Burkert Type S039 - Manual (Page 6)

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flow rate controller 8039
2.1 design
The flow rate controller 8039 is made up of an electronic module SE39
and a fitting S039 with integrated paddle-wheel. It may switch a solenoid
valve, activate an alarm or establish a control loop.
Furthermore, the version with a frequency output makes it possible to
transmit the paddle-wheel rotation speed (2 pulses/paddle-wheel turn)
directly to a PLC.
The switching point can be adjusted by means of the three keys located
under the display.
The electrical connection is carried out via an EN175301-803 connector
and/or a steerable M12 multipin connector.
2.2 measuring principle
The controller 8039 detects the rotation of the S039 fitting paddle-wheel.
The latter produces pulses whose frequency is proportional to the flow
rate (f = K.Q, where f is the frequency in Hz, K the K factor specific to
each fitting in pulses/l and Q the flow rate in l/s).
the flow rate is only taken into account if the medium flows in
the direction indicated by the arrow marked on the housing.
2 description
S039
SE39