Hardi HC5500, Instruction Book

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7 - Menu 3 Calibration
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Menu 3.4 Regulation constant
Regulation constant
The sensitivity of pressure regulation valve can be adjusted. The goal is to find a value where the regulation does not
overshoot the set point, but slows down and stops right before the set point.
Increasing the regulation constant will give a faster response on the pressure regulation valve. If the constant is too high, the
valve will become unstable. There will also be excessive wear on the valve.
The range is in percent and is typically set between 30% to 50%. Begin with regulation constant set at 50%.
Monitor the regulation valve, does it overshoot? Then adjust until the valve slows down and stops right before the set point:
If yes it overshoots, reduce the regulation constant in steps of 5%.
If no it do not overshoot and the valve stops far away from the set point, then increase contant in steps of 5%.