Fnirsi HRM-10 Internal Resistance Tester

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.

Code: FNUK22
Time: July 11th - July 24th

[GZQCArtwork]

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.!?
These meters use Twin wires because the extra wire is a sense wire, to remove the resistance of the probe cables.!
What am I missing.?

[MikeB_UK]

There is a YT video where this Fnirsi HRM-10 gets tested comparing to a Fluke BT521 (approx 40 UKP vs 4000 UKP). Using the standard out of the box setup the Fnirsi tester agreed to within 0.05 volt and 0.5 milliohm of the Fluke, which is very impressive for the price.

[stub]

When are going to do some more projects with microcontrollers' ?

[firasgh]

شكرا على الفيديو لقد تمنيت أن ارى ذلك من زمن

[tonyh]

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.

[CauOngTroi]

A Chinese meter manufacturer. They have released a product that measures battery internal resistance quite standardly and possibly other types of electronic components on the circuit directly. And I also had some good experiences with this watch

[GadgetReviewVideos]

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.

[EsotericArctos]

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.

[firasgh]

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

[RichardSloan]

I haven't read the comments yet I'm thinking the copper tube might as well been left out

[kapegede]

How about testing inductors and capacitors in comparision to a Mesr-100 ESR meter?

[vink]

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.

[johnch.]

las especificaciones del producto estan atras en la caja.

[flagpoleeip]

The voltage reading 18650 Li-ion was exactly the same on both meters??? why did you say it wasn't?

[ErrorMessageNotFound]

Do they have alternative probes available ?

[vytautasslenderis]

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 :)

[josepeixoto]

how about the devices' precision?? so many digits, and you don't even know the voltage, it read 3.30 and then 3.32 V on 2 tries of the same;
on another 2 tries you got near 3.40 and near 3.38 volts; so, the 2 significant digits on the reight have NO meaning at all ?
i doubted that 5 digit thing as soon as i saw it.

[SuperBoobaloo]

Could this serve as a general-purpose milliohm meter? For testing cable resistance and the like.

[waschbaers_werkstatt]

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 think i get one

[manchegocheese]

This unit needs more work. It would be far more useful as a battery tester if it included an editable database (text file) of generic battery types. Claimed accuracy is +/- 0.5% for voltage and resistance.