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Varying output Signals to Data Aquisition system

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afiqaris

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As attached, attempting to obtain analog signals for data acquisition and control system project.

the figure is the schematic design of the proposed transducer circuit.

findings are that the signals varies on the GUI.

assumption is the grounding design is wrong,yet unable to start a process of trial and elimination.

please give guidance and feedback on probable cause of varying analog signals and measures to overcome such findings.

kindly, please look at the schematics and any inputs and suggestions are very much appreciated.

tq.
 

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