You don't need to have 4 wire capability, all you need is a decent 2 wire meter with a Null function, short the leads together, press the null button and it will reset the display to read zero, then measure your .3ohm resistor and your meter will display .3ohms. A 4 wire meter is just spending more money, unnecessarily.
Ok, the URL seems to suffer from malignous redirection and some flunkie is posing as our friend Specmaster here!
Else it would be crystal clear that everyone should have at least one desk multimeter with 4 wire capability AND that the requirement to measure resistances below 1 Ohm is a perfectly good reason to aquire a milli/micro-Ohmmeter!
Nope it is I alright , but I was under the distinct impression that Vince was looking to raise some Euro's not spend some, and for measuring resistances of the value that he was looking at, there is no need for a 4 wire meter. I have 3 such meters myself and I can't recall ever having to use them in such fashion, 2 wire has always been good enough, especially once the lead resistance has been nulled out of the readings. I like to only really buy what I need, but then again, I'm not in the same position of a lot of friends here who are single, I have to keep SWMBO happy as well
Spec is right, I am trying to make money shifting these QUAD amps... and this µohm-meter at 1,500 Euros costs quite a bit more than my car. The car I get a lot of use and benefit from, every day, but a micro-ohmmeter not really.
However I am not quite at the other extreme like Spec is, having tp make do with basic DMM, because I have no wife and kids to feed and negotiate with.
If I only bought what I strictly needed, I would not have 45 scopes, literally, I guess....
So in my case the aim is in between those 2 extremes : a decent '90s half width VFD bench meter with 4W ohms and decent accuracy, up to 500 Euros.
So the target is the usual HPAK thingy, it fits my desires and budget just fine.
However it will take a lot of time before I can afford that, so maybe it could be fun to build my own milli-ohmmeter. A constant current source, my Metrix MX56C to read the voltage, and bob's your uncle.
Spec yes you are right I could have used my MX56C handheld meter, because very accurate AND, now you make me think of it.... has TWO decimal places in the low ohms range ! I am pretty sure it does.... can't be bothered to double check, I am still sick. No electroniking for me.
I tried to go to work this morning, didn't go well, boss and colleagues united to force me to go back home. I ordered at 16H30 a doctor to come visit me at my house.... he arrived 30 minute sago at 10PM!!!
Good news is, he doesn't think it's COVID, and my problem with the left ear that makes a strange noise and can't hear squat at all... is most likely very benign, phew !
So that means I should be back in business electroniking away, soon
For now it's still not great, can't stand staring at a computer screen for more than a few minutes, it's tiring... so no ordering components and spending hours on forums for me...