Detecting HV transients

high

A neon bulb, NE-2 type, and a 80-100 volt low current supply (battery?).

Put the bulb across the supply. If the bulb lights up, reduce the voltage supply until it's just below that point. Place the bulb so that the glass touches the signal line. Just the glass, no other part of the bulb circuit.

When the HV pulse comes along it will ionize the neon gas and the bulb will light and stay lit even after the pulse goes away if the bulb's supply voltage is set properly.

That way you don't have to sit and watch the thing. If you come back to it and the light's on, you no a transient happened.

Jim

HI all,

What's the best way to check for the presence on a signal line of high voltage transients? I can't readily think of an instrument that would fit the bill. :-| Talkin' 'bout maybe a couple of thousand (high impedance) volts at

non contact em field measurements, rogowski coil or differential B/E dot....

On Fri, 31 Dec 2004 05:32:05 GMT, "Marc H.Popek" wroth:

Or biased neon bulb.

Jim