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Deadband is also known as hysteresis and is the amount of a measured variable (pressure, temperature, etc.) between the point where a switch closes and then re-opens. It can be implemented is software if you have an analog input (i.e., open at 1.02 PSI, close at 0.98 PSI) or designed into a switching mechanism. Often the deadband of a switch is fixed and cannot be adjusted. A typical example is in a wall thermostat in your house.
First off, I would just like to start with what a pressure switch does. A pressure switch is the mechanism that will turn on and turn off the well pump based on the pressure in the water system.ow to adjust your pressure switch. You will notice in the below pictures a main or larger center spring and a smaller spring to the left. The larger center spring will adjust both the cut in and cut off pressure. If you turn the spring clockwise it will raise the cut in and cut off pressure.