4-Wire Milliohm-meter. Something that was missing from my tool collection!
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- Опубліковано 2 лип 2024
- Hi, in this video I am introducing a newly acquired resistance meter. Have you ever asked yourself how to measure really small resistances accurately?
This is the Milliohm-meter I bought (non-affiliated!):
www.aliexpress.com/item/10050...
There are two meters with different range, be careful to get the right one! I have got the 2R (2 Ohms) version.
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Interesting. Thanks for sharing Roland.
TBF a meter with REL might be nice for such measurements. Zoyi also make a ZT303 which as 20,000 counts and REL. There are many projects on youtube that make a current source. If you supply 10mA or 100mA with leads, you can use any multimeter in millivolts mode to also read the resistance value, by ohm's law. If you want to do things very cheap. But a self contained unit such that you demonstrate is nice to have.
Zt303 is very good for diy milliohm tests.
Something ‘ that ‘ was missing from my ‘tool’ collection’ to be correct.
Have you tried making finer tip probes .. The probe clips are too thick for smd
well, I didn't change anything as those clips worked for me. I don't clip onto the components, just touch them with the edge of the clip. But I think it would be possible to even maybe solder a very short tip between the 2 fingers. Just keep the injector side and probe side near to the point of measurement.
@@RolandW_DIYEnergyandMore I found some 'four-wire' probes typically sold for the YR1035 (aliexpress part 1005007203133289). They have dual tips that are 1mm apart .. I will buy these and terminate to a green block
@@technomad900 yes, for the YR1035 there are the normal probes wich are used for battery terminals and also component probes. I have the meter but only the normal probes which are not suitable to work on a PCB.
I have the YR1030+ to measure internal resistance of batteries and other low resistances (cost me 550Baht) I thought you have it too? Is there any difference?
Sorry. I have just tried out the battery meter and it works as well. I have failed to do it before, as it is very tricky with those spring loaded probes to work on components or PCB pins as the tips are to far apart. I just saw that there are offers with other probes included as well which I don't have. So yeah, you are correct :)
That device is using AC signal to measure devices I suspect, whereas this one uses DC current. Both methods can work for single resistors
Is it possible to zero the instrument? thx...
I want to know too.
not that I know...
thank you.... @@RolandW_DIYEnergyandMore
My 9.99 euro multimeter has capability to measure max 2ohms in 1milkiohms resolution... Is it bad? It can change resolution to 100 milliohms and then the max is also 20 ohms
I always have a feeling my cheap multimeter lies and is not precise, too many function for such low price, this new way with 4 wires is cool cause it removes the probe noise\error
measuring values well below 1 ohm with 2 wire methode will return inevitable faulse measurements. For the 10 euros you have most certainly got the "all in one - wonder" Meter. Nothing wrong with a cheap meters, its just some features might be just out of the marketing booklet only so you should always double check. find a low value shunt resistor on a board, read the value which is written on it and make a measurement. Then just see what the meter claims ;)
@@RolandW_DIYEnergyandMore the manual it came with is telling about +\- 1% but I always disliked the probes margin of error, your ohm meter looks way better xD I'll see if I can get one cause I often have to mess with r005 resistors
@@manuelmozzali-ie2xe yes. If you need to measure such components, then you should definitely get a specialized 4 wire meter
You used the word precise saying it is not precise. Don't confuse precision with accuracy.
Your meter may have precision but not be accurate. And I would suggest this is the case.
What use is a meter that has high precision but have low accuracy?
@@deang5622 that's what I meant yes, accurate xD my bad I'm italian