Fnirsi HRM-10 Internal Resistance Tester
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- Опубліковано 10 лип 2024
- A precision internal resistance and voltage tester with 4-wire probes and an easy-to-read LCD display.
The voltage measurement has 4 decimal places of precision and the resistance measurement has a precision of 0.01 milliohms.
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Code: FNUK22
Time: July 11th - July 24th
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A simple solution is to use 2 small magnets, eg. 5x5x3mm, with insulation between them, attached to a battery terminal. Then clip the Kelvin clips across the magnets. The bigger the magnets the greater the clamping force to the battery terminal, minimising resistance (or more importantly variation in contact resistance) during the measurements. Obviously the limit is how wide the Kelvin clips will open and the size of the battery terminal. This arrangement allows a hands-off measurement eliminating variations from varying hand pressure.
I will NEVER buy something with scraped numbers off components, that means I can't repair it witch means I don't own it
I have seen budget oscilloscopes from the same company. They are okay for general use, but found them quite inaccurate with measurements, sometimes 10 percent or more out on the measurements. It looks like this device may be slightly more accurate than the oscilloscopes, but maybe still a little out.
Why did you insert those copper tubes? No need. Simply close the probes, the short length of the tips will have almost no effect. You still inserted another piece of metal, which may have even more effect on the readings, one more contact point. "Solving" one problem by creating another :)
An 18650 battery holder might be easiest - you could mount it on a wooden board and connect the probes (or even buy a four-pin connector and wire it directly to the battery holder) so measuring a bunch of cells is as easy as putting them in and out of the battery holder.
Would a magnet work? Solder a block to the magnet and the probes grab the block. Attach magnet to the end of the cell.
When are going to do some more projects with microcontrollers' ?
What was that small scope you used?
Do they have alternative probes available ?
you could of used a small peice of nickel strip spot welded to the 18650
Hmmmm, odd question, that tube is metal, and therefore just shorting the probes, so why not just touch the cell contacts with the jaws together.!?
شكرا على الفيديو لقد تمنيت أن ارى ذلك من زمن
one solution that comes to mind is putting an insulator between the clamps that keep them separated and then taking the ends and touching them to the end of the battery.
ماهو اسم الجهاز الأخر ورقم الموديل . ملاحظة : يجب على مصنعين البطاريات أن يكون النحاس الصافي المغلفن هو ونهاية التوصيلات حتى ةان كان على شكل برغي ويفضل صولية بفتحة للربط السهل مع بطاريه أخرى
Very nice, i dont think you can't make super accurate messurements, simply the fact how you messure (steel bolt +100%) i think its not the actual value shown on screen, more the fact if you messure the same way to all cells, so can compare them, to a degree. okay you should avoid steel bolts and nickel plated steel strips.
I haven't read the comments yet I'm thinking the copper tube might as well been left out
How about testing inductors and capacitors in comparision to a Mesr-100 ESR meter?
The voltage reading 18650 Li-ion was exactly the same on both meters??? why did you say it wasn't?