What tool is typically used to adjust pressure settings in hydraulic systems?

The tool that is typically used to adjust pressure settings in hydraulic systems is a pressure regulator or an adjusting knob. A pressure regulator is specifically designed to maintain and control pressure within a system, ensuring that the pressure remains at a desired set point regardless of changes in flow or demand within the system. The adjusting knob allows for manual changes to be made to the pressure settings, providing the operator with the ability to fine-tune the pressure to meet specific operational requirements.

In contrast, while a pressure relief valve is essential for preventing overpressure situations by venting excess fluid, it does not adjust or set pressure; it simply reacts to pressure that exceeds a predetermined level. A flow meter measures the flow rate of the fluid, and while it is important for monitoring system performance, it does not directly influence or adjust pressure settings. A digital pressure gauge provides a readout of the pressure within the system but also does not have the capability to adjust the pressure; it only displays information to the operator. Therefore, the most suitable answer for adjusting pressure settings is the pressure regulator or adjusting knob.