Author Topic: FNIRSI HRM-10 Battery Internal Resistance Tester [ & Milli-Ohmmeter] Review  (Read 2503 times)

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Offline Paul TTopic starter

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I am starting a topic on the HRM-10 Internal Resistance Tester - not currently one under Test Equipment.  There was a brief discussion in Beginners to briefly discuss what the readings mean.

I just posted a review at: KeepOnTesting, please check it out.

As I said in my review, and on the other sub-forum, I felt the usefulness of this device to check the condition of old batteries was poor.  I do capacity tests on rechargeable cells all the time, and the information it provides is much more useful, including the IR test it does (which needs done several times due to poor repeatability).

However, I found this to be an excellent device for accurately measuring milliohms up to 200 ohms.  I haven't seen a good 4-wire resistance tester for about $35 before.

I wondered if anyone is using this meter for anything in particular, and how well it works for what you are doing?  Has anyone made their own cable for the product?  :popcorn:
Electronics always a core hobby. Sometimes I blog at KeepOnTesting.
 
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Offline ptluis

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I am starting a topic on the HRM-10 Internal Resistance Tester - not currently one under Test Equipment.  There was a brief discussion in Beginners to briefly discuss what the readings mean.

I just posted a review at: KeepOnTesting, please check it out.

As I said in my review, and on the other sub-forum, I felt the usefulness of this device to check the condition of old batteries was poor.  I do capacity tests on rechargeable cells all the time, and the information it provides is much more useful, including the IR test it does (which needs done several times due to poor repeatability).

However, I found this to be an excellent device for accurately measuring milliohms up to 200 ohms.  I haven't seen a good 4-wire resistance tester for about $35 before.

I wondered if anyone is using this meter for anything in particular, and how well it works for what you are doing?  Has anyone made their own cable for the product?  :popcorn:

 I'm using one with firmware V0.4, although on their site there's only V0.3 available to download.
i use it to test battery cells in packs, and it's working nicely, it shows consistent results within specs. What I don't like is the short cable, and the clips come a little offset, but i will build some extra probs when i have some free time.
 

Offline TheDefpom

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Fnirsi have sent one to me to review, it should arrive very soon, so watch out for a review on my channel within the next couple of weeks, if I remember I will post it here too.
Cheers Scott

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Offline DaneLaw

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Also got one, first impressions are mediocre.
Purchased it on sale from a store on Aliexpress (36$ delivered incl.25%EUVAT)

Dont like the connector, there is likely a reason why they tend to use specialty connectors where some seem to originate from aviation on cheap resistance/milliohm meters.

Is it a GX12-4pin on HRM-10?

Trying to find heads & tails of the different models.

* Yaorea 1030+ USB-A 4pin
* Yaorea 1035+ XS10 4pin?
* RC3563 GX12 4 pin?
* HRM-10 GX12 4pin?
* Yaorea 2050 USB-A 4pin

Correct?
 
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Offline ptluis

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Also got one, first impressions are mediocre.
Purchased it on sale from a store on Aliexpress (36$ delivered incl.25%EUVAT)

Dont like the connector, there is likely a reason why they tend to use specialty connectors where some seem to originate from aviation on cheap resistance/milliohm meters.

Is it a GX12-4pin on HRM-10?

Trying to find heads & tails of the different models.

* Yaorea 1030+ USB-A 4pin
* Yaorea 1035+ XS10 4pin?
* RC3563 GX12 4 pin?
* HRM-10 GX12 4pin?
* Yaorea 2050 USB-A 4pin

Correct?

Why you say yours is mediocre? in what scenario's? I find mine really competent in diagnosing lithium batteries health, it's easy to find a failing or bad cell in a pack. The cable is really not good, and the clip solution is not adequate for bare cells, the pin type is better but the device reads fast and comparing to hioki BT3563A and BT3554 it does not disapoint.
 
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Offline DaneLaw

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Also got one, first impressions are mediocre.
Purchased it on sale from a store on Aliexpress (36$ delivered incl.25%EUVAT)

Dont like the connector, there is likely a reason why they tend to use specialty connectors where some seem to originate from aviation on cheap resistance/milliohm meters.

Is it a GX12-4pin on HRM-10?

Trying to find heads & tails of the different models.

* Yaorea 1030+ USB-A 4pin
* Yaorea 1035+ XS10 4pin?
* RC3563 GX12 4 pin?
* HRM-10 GX12 4pin?
* Yaorea 2050 USB-A 4pin

Correct?

Why you say yours is mediocre? in what scenario's? I find mine really competent in diagnosing lithium batteries health, it's easy to find a failing or bad cell in a pack. The cable is really not good, and the clip solution is not adequate for bare cells, the pin type is better but the device reads fast and comparing to hioki BT3563A and BT3554 it does not disapoint.

ITs still early days, but there was a few things that didn't appeal..
The lack of silicone wires for its 4-wire inner measurement wires, which we even see on 5 dollar 4-wire test grippers... it makes the cable rigid and will have a will of its own when you try to measure, also very little spacing from one grapper to the next if you wanna center a battery, and poke it from each side.. you have very little play, - as mentioned also don't like the screw-on connector that you need to align and carefully see where the small grease is with some light to align it correctly, it makes the product bulky, as you tend to leave the connector on, and it's cumbersome to change if you wanna make your own test leads, and the fact that it only exists with grappers,  -  far from ideal in most of my usecases, not least on batteries and if they wanna use this bulky connector with such a rigid short cable. put the socket in the bottom.

My unit arrived with v0.4 but hopefully, it can be  suited up with other test leads, as my readings (at times) left a lot to be desired, but it's far from ideal to use grappers on fx 18650, even though you space them.
Was the socket-identification above of the different models correct, and if so, same pinout as fx RC3563?.
« Last Edit: October 20, 2024, 04:43:05 pm by DaneLaw »
 

Offline Paul TTopic starter

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I have firmware 0.4 too. As received.  I only have three small issues with the software.

#1 The - sign for negative readings is an _ underscore, instead of being centered. Easy to miss it.

#2 cannot remove lines or or delete the record data on the device.

#3 adjusting the time is backwards. The down arrow is used to increase the value.
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Offline Paul TTopic starter

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My opinion of the FNIRSI is improving after successfully calibrating it, as described in my review blog.  I wished more devices allowed the user to do this.

Electronics always a core hobby. Sometimes I blog at KeepOnTesting.
 

Online TERRA Operative

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I have done a review on one of these on my Youtube channel, seems lots of people are getting them recently.
It seems to give readings that roughly agree with my HP 4338B milliohm meter.
After cal it was much better too.

I found a few small things that I didn't like, but mostly down to things in the UI which is firmware fixable.
Where does all this test equipment keep coming from?!?

https://www.youtube.com/NearFarMedia/
 

Offline DaneLaw

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The only other two milliohm meters I got, are a YR2050 (DC) and a 20$ YR1030+ (AC) mainly to get the USB-probes for the YR2050 as that unit comes bundled with grappers..

copper wire.



« Last Edit: October 21, 2024, 12:13:29 am by DaneLaw »
 

Offline Paul TTopic starter

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It's not too difficult to make a small adapter board for use with other connectors. 
A 4-wire connection can be extended to other attachments - without any penalty, as long as the connections are reliable.

Here's an example of a round-trip cable tester setup.  It's meant to determine the total resistance a cable has on the power wires.  The lower the resistance, the better ampacity.

My previous milli-ohmmeter adapted to 4P header and these various attachments go to USB-A, USB-Mini, USB-Micro, USB-C.  Also, I made shunts for far-end termination from good quality connectors.  The resistance of the connectors at the ends of the cables are present in the product usage, so I feel it's valid to capture the entire path the way I do.

The key to adapting the FNIRSI to these components was 2x5 headers that the Kelvin clips can grab onto.  5 rows handle the pressure of the jaws better than just a few.  They are all in parallel. The V+I+V-I- labels match up with my previous equipment force and sense connections.
« Last Edit: October 25, 2024, 02:04:25 pm by Paul T »
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Offline DaneLaw

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Looks like there is a new bundled version.

with also probes and cellmount at an added cost of around +18$.
The HRM10 socket is as debated, just a standard GX12-4pin.
So you could likely also get some of the accessories for other 4wire-battery-testers using that connector, just double check the pin-out matches.



« Last Edit: October 29, 2024, 08:23:48 pm by DaneLaw »
 
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Offline Paul TTopic starter

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This is a nice kit, in theory.  However, the length of the wires between the tester pens to the junction is too short, barely the length of the pen itself.  If you want to aim the pens at opposing ends of the battery so that the probes are perpendicular to the face, it can't be done.  :--
Electronics always a core hobby. Sometimes I blog at KeepOnTesting.
 

Offline DaneLaw

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This is a nice kit, in theory.  However, the length of the wires between the tester pens to the junction is too short, barely the length of the pen itself.  If you want to aim the pens at opposing ends of the battery so that the probes are perpendicular to the face, it can't be done.  :--
Many of these graphical promo-display pictures, ain't 100% representative of the actual product, sizewise, they are orchestrated to make it look neat as can also be seen on the dual 90-degree angle of the cable on the probes., so hopefully they will fit their intended use-case, but then again the jaws kontra cable length are actually very close to the pictured dimension above.

These accessories would come as stand-alone spares and be purchasable for users who already purchased the HRM-10 with just jaws, not sure about the price, but the seller that sold me the HRM10 would reach out when he got them as spares.
Been testing the HRM10 on various cable-resistance, and the readings are very close to the values on YR2050 (DC-based)
 
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Offline TheDefpom

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I edited my review video for this today and uploaded it to YouTube (currently unlisted) will go public on Wednesday next week.
Cheers Scott

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Offline mawyatt

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Anyone measured the actual test current level from the HRM-10?

How does this compare with the Yaorea 1030, 1035 and 2050?

Best,
Curiosity killed the cat, also depleted my wallet!
~Wyatt Labs by Mike~
 

Offline Paul TTopic starter

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Here's what I get when testing.  The resistance is reported on the HRM-10, the current on a ZOYI ZT-5566.

R (ohm)   I (mA)
0.0305   23.5 (multimeter in AC A)
2.168   2.45 (multimeter in AC mA)
50.69   0.034 (multimeter in mA, add 48.5 ohm resistor)

Double-Log chart attached.
Electronics always a core hobby. Sometimes I blog at KeepOnTesting.
 
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Offline DaneLaw

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Re: FNIRSI HRM-10 Battery Internal Resistance Tester [ & Milli-Ohmmeter] Review
« Reply #17 on: November 11, 2024, 11:09:03 pm »
...
These accessories would come as stand-alone spares and be purchasable for users who already purchased the HRM-10 with just jaws, not sure about the price, but the seller that sold me the HRM10 would reach out when he got them as spares.
...
Will likely also pop up at many other stores, but the mentioned source above got back with this listing.
https://aliexpress.com/item/1005007997236597.html?
« Last Edit: November 11, 2024, 11:13:22 pm by DaneLaw »
 
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Offline bte

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Re: FNIRSI HRM-10 Battery Internal Resistance Tester [ & Milli-Ohmmeter] Review
« Reply #18 on: November 21, 2024, 08:01:01 pm »
Anyone measured the actual test current level from the HRM-10?
Best,

In this review some voltage waveforms are shown:

https://youtu.be/8XsSwTGnwEk?t=486

It is not exactly an answer to your question, but it might provide some insight as to how the measurements are made.
 


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