounted onto a vessel that supports the flange.
parameters
in programming, variables that are given constant values for specific purposes or processes.
polarization
the property of a radiated electromagnetic wave describing the time-varying direction and
amplitude of the electric field vector.
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Hz.
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SITRANS LR250 (PROFIBUS PA)
Operating Instructions, 08/2014, A5E32221386-AC
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Troubleshooting
