How an MKS Baratron® Capacitance Manometer Works
Electronics
The electronics are located adjacent to the sensor. The signal conditioning circuitry is very stable and produces a high level output. The electronics consist of a precision sine-wave oscillator that drives the bridge circuit. An imbalance in the sensor electrode capacitance produces a difference output that is amplified by the buffer. The offset, gain and linearity of the output are adjusted by the zero, span and linearity potentiometers.
Adjustment pots are provided for zero, span and linearity. The span and linearity
pots are covered and should only be adjusted by trained operators when performing
a calibration where the transducer can be compared to a reference standard.
NEXT: Zeroing
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