What should be adjusted first on a pressure switch with an adjustable differential?

In a pressure switch with an adjustable differential, the differential setting is crucial because it determines the range of pressure within which the switch operates. Adjusting the differential first allows for a proper understanding of the operational range of the switch before making any further adjustments.

The differential sets the difference between the pickup point and the cutoff point. If the differential is not adjusted first, any changes made to the pickup or cutoff points may not result in the desired activation levels. Starting with the differential ensures that the switch operates effectively within the parameters required for the specific application, thereby preventing overshooting or undershooting the intended pressure settings.

Once the differential is established, you can then adjust the pickup point and cutoff point accordingly to fit the specific operational requirements, ensuring that the overall functionality aligns with the system design and safety protocols. This systematic approach helps maintain accurate pressure control and enhances the reliability of the system.