Can small-signal cutoff make the valve close more tightly?
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This post was last edited by zlc404109867 on 2017-1-4 22:26. Request an explanation of the principle of the piezoelectric valve in Siemens double-acting positioners
The small signal you mentioned – what kind of small signal is it?
When we talk about small-signal rejection, it refers to flowmeters
Generally, only differential pressure flowmeters have small signal rejection.
When the valve is fully closed, it is adjusted via the positioner; reducing the signal is intended for flow control. When the valve is fully closed, there may be leakage of flow, and in such cases the signal needs to be reduced
Basic types of flow meters such as electromagnetic and vortex flow meters are available
The small-signal cut-off function affects the flow meter; it merely hides low flow rates rather than eliminating them entirely. What the flow meter displays is 0, which leads one to think that the valve is closed more tightly
It has been blocked. . . . No one told me before. ! ! ! !
What does PHC mean in a PID diagram?