Patent ID: 8488167

Claim:
A computerized chart recorder, comprising: a signal conversion unit, receiving a plurality of measurement signal of a measurement instrument, and converting said plurality of measurement signals to a plurality of signal conversion data; an operation control unit, connecting to said signal conversion unit, receiving said plurality of signal conversion data, operating said plurality of signal conversion data, producing chart data for producing a curve of signal variations of the instrument, and producing quality assurance data corresponding to said curve of signal variations of the instrument according to said plurality of signal conversion data; a database, receiving a plurality of control instructions of said operation control unit for storing said chart data and said corresponding quality assurance data; and a printing control unit, receiving said plurality of control instructions of said operation control unit, and producing a corresponding printing control signal for controlling a printing unit to print said corresponding curve of signal variations of the instrument of said plurality of signal conversion data of the instrument signals, alarm messages, and said corresponding quality assurance data; and a human-machine interface unit, setting the method of said operation control unit printing said plurality of signal conversion data acquired by said signal conversion unit for determining the output amplitude and the percentage range and for setting specific a threshold value, and said operation control unit producing said alarm messages according to said threshold value, and said human-machine interface unit displaying graphically the inspection locations.