Functions - Burkert 8624-2 Standard Instructions De Service

2

FUNCTIONS

The flow pressure controller type 8624-2 is primarily designed, in connection
with a proportional valve and a pressure transmitter, to keep constant the
pressure at a point in a fluidic system or to follow a given setpoint value.
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 transmitter providing a 4 - 20 mA or 0 - 10 V signal can be connected
to the actual value input.
• The standard signal inputs can be scaled to the control range actually
required.
• 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.
• Display of setpoint or actual values (to choice) on an LCD display with
selectable number of decimal places.
• Configuration with three keys.
The controller type 8624-2 can control not only pressure but also other fluidic
parameters such as flow rate, conductivity, etc. For this purpose, the sensor
that measures the actual value of the relevant parameter must provide a
standard 4 - 20 mA or 0 - 10 V signal.
For applications in which the sensor provides other types of signal for the
actual value, we offer suitable controllers, e.g:
Type 8623-2 for flow rate control with frequency input for the sensor
Type 8625-2 for temperature control with PT100 input for the sensor
8624-2 Standard - 5