| 摘要 |
PURPOSE:To decrease the time of measurement, by comparing voltage value of a sample to be measured with that of a reference element by a comparator, and displaying the impedance of the reference element when the coincidence is obtained in the above-mentioned comparison. CONSTITUTION:A fixed level of current is supplied to a sample 2 to be measured and a reference element 3 respectively from an oscillator 1. A comparator 8 performs a comparison of output between AC/DC converters 6 and 7 and actuates a light emitting diode (b) of a deciding/displaying circuit 9 when X=R is satisfied between the impedance X of the sample 2 and the impedance R of the element 3. With the impedance R is varied, a switch S is closed when the diode (b) emits light, the impedance of the element 3 is displayed at an impedance display circuit 10. |
