Reference Manual
00809-0100-4024, Rev BA
September 2005
Rosemount 5600 Series
1-6
The 5600 Series Radar Level Transmitter sends a microwave signal with a
continuously varying frequency towards the product surface. When the
reflected signal returns to the antenna, it is mixed with the outgoing signal.
Since the transmitter continuously changes the frequency of the transmitted
signal, there will be a difference in frequency between the transmitted and the
reflected signals.
The transmitter mixes the two signals, resulting in a low frequency signal
which is proportional to the distance to the product surface. This signal can be
measured very accurately allowing fast, reliable, and accurate level
measurements.
The 5600 Series Radar Level Transmitter uses micro frequency to reduce
sensitivity to vapor, foam, and contamination of the antenna, and keeps the
radar beam narrow in order to minimize influence from walls and disturbing
objects.
The 5600 Series Radar Level Transmitter uses Fast Fourier Transformation
(FFT), which is a well established signal processing technique, to obtain a
frequency spectrum of all echoes in the tank. From this frequency spectrum
the surface level is extracted. In combination with the echofixer, FFT allows
measurements in tanks with agitators, mixers and other disturbing objects.
The echofixer provides a technique to adapt measurements to various
situations, by using information from previous measurements.
SPECIFIC FCC
REQUIREMENTS
(USA ONLY)
This device complies with part 15 of the FCC Rules. Operation is subject to
the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
The Rosemount 5600 generates and uses radio frequency energy. If it is not
installed and used properly (in strict accordance with the manufacturer´s
instructions) it may violate FCC regulations on radio frequency emission.
Installation on non-metallic tanks, tanks with open manholes,
external-floating-roof tanks without stillpipes etc. are not covered by this
certificate, and require a Part 90 site-license. If you have an installation like
this, contact your local Emerson Process Management representative for help
with the necessary license application.
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