| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an impedance measuring instrument for performing measurement with high precision, and measuring even a low impedance, and also to provide a health management guide advice apparatus. <P>SOLUTION: A voltage amplifier part 7 for amplifying the output of a current drive part 4 to supply a current to a current electrode 2, and a differential amplifier part 8 for amplifying the output of a voltage electrode part 3 are connected to an A/D converting part 10 via an analog switch 9 so as to enable the mutual changeover. The voltage amplifier part 7 is connected to the A/D converting part 10 so as to detect the output waveform of the current drive part 4 through the use of a CPU 6. The impedance of an object to be measured is not measured when the output waveform is not normal. When the waveform is normal, the analog switch 9 is changed-over to connect the differential amplifier part 8 to the A/D converting part 10, so that the impedance of the object to be measured is measured. <P>COPYRIGHT: (C)2004,JPO |
