Digital Technique for Rapid Measurement of Time Lags

Abstract

A commercial 10-Mc digital chronometer has been used to measure time lags to breakdown in SF6/air mixtures. This method is much quicker than taking measurements from oscillograms and gives greater accuracy when a very wide range of time lags occurs for the same experimental condition. Precautionary measures against pickup from high voltage circuits are described, together with a method of producing pulses suitable for starting and stopping the chronometer.