Cable shield resistance test set
US5391991A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 29, 1993 |
| Grant date | Feb 21, 1995 |
| Priority date | — |
| Expiry date | Sep 29, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R27/08
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A technique and apparatus for measurement of resistances of 0.025 ohm and ss without disconnection from the circuit. The invention is used for measurement of degradation in cable shields. The method can also be used for measurement of junction resistances in high current circuits such as auto starters. The invention allows measurements to be made with the circuits connected so that the faults are present in the measurement setup. The method includes inductive coupling of long duration repetitive current pulses onto the circuit under test, measurement and display of induced current and voltage pulses, and display of induced current and voltage pulses on an oscilloscope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.