VEGA VEGAFLEX 54P (Profibus PA) - Manual (Page 4)

4 VEGAFLEX 54P (Profibus PA)
Product description
1 Product description
1.1 Function
High frequency microwave impulses are
guided along a steel rope or a rod.
The microwave impulses are reflected when
they reach the product surface. The impulse
running time is processed by the integrated
electronics and outputted as level.
The sensors detect levels in all types of liq-
uids. Density, conductivity and dielectric
value of the product do not influence the
measurement. Continuously changing prop-
erties of the medium also do not influence the
measured value.
In many applications, VEGAFLEX microwave
sensors are the solution to difficult technical
problems. Even in products with varying or
fluctuating dielectric constant, the level is
reliably detected. In high, narrow vessels,
where non-contact measurement technolo-
gies often deliver less than optimal results,
VEGAFLEX carries out problem-free meas-
urements. VEGAFLEX 54 is optionally
equipped with a 4 mm diameter cable up to a
length of 20 m, or an 8 mm diameter rod up
to a length of 4 m.
• Adjustment without filling or emptying the
vessel.
• Two-wire sensor, power supply and digital
measuring signal via one two-wire cable
(loop powered).
• Up to 32 sensors can be connected via
one two-wire cable (Ex area: 8 sensors).
• Measuring range up to 20 m, very small
minimum measuring distance.
• Unaffected by application conditions such
as:
- varying products
• Unaffected by the vessel material, e.g.
metal, concrete, plastic etc.
• As an option, the display with adjustment
functions can be mounted separate from
the sensor.
• Low wiring costs through the use of two-
wire technology.
1.2 Application features
Applications
• Level measurement of liquids.
• Measurement also in vacuum.
• All slightly conductive substances and all
substances with a dielectric value
ε
r
> 1.7
can be measured.
• Measuring range 0 ... 20 m.
Two-wire technology
• Power supply, signal transmission and
output signal on one two-wire cable.
• 4 … 20 mA output signal or digital output
signal.
Rugged
• Highly resistant materials: PCTFE, 1.4435,
Hastelloy C22.
Precise and reliable
• Resolution 1 mm.
• Unaffected by noise, steam, gas composi-
tions and inert gas stratification.
• Unaffected by varying density.
• Measurements under pressure up to
40 bar and with product temperatures up
to 150°C.
Communicative
• Integrated measured value display.
• As an option, display can be mounted
separate from the sensor.
• Adjustment from the PLC level.
Approvals
• ATEX II 1 G or II 1/2 G or II 2 G EEx ia
II C T6
• ATEX II 1/2 G or II 2 G EEx d ia II C T6