12
3 Product description
NCR-84 Two-wire 4 … 20 mA/HART
51141-EN-181127
The scope of delivery encompasses:
•
Radar sensor
•
Disc springs (flange version with encapsulated antenna system)
1)
•
Optional accessory
•
Documentation
– Quick setup guide VEGAPULS 64
– Instructions for optional instrument features
– Ex-specific "
Safety instructions
" (with Ex versions)
– If necessary, further certificates
Information:
In this operating instructions manual, the optional instrument features
are described. The respective scope of delivery results from the order
specification.
3.2 Principle of operation
VEGAPULS 64 is a radar sensor for continuous level measurement of
liquids.
The small process fittings offer particular advantages in small tanks or
tight mounting spaces. The very good signal focusing ensures the use
in vessels with many installations such as stirrers and heating spirals.
The VEGAPULS 64 is available with different antenna systems:
1
2
3
Fig. 2: Antenna systems VEGAPULS 64
1 Thread with integrated horn antenna
2 Plastic horn antenna
3 Flange with encapsulated antenna system
The instrument emits a continuous radar signal through its antenna.
This signal is frequency modulated in the form of a sawtooth wave.
The emitted signal is reflected by the medium and received by the
antenna as an echo with modified frequency. The frequency change is
proportional to the distance and is converted into the filling level.
Scope of delivery
Application area
Functional principle
1)
Use see chapter "Mounting instructions, sealing to the process"
925-0373 Rev A
