Vega VEGAPULS 61 (≥ 2.0.0 - ≤ 3.8) 4 … 20 mA__HART two- Bedienungsanleitung PDF herunterladen (Seite 10)

The type label contains the most important data for identiﬁcation

and

use of the instrument:

l Instrument type

l Article and serial number device

l Article numbers, documentation

l Technical 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)

With the serial number, you can access the delivery data of the

instrument via

www.vega.com, "VEGA T

ools" 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.

The version with encapsulated antenna system is particularly

suitable for level measurement of aggressive liquids in small vessels.

The version with plastic horn antenna is particularly suitable for ﬂow

measurement in open ﬂumes or gauge measurement in bodies of

water.

The electronics with increased sensitivity enables the use of

VEGAPULS 61 also in applications with very poor reﬂective properties

or products with low ε

value.

The 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.

Two-wire electronics 4 … 20 mA/HART for power supply and

measured value transmission over the same cable.

The supply voltage range can diﬀer depending on the instrument

version.

The data for power supply are speciﬁed in chapter "Technical data".

The backlight of the indicating and adjustment module is powered by

the sensor. The pr erequisite for this is a supply voltage at a certain

level. The exact voltage speciﬁcations are stated in chapter "Technical

data".

Type label

Application area

Functional principle

Voltage supply

10 VEGAPULS 61 • 4 … 20 mA/HAR

T two-wire

3 Product description

28434-EN-100426

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