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| Measuring 100A DC current |
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| 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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