COATING FILM DETERIORATION DIAGNOSTIC DEVICE, COATING FILM IMPEDANCE MEASURING INSTRUMENT, AND TOOL FOR CALIBRATION

摘要

PROBLEM TO BE SOLVED: To provide a coating film deterioration diagnostic device for surely and simply performing calibration when required. SOLUTION: An impedance measuring part 24 is equipped with a switch circuit 21 and a calibration resistor 22. The output of a current detection circuit 3 is switched to the calibration resistor 22 by means of the switch circuit 21 to perform the calibration. COPYRIGHT: (C)2005,JPO&NCIPI