A mechatronics tech working in the trace (space outside of
the clean space) of a clean room is dealing with a vacuum pump capacitance
manometer. The Tech has access to the documentation package for this vacuum
system. That information indicates that a pressure gauge that uses a capacitor based
sensor will shift the current signal out of phase with the voltage signal and
that the current signal is expected to lead the voltage signal. The Tech knows the
pressure measurement in the vacuum chamber changes the voltage and current
values in the electric circuit of the vacuum chamber gauge because the chamber pressure
changes the capacitance of the sensor in that gauge's circuit. The two AC
signals shown below indicate the gage signals the Tech sees on an oscilloscope
when trouble shooting this system. The
Plot Legends indicate that the red dotted curve represents the current, and the
blue curve is the voltage signal. For
this specific situation, the values reflect a constant pressure situation in
the chamber.
Question
Do the two plots below represent what the technician might expect
to see in this constant pressure situation?
YES or NO Submit your answers below the blog post, or at www.fl-ate.org.
No comments :
Post a Comment