Burkert Type 8623 - Manual (Page 7)

8623-2-Standard - 5
english
2 FUNCTION
The flow controller type 8623-2 is primarily designed, in connection with a
proportional valve and a flow sensor with frequency output, to keep constant
the flow rate in a fluidic system or to follow a given setpoint profile.
The functionality of the device is characterized by:
• Compact design, capable of direct installation on the proportional valve.
• May be combined with valve types 6022, 6023, 6024, 6223, 2832, 2834.
• Controller ouput directly to proportional valve in the form of a PWM signal;
this minimizes hysteresis and optimizes the control performance.
• Any flow sensor providing a frequency signal of a max. of 1000 Hz can be
connected to the actual value input.
• The standard signal inputs can be scaled to the control range actually
required (with standard model only).
• Setting of setpoint value via standard 4 - 20 mA or 0 - 10 V signal, keypad
or bus.
• Digital control with a PI control algorithm and settable control parameters.
• Ratio control
• Display of setpoint or actual values (to choice) on an LCD display.
• Configuration with three keys.
For other measured variables, such as pressure, conductivity, temperature,
etc., we offer similar control devices, e.g:
Type 8624-2 for control of pressure, flow rate or the like with input for a
transmitter providing 4 - 20 mA or 0 - 10 V.
Type 8625-2 for temperature control with PT100 input for the sensor