The measured value provided by the sensor is compared in the digital regulation electronics with the pre-defined set value according to the nominal signal. If a control difference is present, the control value output to the porportional valve will be modified using a PI-control algorithm.
In this way, the mass flow can be maintained at a fixed value or a predefined profile can be followed, independently of pressure variations or other changes in the system. As the control element, a proportional valve working at low friction guarantees a high sensitivity and the good regulation characteristics of the unit.
For further information about the Mass Flow Controller for Gases visit Burkert Fluid Control Systems at http://www.burkert.com.au
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