Products > Test Equipment
Good clamp meter for low DC currents
Bobson:
APPA MA3 and MA5 have 1mA +- 1.8%+5D resolution according to specs. Dunno if they are available under Mastech, Benning or other label.
techneut:
--- Quote from: Martin72 on February 21, 2024, 10:37:48 pm ---I consider only 2% tolerance in the 60A range to be unbelievable.
As a rule, current clamps of this type are less accurate with increasing current.
In addition, there is this strange "roller coaster" of tolerances in the ACA range.
1.5%, then 2.5%, then back down to 2%.
It's tempting to buy and test them. ;)
--- End quote ---
I just ordered one from Banggood for €36. Just to see....
Martin72:
Here are the (photographed) results from the CM11 during the last calibration.
MathWizard:
I hardly ever use current measurements, (although my meters use currents for resistance measurements too) and in a lot of cases, I'd trust that less than some voltage measurement, but yeah then I'm probably going to use some some measured resistance anyways and Ohm's law....
But yeah how trustworthy are good DMM's or pico-ampmeter's at stuff like measuring input bias currents to op-amps ? I have a good book to read on precision measurement techniques, I need to read more...
https://download.tek.com/document/LowLevelHandbook_7Ed.pdf
https://www.ti.com/lit/ml/slap103/slap103.pdf
jackobo:
--- Quote from: wofritz on December 29, 2023, 08:27:11 am ---
--- Quote from: Martin72 on December 28, 2023, 08:33:12 pm ---I recently found a current clamp meter that has a dedicated mA range and is still cheap (under 100):
<Peaktech 4350>
--- End quote ---
I have this one. It is working quite well even in the DC mA range. Problem is zeroing. Best results are obtained if you zero it in the circuit and don't change the setup after that. But that's not possible if you can not switch off the device under test, which might be the reason to use a clamp meter in the first place.
--- End quote ---
Need one for possible car battery current leak detection, what do think would 4350 model fit for this purpose?thanks
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