Development of DC Spark-over Voltage Measuring Instrument for Gas Discharge Tube with Zooming Input Voltage

A novel DC spark-over voltage measuring instrument for gas discharge tube is presented in this paper. With a new voltage acquisition theory, which is detailed introduced in the paper, and a zooming input voltage as the testing voltage, the voltage value of gas discharge tube can be detected, when the electricity current passes the gas discharge tube and it is broken. The voltage value is DC spark-over voltage of the gas discharge tube. Hardware and software design are introduced in the paper. Experiment data show the design of the instrument is successful.