Design And Measuring Principle - Burkert 8025 Notice D'utilisation

2 DESCRIPTION

2.3 Design and measuring principle

Design
The compact flow transmitter combines a
flow sensor and a transducer with display in
a splash-proof plastic IP65 enclosure.
The sensor part consists of a transducer
and an open-cell paddle-wheel.
The transducer component converts the
measured signal and displays the actual
value.
The output signals are provided via a 4-pole
plug EN175301-803 or via two cable
glands.
The panel-mounted version consists of an
electronic board integrated in a front-cover.
The associated flow sensor is an 8020
or 8030 either with sinus or pulse output
signal in "Low Power" version only.
The transducer component converts the
measured signal and displays the actual
value.
The output signals are available on terminal
strips on the electronic board.
The wall-mounted version consists of a
transducer with display in a splash-proof
plastic IP65 enclosure.
The associated flow sensor is an 8020
or 8030 either with sinus or pulse output
signal in "Low Power" version only.
The transducer component converts the
measured signal and displays the actual
value.
The output signals are available on a ter-
minal strip inside the enclosure via 3 cable
glands.
FLOW TRANSMITTER 8025
Measuring Principle
When liquid flows through the pipe, 4
magnets inserted in the paddle-wheel set
in rotation produce a measuring signal in
the transducer (with sinus or pulse output
signal). The frequency modulated induced
voltage is proportional to the flow velocity of
the fluid.
A correlation coefficient (K-Factor) is neces-
sary to compute the flow rate value.
The correlation coefficient (in pulse/liter)
is available in the instruction manual of the
insertion fitting (S020).
The transducer without relay functions in a
2-wire circuit and requires a power supply
of 12...30 VDC. A 4...20 mA standard signal
is available as output signal, proportional to
the flow rate.
A polarized potential free pulse output is
available.
The transducer with two additional relays
functions in a 3-wire circuit. Limit values are
freely adjustable.
The flow transmitter 8025 with pulse output
signal measures a flow rate from 0.3 m/s.
The flow transmitter 8025 with sinus output
signal can measure a flow rate from 0.5 m/s.
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