公开(公告)号：JPH01318974A

公开(公告)日：1989-12-25

申请号：JP15309688

申请日：1988-06-20

Applicant: TOA ELECTRONICS

Inventor： SHIMADA KOICHI ,  UEI SHUNICHI ,  UENO ATSUO

IPC: G01R27/02

Abstract: PURPOSE:To prevent transition current when specimen incorporates a capacitive component and to perform measurement even if the specimen includes a short- circuiting element without trouble, by supplying preparation current under the state wherein ammeters are bypassed in starting measurement. CONSTITUTION:When a capacitive component is included in a specimen X, transition current flows through ammeters I. It takes a long time to attain a balanced state. Therefore, during the preparation period at the beginning of the measurement, a first switch S11 in a resistance measuring circuit I1 and a second switch S21 in a resistance measuring circuit I1 are both turned ON. The current is supplied to the specimen X without through the ammeters I1a and I1b. In this way, a time until a steady state is achieved is shortened. When the specimen is a short-circuiting element, the current through a current limiting circuit IL1 is increased, but a constant voltage element VL1 becomes ON. Since the terminal voltage of a power source is kept at a constant value, measurement can be performed without trouble.