VEGA VEGAPULS 68 (≥ 2.0.0 - ≥ 4.0.0) 4 … 20 mA_HART - four-wire - Manual (Page 11)

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3 Product description
VEGAPULS 68 • 4 … 20 mA/HART - four-wire
36536-EN-121011
The scope of delivery encompasses:
•
Radar sensor
•
Documentation
– this operating instructions manual
– Test certificate Measurement accuracy, depending on the
instrument VEGAPULS 68 (optional)
– Operating instructions manual "Indicating and adjustment
module" (optional)
– Ex-specific "Safety instructions" (with Ex versions)
– if necessary, further certificates
3.2 Principle of operation
The VEGAPULS 68 is a radar sensor for continuous measurement of
bulk solids also under arduous process conditions and large measur-
ing ranges. It the ideal solution for level measurement in high silos,
large bunkers, stone crushers and melting furnaces. With different
antenna versions and materials, this sensor is the optimum solution
for virtually all applications and processes.
The instrument is also suitable for applications in liquids.
Dependent on the application range, different versions are used:
•
Small silos and vessels, measurement of virtually all bulk solids:
Horn antenna
•
Large silos and vessels, measurement of bulk solids with low ε
r
value: Parabolic antenna
•
Liquids: Parabolic antenna
The instrument can be used with products with an ε
r
value ≥1.5. The
actually achievable value depends on the measuring conditions and
the antenna system.
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
hence to the level. The determined level is converted into an appropri-
ate output signal and outputted as measured value.
3.3 Packaging, transport and storage
Your instrument was protected by packaging during transport. Its
capacity to handle normal loads during transport is assured by a test
according to DIN EN 24180.
The packaging of standard instruments consists of environment-
friendly, recyclable cardboard. For special versions, PE foam or PE
foil is also used. Dispose of the packaging material via specialised
recycling companies.
Transport must be carried out under consideration of the notes on the
transport packaging. Nonobservance of these instructions can cause
damage to the device.
Scope of delivery
Application area
Functional principle
Packaging
Transport