| 摘要 |
An impedance measuring apparatus for a device (10) is provided with a reference resistor part (20) and the relative error among measurement ranges is corrected automatically using the reference resistor. A single range is calibrated using a single impedance standard so that absolute calibration is carried out for all of the ranges. A signal normalizing part (60) is placed on the front section of an A-D converter (70) and another signal normalizing part (40) is placed on the front section of a frequency converter (52).
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