Products > Test Equipment
Measuring 100A DC current
coromonadalix:
:-DD
even with 34410a 34411a or k2000 even uncalibrated you get around 0.003% precision but your shunt will never be as precise loll
and yes take an 200 amp minimum to avoid drift
and please be realistic of your needs and measurement capacity
ArdWar:
I don't think even the best reputed shunt manufacturers offer 0.2% accuracy, much less 0.1%.
It's current shunt, if you need accuracy you're expected to calibrate out for gain errors. The sought after qualities here is usually the temperature coefficient instead.
gaminn:
I'm probably OK with that 100A Murata shunt, most often I will be in 50 - 60 A range. If I need it I will buy 200A 50mV version later.
I didn't know max. shunt accuracy offered by reputable manufacturers is 0.2%. Then the 0.1% chinese accuracy is bullshit. However I still like their shunt design with banana sockets.
gaminn:
--- Quote from: coromonadalix on June 07, 2024, 10:09:41 am --- :-DD
even with 34410a 34411a or k2000 even uncalibrated you get around 0.003% precision but your shunt will never be as precise loll
--- End quote ---
Yes, that's what I need - no more error added by the multimeter.
mariush:
Why not just parallel a bunch of resistors to get a low resistance ...
ex parallel 10 of these 10mOhm 4W resistors with 20 ppm/C to get a 1mOhm current shunt : https://www.digikey.com/en/products/detail/isabellenhuette-usa/VMS-R010-1-0-U/16836578
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