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Rancilio Silvia Espresso Machine with PID Controller, showing 4 double shots back to back SV. Temperature set to my taste at 207F. Length of shots can be adjusted to user taste, but as you can see, Silvia is holding the Temp. for a full 30 seconds. compare the clips Silvia with NO PID, try doing this with no PID. SV. ( Set value Temperature) is not the true water temperature inside the boiler. SV. is only a reference point. We are controlling the reference point SV. in order to have an output of 200F degree Fahrenheit under the shower screen. The difference in temperature between the reference point SV. and the output under the shower screen, can vary depending on setups and use. More great information and video clips at www.pidsilvia.com
