公开(公告)号：JPH03175371A

公开(公告)日：1991-07-30

申请号：JP31415089

申请日：1989-12-05

Applicant: TOA ELECTRONICS

Inventor： SHIMADA KOICHI ,  NAGUMO SHOICHI

IPC: G01R27/02 ,  G01R31/02

Abstract: PURPOSE:To measure leakage resistance between lines with high accuracy by taking the difference between the measured parallel value and measured series value in the same resistor at every line with respect to each of a plurality of line resistors arranged in a zigzag pattern. CONSTITUTION:When switches S0, S13 are closed and the remaining switches are opened, the currents flowing through all of line resistors RS can be collectively measured. When there is no irregularity between the resistors RS, the readings of respective ammeters M become equal excepting a terminal wherein there is leakage between adjacent lines and, therefore, it is cleared what part between terminals there is leakage. Next, when switches S0, S2, S4... S10, S12, 813 are opened and the remaining switches are closed, the currents flowing through the resistors RS on the side of terminals T2, T4... T10 are detected. The switches S0, S1, S3... S11, S13 are opened and the remaining switches are closed, the currents flowing through the resistors RS on the side of terminals T1, T3... T9 are detected. AS mentioned above, by taking the difference between the measured parallel and series values in the same resistor at every line, the error due to the irregularity of resistance values is set off and the leakage resistance between lines can be measured with high accuracy.