That explains it, it is not the most precise way to measure low ohmic values.
What do you mean by "it", the probe-shorting method, the LoZ, the spec's on that meter's range. or something else?
That explains it, it is not the most precise way to measure low ohmic values.
That explains it, it is not the most precise way to measure low ohmic values.
That is true, but i expect it to be more precise than an order of magnitude.
I have used that method sometimes and often seen silly results [...]
Found a pair of older Fluke probes, maybe TL71. They show 0.080 ohms, using the same method [...] Tried to measure the TL175 probes touching between them at different points, the minimum is 0.401ohms somewhere around the indent of the tip [...]
And the results: red TL71+black TL175=0.51 ohm, black TL171+red TL175=0.26 ohm.
At first sight, black TL175 is the worse of the two, but the red one is not too good either.
Moving the strain relief part of the probes i got the the minimum of 0.065 ohm, but the culprit seems to be the black one. There is no visible damage on outside.
I need some time to prepare a constant current source and all that precise stuff, but will be done eventually. Will post updates then.
[...] There are many choices from Probe Master, Pomona, SKS-Hirschmann and even Brymen. I saw on ebay gold-coated Brymen probes with silicone wire for around 18USD.
Those eBay Brymen PP-BM10A probes with screw-on banana shrouds are sold by Frankie from 99cent-hobbies (he used to source many items from Asian markets for eevblog members). They seem to be well-received there, e,g, see here.
99cent is not Frankie anymore, he left Hong Kong. The stuff sold still looks to be good.
Yes, but it's the same eBay account (18 years old) and same stuff, and still 100% positive feedback since he left, so I wouldn't worry about who he has running the business now.
As Frankie explained when he left, it is his brother and he do not have the same technical knowledge.
But no one recommend the eBay seller as a source of "technical knowledge". Many trustworthy sellers have very limited technical knowledge, e.g. this is true of most all sellers of Li-ion cells, and most all sellers (and many manufacturers) of Li-ion chargers.