VEGA VEGAPULS 68 (≥ 2.0.0 - ≥ 4.0.0) Foundation Fieldbus - Manual (Page 11)

11
3 Product description
VEGAPULS 68 • Foundation Fieldbus
36538-EN-121011
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 PS60FFC.-
•
Electronics with increased sensitivity type PS60FFS.-
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 mod-
ule PLICSCOM" (optional)
– Supplementary instructions "GSM/GPRS radio module"
(optional)
– Supplementary instructions manual "Heating for indicating and
adjustment module" (optional)
– Supplementary instructions manual "Plug connector for con-
tinuously measuring sensors" (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.
Versions
Scope of delivery
Application area
Functional principle