Fnirsi HRM-10 internal resistance meter - test and teardown

Testing the HRM-10 internal resistance tester (meter) from Fnirsi. It's intended to measure the internal resistance and the voltage of batteries, but it also seems to be able to measure the ESR of electrolytic capacitors and supercapacitors, and even resistances (resistors) down to sub milliohm values. This is possible thanks to its 4-wire Kelvin probes.
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[@noakeswalker]

I built a 50KHz Esr meter, and a constant current adaptor for my Fluke multimeter for simple 4-wire milliohm measurements. But here is a device that will do both with 100x better resolution, AND it will do battery internal R as well ! I like your thinking about the phase measurements this could be doing, DGW. Thanks for showing us this thingy, it's a _good_ thingy.

[@jonlitchfield8888]

Cld u plse direct me to the circuit diag u used for the esr meter thx

[@Snowsea-gs4wu]

Hi Diode, thanks for the video!

[@d.k.9406]

Danke! Thanks! The comparison of all this types on one gadget gave me a good reference. Very helpful.

[@DiodeGoneWild]

Thank you for your support ;)

[@juanferrer1213]

Also got mine a week ago, here in Cdmx Mexico. It was a pretty nice surprise see your analysis. Saludos

[@WagTsX]

another cool device from Fnirsi. I would buy it just for checking smaller battery quality, but I already have a lead-acid (12v) battery analyzer that does check internal resistance using the same 2-wire per probe method, and when I need to work with batteries nowadays it's because i'm working with an UPS that use 12v VRLA batteries. I beg for a feature like this to be built in multimeters from Fnirsi, it'll definately be handy.

[@sonjakavalut]

Wich tester do you use for checking ups batteries? Thank you. Best regards.

[@Tegelane5]

@@sonjakavalut Just (and only) for batteries I would reccomend Kingbolen BM-550, it cost 15 euros from AliExpress. It is meant for lead batteries but can also read 4,2V Lithium batteries. For average user it's even better as it analyses battery voltage and can assume through resistance starting current. It runs on test battery voltage so it has no internal battery which could run down.

[@lorenzorentniop717]

Hey you could try meshuring the R-ds on of MOSFETs!

[@piconano]

I like it. I have their radiation meter and it works great. This meter is a lot nicer than my old one panel type that measures only resistance and only up to 2 Ohms. I used mine to make custom high current shunts for my projects. Thanks for the video. I'm ordering one from your AliSlow link.

[@juhaszpeter4796]

I have one too, luckily I managed to get the older version which still works well, the newer editions are already being sold at a reduced price with worse parts. Fortunately, my SG-004A was also the good edition. I don't know when this will be dumbed down. Unfortunately, I have 9 different Fnirsi products and I am satisfied with only 3, the other 6 were an unnecessary waste of money.👍

[@piconano]

@@juhaszpeter4796 Thanks for the heads up. My Hantek scope has a function gen so I never bothered with any of them. They're banking on the Battle Star Galactica theme look to sell same things as others.

[@LawpickingLocksmith]

Got mine a few weeks ago. After setting time and date I also tested capacitors. It is then a 3 in one instruments as it keeps a log of tested units. First time I think back to the year 1985 when I spent 2 months of wages on a Fluke 8024B just to measure true RMS. This one had the famous Siemens ranges for low resistance. The Fluke had the shortest lifespan of all multimeters I ever bought out of around 50. Thanks Fnirsi, finally some good value for money.

[@Basement-Science]

I know this is kind-of an industry standard testing method, but: I'd like to see some comparisons to an actual DC load test. Measure the open circuit voltage and then the voltage with a 10 ohm load or so, and calculate the internal resistance that way after 2s for example. While the capacitance of the batteries may be insiginifcant at 1kHz, any chemical short-term effects may be very significant depending on the battery type.

[@dieseltinus6680]

So with this one you can find a short circuit on a printed circuit board. Handy.

[@guateque1718]

That's the only reason I want this tester. I want to be able to find shorts on boards.

[@ПавелД-к4ы]

Мирон 63 прибор лучше будет.

[@dred05m61]

My compliments, Dany K 📟 This channel gets better everyday on KZbin May God reward you for you reviews, product safety and last but not least: analysis 📲

[@sebastian19745]

Great tool. I wonder, it can be used to find a short circuit on a PCB?

[@dino6627]

Thanks for great review. I was looking for a low-ohm meter, this looks good and have ordered one. I was unsure before and I think they missed out on some sales by focusing on the battery internal resistance testing. It would be even better with a separate capacitor testing mode, perhaps possible through a firmware update.

[@Azaakiel20]

Very nice quality product it seems. Nicely done probes. How good are tantalum capacitors?? Test panasonic batteries and panasonic 18650 and 21700 :)

[@amersa89]

Heyy Daniel ,, could you please explain to us, how 555chip gives us negative voltages, i did not get it, we can by using 555chip make voltage multiplier or Generating a negative voltage using diodes and capacitors ... i did not understand this. thaaaaanks.

[@Gengh13]

That's pretty good, are those big HV electrolytic caps used for coupling the generator so that it can send the signal without much attenuation and can work in batteries?

[@MrSlehofer]

Have you also tried measuring internal resistances of power inductors or SMPS transformers?

[@mrxllone]

How does the two-wires-per-probe measurement work? Why is it needed?

[@pa4tim]

I use an old GR bridge, an LCR meter or a DIY ESR meter for battery resistance. I modded the ESR meter because I never use it. II made a 2uF2 MKT in the frontend so I can measure AC coupled. The GR bridge is AC coupled and if I use one of my LCR meters, I use a series MKT (I zero the meter with that cap or first measure it and then subtract the ESR. ) That Frinsi is in my opinion just an ESR meter with added voltmeter and made in such a way that it can handle DC at the input. Probably measuring voltage straight at the input and the ERS AC coupled. Could be handy if you do not have a bridge, LCR meter or ESR meter. However, many simple ESR meters do not measure the ESR but the impedance. Those are not usable for batteries (in fact, they are not usable for anything 🙂 )If you have a bridge, there is a way to measure the complex impedance of a battery. This gives you de Rin and the capacitance. Every healthy battery is pure ohms. If the degrade they become capacitieve. A real bad one in the 10's of nF range. The real expensive battery analysers do it like that (You can also use a VNA but it must be AC coupled for safety.

[@tajtrlik1111]

Opäť ti chcem poďakovať za pekné videjko, na tomto testeri je šikovné, že sa dá použiť aj ako miliohmmeter pre meranie rezistorov s malým odporom.

[@Hhtfvhrcbgrejkkjhffvbhb]

Very good for show details. Battery socket not good by company.

[@Z-Ack]

With your style of humor and attitude along with the lifestyle ive picked up on your youtube videos, you gotta be puffing on that ole green shisha at least every once in a while.

[@ats89117]

Nice!

[@EasyOne]

nice

[@Mladjasmilic]

Can it work with AC voltage? Please, check if it can be used for ground - neutral resistance test for TT (terra-terra) electrical systems.

[@Yesid_jrh]

Saludos desde Colombia.

[@suomhi]

Catculator 😻

[@LawpickingLocksmith]

we need to name his cat! suggest like nikola, Nikita or shall we use brotislov?

[@_________________404]

Catculator used in Haitian mathematics classes.

[@ruayfe7342]

Big fan of you

[@amirebrahimieftekhari6876]

nice 👌

[@venomf14b34]

when can we see the face to the video ? ive been watching you for a few years now love the voice

[@raffaellu4375]

👏👏👏👏👏👏👏

[@bokexd3173]

based fabia 1.9 sdi enjoyer 💪💪💪💪

[@berndeckenfels]

How do you measure battery resistance anyway - is it the delta for two different discharge currents?

[@dorfschmidt4833]

Yes, you can find a equation online, need two DMMs to measure voltage and current at the same time for two different loads.

[@Mike-gk7qh]

love you

[@splitprissm9339]

These 1,8V lithium "bunker" batteries are great to equip collectible handheld equipment with because they have a reputation of also being leakproof indefinitely and simply not filled with a lot of super corrosive liquid inside. Need to recheck calibration though if it is eg analog multimeters, 1.8V could throw some circuits off calibration. Also, probably NOT the battery to put in if the equipment contains directly heated pencil vacuum tubes :) Honorable mention to zinc carbon batteries also, though - their juice is not quite as aggressive as alkaline when it eventually leaks :)

[@Alexelectricalengineering]

Nice one 😄👍👍

[@KJB-Man]

I'm amazed they made such a good device and put crappy electrolytics inside. It would be a good test to replace them with some IC or Nichicon caps. And then use the unit to test the original ones that were installed in the factory! lol :)

[@ThermalWorld_]

Thanks for this video but I have no trust on those F-NIRSI meters. Try comparison between YR1035 and this one.

[@alexluz7023]

ah car battery at the end.... feeeling better now thx for great review... lets reverse engeneire it with schematic of course lol

[@pault6533]

I want to make my own cable. What is the connector type?

[@Joetechlincolns]

Looks alot like 4-pin cb micrpohone connector. But I don't have the tester in front of me to compare.

[@pault6533]

How about Omilex GX12-4

[@Joetechlincolns]

@@pault6533 It sure looks like it

[@edgeeffect]

Getting review products would be one of the best things about having a KZbin channel... if you get to keep them after the review.

[@snik2pl]

Higher capaticy usualy have higher resistance and lower peak discharge current

[@kyoudaiken]

I hope the RTC chip does not contain a battery...

[@pvc988]

It's hit and miss with Fnirsi. Sometimes you get pretty cool product like this one and somtimes not so much.

[@Robbedoes2]

Internal resistance will increase over time on some battery technologies because of a passivation layer. This is removed by cycling it or pulling some power. Those lithium AA batteries are low power high capacity ones.

[@Josh-b3c]

Do you also watch my purchase history like Google does No I literally just ordered this not even an hour ago

[@geekrulz1]

Measuring small resistance while TOUCHING the probes realy?

[@DiodeGoneWild]

Yes. A very high resistance (a human) added in parallel to a very low resistance has almost no effect.

[@geekrulz1]

@@DiodeGoneWild 😂

[@dvhx]

Claims to be an educational electrical engineering youtube channel, but uses conductive pointer at 10:48 on a device with battery still inside. You are making bad example. Shame.

[@skelafeti]

this chinese company has been flooding the chit out of their product to youtube reviewers. that alone says something about their products. in case you don't get it, I'll never buy their gear.

[@worroSfOretsevraH]

If not a schematic, but at least a block diagram would have been nice. A bit of reverse engineering.

[@sveu3pm]

you need to teardown some pagers