VEGA VEGAPULS 61 (≥ 2.0.0 - ≤ 3.8) 4 … 20 mA__HART four-wire - Manual (Page 10)

T
he type label contains the most important data for identification and
use of the instrument:
l I nstrument 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 61 is a radar sensor in K-band (emitting frequency
approx. 26 GHz) for continuous level measurement.
T he version with encapsulated antenna system is particularly
suitable for level measurement of aggressive liquids in small vessels.
T he version with plastic horn antenna is particularly suitable for flow
measurement in open flumes or gauge measurement in bodies of
water.
T he electronics with increased sensitivity enables the use of
VEGAPULS 61 also in applications with very poor reflective properties
or products with low ε
r
value.
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.
T he background lighting of the indicating and adjustment module is
powered by the sensor. A certain level of operating voltage is required
for this. You can find the exact voltage specifications in chapter
"
Technical data".
Type label
Application area
Functional principle
Voltage supply
10 VEGAPULS 61 • 4 … 20 mA/HART four-wire
3 P roduct description
28439
-EN
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