VEGA VEGAFLEX 51K - Manual (Page 4)

4 VEGAFLEX 51K
Product description
1 Product description
1.1 Function
High frequency microwave impulses are
guided along a steel rope.
The microwave impulses are reflected when
reaching 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 sol-
ids. Density, conductivity and dielectric value
of the product do not influence the measure-
ment. Also, varying product properties can-
not influence the measured value.
Lime, cement, cereals, plastic granules, flour,
gravel - VEGAFLEX microwave sensors
solve the most difficult application problems
involving solids. Even in products with vary-
ing moisture or fluctuating dielectric constant,
the level is reliably detected. High, narrow
vessels in which a non-contact measuring
principle often delivers less than optimum
measuring results, can be measured without
problem by VEGAFLEX. VEGAFLEX 51 is
equipped with a cable of 4 mm diameter and
is available up to a length of 10 m.
• Adjustment without filling or emptying of the
vessel.
• 4 … 20 mA two-wire sensors, supply and
measuring signal via one two-wire cable
(loop powered).
• Up to 15 sensors can be connected via
one two-wire cable.
• Measuring range up to 10 m with small min.
distance.
• Unaffected by application conditions such
as:
- dust and noise generation
- moisture changes
- varying products
• Existing cable systems can be still used in
four-wire technology.
• Unaffected by the vessel material, e.g.
metal, concrete, plastic etc.
• As an option, the display with adjustment
can be separated from the sensor.
• Connection to all bus systems: Modbus,
Interbus S, Siemens 3964R, Profibus DP,
Profibus FMS, ASCII.
• Low wiring costs by using bus systems or
two-wire technology.
1.2 Application features
Applications
• Level measurement of solids.
• Measurement also in vacuum.
• All slightly conductive substances and all
substances with a dielectric value
e
r
> 1.8
can be measured.
• Measuring range 0 ... 10 m.
Two-wire technology
• Supply, signal transmission and output
signal on one two-wire cable.
• 4 … 20 mA output signal or digital output
signal.
Rugged
• Highly resistant materials: PA, 1.4401.
Precise and reliable
• Resolution 1 mm.
• Unaffected by noise, steam, dusts, gas
compositions and inert gas stratification.
• Unaffected by varying density.
• Measurements under pressure up to
16 bar and with product temperatures up
to 120°C.
Communicative
• Integrated display of measured values.
• As an option, display can be separated
from the sensor.
• Adjustment from the PLC level.
Approvals
• Ex Zone 0
- EExd ia IIC
- EEx ia IIC
• ATEX
• StEx Zone 10