🔴 FNIRSI HRM-10 Battery Internal Resistance Meter Review - No.1297

[@rogerknapman1260]

I have one of these units and I like it. My application is testing UPS battery packs without removing them from the unit and disassembling them. Most methods of testing AGM batteries require breaking them down to their 12V packs. I can test 24V, 48V, and 72V packs in most UPS units by just removing the front panel cover and disconnecting the main battery lead. Jam these probes in the connector and within seconds getting a reading. For instance i have three APC units with 24V internal batteries comprised of two 12V 9AH batteries. 44mOhm, 70mOhm, and 94mOhm. I also have two Liebert GXT3 units with 48V packs comprised by smaller 12V 5Ah batteries: 160mOhm & 250mOhm. I doubt 250mOhm will support the 500VA rating of the and will crash soon after the power goes out. Once you get a baseline on what newly installed packs or what constituent batteries should measure, then I can maybe set the three "binning" presets. The 4-pin aviation plug is actually easy to obtain. I have yet to build my own custom cables but the supplied croc-tips (alligator) clips aren't good for large or small connections.

[@TorchHacker]

A pogo pin lead for the FNIRSI HRM-10 would be awesome. I'm using the HRM-10 for measuring the internal resistance of Lithium batteries like 18650/21700 etc and the included clips are awkward to use.

[@IanScottJohnston]

The button/pin hole could be the STM32 boot0 or boot1 mode option, same as the header links on your BluePill STM32 boards

[@TorchHacker]

FNIRSI now have two new attachments. One does AAA to 18650 cells. Another has pogo probes.

[@TheDefpom]

@@TorchHacker yes I’ve seen that, I show it in the video 😉

[@stoptheirlies]

would it be a tad brighter with the plastic protective cover removed?

[@garthhowe297]

Amazing that such a low cost piece of gear has that calibration built in. It's unfortunate they chose that kind of test lead connection.

[@p.j.wilkins1321]

Glad I don't have OCD - leaving the screen cover on the whole time is probably going to send someone over the edge.

[@TheDefpom]

@@p.j.wilkins1321 I ALMOST peeled it off… almost.

[@AnnaVannieuwenhuyse]

I've taken on one of DiodeGoneWild's habits: removing the little tab but leaving on the plastic sheet. It does last surprisingly long.

[@pault6533]

Instead of 0 for impedance greater than 200 ohms, it should report over limit. Showing zero is very misleading and can lead to improper conclusions.

[@Chris_Grossman]

The test lead connector is the issue for me. It should be four 0.75 inch spaced center banana jacks. I have a potential use where the kelvin clip would be useful for positive, and a pogo pin probe for the negative. I also have a kelvin battery fixture. All my Kelvin probes and fixtures have banana plugs. If it had the four banana jacks I would buy it.

[@simontay4851]

If there is room you could drill holes in the case for banana sockets. I also don't like the custom connector and that it is at the top. There should be 4 banana sockets on the front at the bottom, not the top.

[@rogerknapman1260]

I bought the 4 pin aviation connectors. Cheap and easy to find on Amazon. Will build custom leads for each of my applications.

[@simonbaxter8001]

The resistance (ESR) is the difference between off load and on load. At 8:42 the voltage it reads momentarily is the off load voltage and it obviously goes to zero volts under load. i.e. battery = buggered!

[@pault6533]

This meter does not use a load. It uses AC to measure pure electric impedance, without any provision to capture the ionic resistance portion.

[@JAKOB1977]

You find the firmware version in. "factory default" Im at 62% brightness, and that is more than enough for my usecases [FW 0.4] but its likely the studio light that is taking its toe and why it seem dimm. On my unit, Its only in time-settings you have opposite dialing.. all other seem to be right side up,, also sorting., Doesn't look like you can sort passive components like resistors... as it will say fail even if you adjust voltage to 0.. Its worth noting it is an FW upgradeable product, though latest official listed FW is 0.3 (as far as I can tell) so lower then the FW 0.4 they are shipping with But it does cater a small hope they can optimise the product down the line, though usually they dont. Thx for the vid.

[@GregM]

The max brightness looks like about 60% on the video. I wonder how readable that screen is outside for instance.

[@simontay4851]

TP4056 is a lithium battery charging IC.

[@TheDefpom]

@@simontay4851 thanks, I knew I had seen it used before in other items, couldn’t remember what it was, and couldn’t be bothered looking it up.

[@Hasitier]

Do they sell the accessories separately? I already have the standard HRM 10

[@Taliesen.]

Same here. I went looking and couldn't find them. Can't even find the full kit on their site, just the one I bought.

[@TheDefpom]

@@Taliesen. look on AliExpress, I saw the full kit there

[@Taliesen.]

@@TheDefpom The full kit with the meter is there, but I haven't found just the additional probes separately.

[@TheDefpom]

@ if you do then let me know, I want them too.

[@rogerknapman1260]

@@TheDefpom Google "Precisions USB 4 Wire Kelvin Clip Battery Resistance Tester Probe Plastic Battery Internal Resistance Test Clip 1-100" the third option.

[@bblod4896]

Internal resistance is futile. You are now one with the Borg. 🤖