| 摘要 |
PURPOSE:To avoid waste of measurement by preventing an accident such as error measurement due to abnormal operation of a unit, by providing a circuit which detect abnormality of a detection system including a pre-amplifier and that of other electric circuit system. CONSTITUTION:To the output of analog memory circuit M, dead zone circuit 7 and analog comparator circuit 6 are connected and when the output of analog memory circuit M exceeds the allowable range of a set standard voltage due to the abnormality of a detection system including pre-amplifier A1, analog comparator circuit 6 outputs an abnormal signal pulse. Further, digital comparator circuit 4 is connected to display circuit 3, and when electric abnormality without the allowable range occurs to a circuit following pre-amplifier A1, digital comparator circuit 4 outputs an abnormal signal pulse. Then, gate circuit 5 is provided to outputs of both comparator circuits 6 and 6 to display ''NO'' and ''GO''. In this way, an accident such as error measurement of this unit can be prevented. |
