VEGA VEGAFLEX 81 4 … 20 mA_HART two-wire Coax probe With SIL qualification - Manual (Page 10)

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3 Product description
VEGAFLEX 81 • 4 … 20 mA/HART two-wire
44216-EN-130823
•
Enter the serial number manually in the app
This operating instructions manual applies to the following instrument
versions:
•
Hardware from 1.0.0
•
Software from 1.0.0
•
DTM from version 1.67.2
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.-SIL
The scope of delivery encompasses:
•
Sensor
•
Documentation
– this operating instructions manual
– Safety Manual (SIL)
– Test certificate measuring accuracy (optional)
– Operating instructions manual "Display and adjustment mod-
ule" (optional)
– Supplementary instructions "GSM/GPRS radio module"
(optional)
– Supplementary instructions manual "Heating for display 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 VEGAFLEX 81 is a level sensor with coax probe for continuous
level or interface measurement, suitable for applications in liquids.
Due to the qualification up to SIL2 or homogeneous redundant up to
SIL3 (IEC 61508) the VEGAFLEX 81 is suitable for the use in safety-
instrumented systems (SIS).
The safety function (SIF) can be a monitoring of the max. or min. level
or a combination of both.
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.
Scope of this operating
instructions manual
Versions
Scope of delivery
Application area
Functional principle -
level measurement