Automatic calibration system for data acquisition unit based on virtual instrumentation
To develop an automatic calibration system of the data acquisition unit,which based on virtu-al instrumentation,programmable multiplexer switch and relay modules,this paper described the com-position of the system,developed the user management program,standard management program and au-tomatic calibration programs(including control programs of measurement standards,UUT,switch and relay modules,data processing programs and record generating programs).This system solved the prob-lem of time-consuming,low efficient and error prone manual calibration procedure.Comparing with the semi-automation with remote control of the measurement standards and UUT,which means human labor still need to be involved to execute channel switching,this system realized the real sense of full automa-tion.This system has the advantages of high efficiency,strong stability and low human costs.With this system,90％of calibration time could be saved,and the calibration results are accurate and reliable.
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