During my testing of the HRM-10 the voltage was very accurate. The only thing they need to change in the manual is the 0V-100V. It actually cuts off at 50mv and wont measure lower. Not a big deal since it’s not a volt meter and was accurate within spec compared to my other internal resistance testers. I actually like it.
I would like to see “how low we can go” on both voltage and resistance and still be accurate. I partly wonder how much the impedance of the source affects the minimum amount of voltage measured. I would assume the source needs some sort of conductive response, otherwise the device thinks it’s finding an open circuit.
Thanks for your, as usual, thorough review. I think I'll get one to explore its low resistance measuring capability. Your repair videos of Bertan HV and electrophoresis machines gave me ideas and needed guidance to solve my devices issues. I hope you find another instrument that you'd like to share your repair or building process.
The HRM-10 is quite a contrast to how badly their oscilloscope performed. I’ve got the GC-01 Geiger counter, and it isn’t too bad. The GC-01 appears to use a Russian gas tube. It is hard to mess up a Geiger Counter as long as the tube voltage is set correctly for appropriate sensitivity, all you’ve got to do is to count pulses. The GC-01 gives count rate as well as converting into several common dose rate values. I leave a GC-01 running for curiosity’s sake. I can tell when there’s solar flare because the alarm will trip more often when I have it set just above normal background count rate.
@@RowanHawkins Nickel is a better conductor than magnetic steel. So, if magnetic steel is used, no, a magnet won't work, as nickel is also ferromagnetic.
There is a better option for flat-top cells. I use Kelvin dual-prong probes. Each pen has two sharp, gold-plated pogo pins that are closely spaced. At the other end is a fixed-spacing pair of banana plugs for red and black. All I have to do is clip the FNIRISI alligators in the open position to these two plugs. They fit very well in the pass-thru receptacle side of the banana plug end. I'm sure you have the same sort of probes somewhere.
Very interesting. Question: There is a Rel function (button) for cable calibration. I think you didn't use it for resistor measurement. 4-wire method is very exact.
I suspect the center blue rectangle in the center of the back contains your key for disassembly. If you press on the label, do you feel a soft spot? Usually a label doubles as an anti-tamper device. Another trick to finding screws without peeling feet is a small smooth magnet, put it nearby and it will be attracted to any screws.
FNIRSI makes their cabinets really difficult to open. I have the little Geiger counter in what appears to be a yellow version of this case. To get it open, you have to remove four screws in the corners, peel off the rubber bumper, and it looks like there is also a screw under the sticker on the back. I decided to put my desire to do a teardown aside because it didn’t appear it would be possible to open the unit without destroying the sticker and losing the warranty.
what is the lowest tolerances it will do on the ohm, is it down to 10 micro ohm res? If i recall, ain't it through the screen you enter on these modern Fnirsi LCD meters. you peel of the plastic front to access screws underneath but it ain't as straight forward as screws in the back. thx for the vid.. user calibration....good to see.
@@guateque1718 It is a very solid meter but those pogo stick probes are something a blessing and a curse, it would be great if it had both clips and pogo sticks. In my country the YR is more expensive than the FNIRSI.
During my testing of the HRM-10 the voltage was very accurate. The only thing they need to change in the manual is the 0V-100V. It actually cuts off at 50mv and wont measure lower. Not a big deal since it’s not a volt meter and was accurate within spec compared to my other internal resistance testers. I actually like it.
I would like to see “how low we can go” on both voltage and resistance and still be accurate. I partly wonder how much the impedance of the source affects the minimum amount of voltage measured. I would assume the source needs some sort of conductive response, otherwise the device thinks it’s finding an open circuit.
Thanks for your, as usual, thorough review. I think I'll get one to explore its low resistance measuring capability.
Your repair videos of Bertan HV and electrophoresis machines gave me ideas and needed guidance to solve my devices issues. I hope you find another instrument that you'd like to share your repair or building process.
Thank you. I have been disappointed by fnirsi several times but this tester sure seems to do what it says it can do.
The HRM-10 is quite a contrast to how badly their oscilloscope performed. I’ve got the GC-01 Geiger counter, and it isn’t too bad. The GC-01 appears to use a Russian gas tube. It is hard to mess up a Geiger Counter as long as the tube voltage is set correctly for appropriate sensitivity, all you’ve got to do is to count pulses. The GC-01 gives count rate as well as converting into several common dose rate values. I leave a GC-01 running for curiosity’s sake. I can tell when there’s solar flare because the alarm will trip more often when I have it set just above normal background count rate.
Those can also me used to measure very small resistances, for example to check nickel strips and make sure they're not nickel-plated steel.
Wouldn't a magnet be a faster test? Using non-magnetic steel probably costs more than just using nickel.
@@RowanHawkins Nickel is a better conductor than magnetic steel. So, if magnetic steel is used, no, a magnet won't work, as nickel is also ferromagnetic.
There is a better option for flat-top cells. I use Kelvin dual-prong probes. Each pen has two sharp, gold-plated pogo pins that are closely spaced. At the other end is a fixed-spacing pair of banana plugs for red and black. All I have to do is clip the FNIRISI alligators in the open position to these two plugs. They fit very well in the pass-thru receptacle side of the banana plug end. I'm sure you have the same sort of probes somewhere.
Nice video thank you.
thank you very much It was a good video😊
Very interesting. Question: There is a Rel function (button) for cable calibration. I think you didn't use it for resistor measurement. 4-wire method is very exact.
I am quite happy with my HRM-10. I have had it for several months and rely on it regularly. Thanks, Kerry, for confirming my results! Cheers!
I suspect the center blue rectangle in the center of the back contains your key for disassembly. If you press on the label, do you feel a soft spot? Usually a label doubles as an anti-tamper device. Another trick to finding screws without peeling feet is a small smooth magnet, put it nearby and it will be attracted to any screws.
I've seen in another video that you can actually pop off the front panel with a spudger and then underneath you see screws in the four corners.
@@Peter-rt3tuThat makes a lot of sense. Nice way to conceal screws, almost like a typical boot does.
FNIRSI makes their cabinets really difficult to open. I have the little Geiger counter in what appears to be a yellow version of this case. To get it open, you have to remove four screws in the corners, peel off the rubber bumper, and it looks like there is also a screw under the sticker on the back. I decided to put my desire to do a teardown aside because it didn’t appear it would be possible to open the unit without destroying the sticker and losing the warranty.
what is the lowest tolerances it will do on the ohm, is it down to 10 micro ohm res?
If i recall, ain't it through the screen you enter on these modern Fnirsi LCD meters. you peel of the plastic front to access screws underneath but it ain't as straight forward as screws in the back.
thx for the vid..
user calibration....good to see.
OMG you get them gratis, I get jealous!
Very cool. As I asked a question to myself... You answered it! You read my mind.
Mine turns on but doesn’t work/ measure
I wonder how effective this would be evaluating the goodness of a dc power supply.
I was so upset when I saw that the FNIRSI hit the market, because I've got the YR1035+
What's wrong with the YR?
@@guateque1718 The screen and the probes 😂
@@ciprianwinerElectronicManiac I have the YR on my list. Hmmm might have to look at other options.
@@guateque1718 It is a very solid meter but those pogo stick probes are something a blessing and a curse, it would be great if it had both clips and pogo sticks. In my country the YR is more expensive than the FNIRSI.
@@ciprianwinerElectronicManiac it's the opposite here. Fnirsi is a premium import brand here.
what is this and why would i need it .
Well done review, Metrology Masta' ! Thanks Kerry, always enjoy your explorations. - JRH
Can be used for capacitor internal resistance measurement too?
Yes. The limitation is that the measurement frequency is fixed.