VEGA VEGAFLEX 81 HART - integrated accumulator - Manual (Page 11)

11
3 Product description
VEGAFLEX 81 • HART - integrated accumulator
44640-EN-130430
This operating instructions manual applies to the following instrument
versions:
•
Hardware from 1.0.0
•
Software from 1.0.0
•
Only for instrument versions without SIL qualification
The instrument and the electronics version can be determined via the
product code on the type label as well as on the electronics.
•
Standard electronics: Type FX80H.-
The scope of delivery encompasses:
•
Sensor with integrated accumulator
•
Battery charger
•
Documentation
– this operating instructions manual
– Test certificate measuring accuracy (optional)
– Operating instructions manual "Display and adjustment mod-
ule" (optional)
– Ex-specific "Safety instructions" (with Ex versions)
– if necessary, further certificates
3.2 Principle of operation
The VEGAFLEX 81 is a level sensor with cable or rod probe for
continuous level or interface measurement, suitable for applications
in liquids.
High frequency microwave pulses are guided along a steel cable or
a rod. Upon reaching the product surface, the microwave pulses are
reflected. The running time is evaluated by the instrument and output-
ted as level.
d
h
1
Fig. 5: Level measurement
1 Sensor reference plane (seal surface of the process fitting)
d Distance to the interface (HART value 1)
h Height - Level
Scope of this operating
instructions manual
Versions
Scope of delivery
Application area
Functional principle -
level measurement