VEGA VEGAPULS 66 (≥ 2.0.0 - ≤ 3.8) 4 … 20 mA_HART four-wire - Manual (Page 9)

T
he type label contains the most important data for identification and
use of the instrument:
l S ensor type
l A
rticle and serial number device
l A rticle numbers documentation
l T echnical data: Approvals, antenna type, process fitting, process
seal/temperature, signal output, voltage supply, protection, pro-
tection class
l SIL identification (with SIL rating ex works)
W ith the serial number, you can access the delivery data of the
instrument via www.vega.com, "VEGA Tools" and "serial number
search". In addition to the type label outside, you can also find the
serial number on the inside of the instrument.
3.2 Principle of operation
VEGAPULS 66 is a radar sensor in C-band (emitting frequency
approx. 6 GHz) for continuous level measurement.
A special version of VEGAPULS 66 is available for each area of
application. The version with flange and horn antenna is particularly
suitable for measurement of liquids and solids under extremely difficult
process conditions such as buildup, condensate and foam generation
as well as vigorous product movement.
W ith the version without antenna horn, the antenna system is formed
in conjunction with a measuring tube (surge or bypass tube). This
version is particularly suitable for measurement of solvents and liquid
gases.
F or pressures up to 160 bar (2320 psi) and temperatures up to 400 °C
(752 °F) there are graphite seals and ceramic antenna cones
available.
T he antenna of the radar sensor emits short radar pulses with a
duration of approx. 1 ns. These pulses are reflected by the product
and received by the antenna as echoes. The running time of the radar
pulses from emission to reception is proportional to the distance and
hence to the level. The determined level is converted into an
appropriate output signal and outputted as measured value.
F our-wire electronics with separate power supply.
T he supply voltage range can differ depending on the instrument
version.
T he data for power supply are specified in chapter "Technical data".
M easured value transmission is carried out via the 4 … 20 mA/HART
output separate from power supply.
Type label
Application area
Functional principle
Power supply
VEGAPULS 66 • 4 … 20 mA/HART four-wire 9
3 P roduct description
28443
-EN
-090305