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High current pulse measurement
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Hawaka:
Hello,

For work I'm looking to replace our high current pulse measurement setup. We are currently using a CT5 Tektronix with a TCP312A current probe and a TCPA300 amplifier. The current pulse are max 1600Apeak, rise time 20A/us (might be higher as this could be limited by the measurement setup), tpulse max 50ms. The measure needs to be isolated, as the current conductor is about 500V above earth.

I am aware that what we are trying to measure is outside what the probes are design for, but we don't have anything better…

The PEM CWT15 / CWT mini 15 (https://tinyurl.com/28p9bphw) or a Pearson Electronic (maybe a 4418) (https://tinyurl.com/4c6fmjcu) would be a good choice, but these are pretty expensive.

Do anyone knows a better way to measure such current? A shunt with an amplifier would be for sure easy and affordable, but the isolation is missing...
voltsandjolts:

--- Quote from: Hawaka on July 29, 2023, 09:41:46 am ---A shunt with an amplifier would be for sure easy and affordable, but the isolation is missing...

--- End quote ---

Add the isolation after the shunt / amplifier / digitiser and use a floating supply for it (battery?).
Hawaka:
We use a scope as a digitiser, so not really an option....
nctnico:
I'd use a shunt and an isolation amplifier for these sort of measurements. An oscilloscope with isolated inputs is even more convenient. I have a Yokogawa oscilloscope with isolated inputs and 12 bit resolution.
dmendesf:
Shunt+AMC3302 = WIN
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