Principle Of Operation - Vega VEGAPULS 62 Operating Instructions Manual

3 Product description
Scope of this operating
instructions
Electronics versions
Scope of delivery
Application area
Functional principle
12
This operating instructions manual applies to the following instrument
versions:
•
Hardware from 2.1.1
•
Software from 4.5.2
The instrument is available in two different electronics versions. Each
version can be identified via the product code on the type label as
well as on the electronics.
•
Standard electronics type PS60PAK.-
•
Electronics with increased sensitivity type PS60PAS.-
The scope of delivery encompasses:
•
Radar sensor
•
Documentation
– Quick setup guide VEGAPULS 62
– Instructions for optional instrument features
– Ex-specific "Safety instructions" (with Ex versions)
– If necessary, further certificates
Information:
The optional instrument features are described in the operating
instructions manual. The respective scope of delivery results from the
order specification.
3.2

Principle of operation

The VEGAPULS 62 radar sensor can be used in a wide variety of ap-
plications for continuous level measurement of liquids. It is suitable for
applications in storage vessels, reactors and process vessels, even
under extremely difficult process conditions.
Dependent on the application range, different versions are used:
•
Antenna
– Small tanks and process vessels, measurement of virtually all
products: Horn antenna ø 40 mm
– Storage tanks and process vessels, measurement of products
such as solvents, hydrocarbons and fuels under extremely dif-
ficult process conditions: Horn antenna ø 48 ... 95 mm
– Products with low ε
Parabolic antenna
•
Electronics
– Products with an ε
– Products with an ε
reflective properties: Electronics with increased sensitivity
The actual values that can be reached depend on the measurement
conditions, the antenna system or the standpipe or bypass.
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 transit time of the radar
pulses from emission to reception is proportional to the distance and
value with large measuring distances:
r
value ≥ 1.8: Standard electronics
r
value < 1.8, ≥1.5; applications with very bad
r
VEGAPULS 62 • Profibus PA