Brymen BM786 vs BM869 DC Current
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- เผยแพร่เมื่อ 13 ส.ค. 2023
- The Brymen BM786 vs the BM869 on DC Current.
www.eevblog.com/forum/testgea...
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#ElectronicsCreators #Brymen #multimeter - วิทยาศาสตร์และเทคโนโลยี
One other strange feature that I encountered is that the Brymen 789 (but it might be the same for the 786), when used in mV range, retains the 10 Mohm input impedance, while most meters go high-Z on the mV range. Well, it turns out that I managed to measure pA by abusing the Brymen in the mV range using the 10 Mohm input impedance as current shunt :)
Have the 869s and love it, super accurate
I love my BM869s, but can't they make a meter with a smother selector - one that doesn't take so much force to twist?
I love my EEVBlog 786.
I wonder if the 869 has a refresh coming after a decade on the market.
I haven't heard anything.
We all enjoy a flood of meters. Embarrassed to say I have lost count.
Once you lose count, you better realign
I only have five because I gave one to my brother. 😊
(singing) "heaven.... I'm in heaven.... And my heart beats so...."
My 869 stopped measuring AC within a year. Sent to service under warranty. They couldn't figure out what's wrong and said the meter needs to be shipped to Taiwan for further analysis and I will have to bear the shipping cost as its not covered in warranty. From my country(India), shipping two ways would easily cost more than what this meter is worth. Decided I will just use the rest of the functionality.
Within a month after that, the meter started showing 'InERR' in all the modes and its basically a brick now.
ut181a vs BM869 vs Keysight U1282A vs gossen 27I>>>>>>>>>>>>>>>>>>thank you
Maybe it's a stupid question but, what does the calibration device do to compensate for the internal resistance of the Brymen and that the Brymen shows exactly the same current measurement as the calibration device?
Both Brymen are in a line.
A current travel thru all devices and will be displayed.
For me, burden voltage is an order of magnitude more important than small parts of a percent inaccuracy. Talking of which, Dave - your magic active microcurrent boards. What's the situation?
I have a video on the 2nd channel about this.
I never seem to be able to retain what counts and digits do. Anyone got a link to an explanation?
th-cam.com/video/U4JFeU-o2kc/w-d-xo.html
I should have picked on up when I was in Melbourne for a few days last July. Could have had it shipped to my hotel. I thought about a day trip to Sydney. Why do you build these cities so far apart, just a bit off the bottom corner and doesn't look far on the map but it's 900km. That's the same as London to Inverness! And what's with this having the winter in the middle of summer? It was freezing.
But I see them measuring exactly the same...
Doesn't this just mean that Brymen grew more confident in their products? (or quality control system for that matter)
I mean, the numbers in the manual don't say anything about their actual accuracy as those numbers aren't a calibration.
It's a number regarding how confident Brymen is in the product or it's production procedure, but it's not an actual physical property of the meter as the number is not an actual measurement.
It just makes for a really strange video when you see 2 meters measuring exactly 1,0000 mA and you point to one meter being more accurate than the other.
And there is of course another thing...that 869 (without S) is probably at least 10 years old. So this 869 holds it's accuracy for at least a decade.
Something that 786 still has to proove 😉
if I'm not mistaken, the 869 did show 100.01mA that matched the Keithley & the source while the other one was between 99.99 and 100.00mA
The 869 seems an older design. 9v battery versus AA/AAA's in the 786 if i'm not mistaken. I'm holding out for a replacement of the 869 that follows the newer design and tech elements of the 786, including ditching the 9v battery. If it comes along, then i'll wait to see if Dave takes it up as a blue EEVblog version. That's worth waiting for for me at the moment..🤞
@@GannDolph the 869 is an older design, it's been on the market for over 10 years now.
Thats why I think it's so strange that the 78x serie misses modern features like a pc data interface.
The price difference between a 789 (top model in the 78x series) and 869s series is not a lot, only about €18, yet apparently that is the price for dual display, 500k resolution and pc data link possibility.
Not that much of almost a decade of progress.
To me it always feels that with the 78x series the design has always been held back on purpose to not replace or compete with the 86x series. Especially with not incorporating the data interface.
I believe it's probably therefore also the only 60k count (or 40k count+) meter on the market (certainly with a young design) without data link capabilities (or dual display for that matter), and that says a lot.
@@mrpetit2 interesting, thanks. also makes me worried that any replacement to the 869s will come at a steeper price :(
@@GannDolph That's almost inevitable. Brymen has become hugely popular in the last decade, and for the quality, features and specs the bm869s offers, nothing comes close, not even at double the price if you ask me.
I'm more curious what new features a 869s successor will have. And for that matter also features on what the successor of the Fluke 289 will have (that design is even older, I think it dates back to ~2007 if i'm correct, so 15 years now.
I don't care much for the scope or trending features in datalogging (a pc does better), but I'm curious if they''ll actually incorporate new electrical units to measure, like measuring inductance, or watts, or (milli)amp-hour, (milli)watt-hour etc. With those last two I think multimeters in general are really late, as portable devices and their energy consumption have been really important for 20 years or so now, and there are not much devices that can measure that in high accuracy.
Hey Dave, do you regularly calibrate your test equipment and if so how do you go about doing that?
Not really. Having two meters is enough to see if one has drifted. If both still read the same then almost certainly the cal is fine.
I've been searching for a video of you explaining what is great about the BM786. I assumed you would have made some sort video about what you customized, what's better, etc. But when I search BM786 on your channel, all that comes up is you fixing broken ones, or finding faults. It's almost like you're trying to get people not to buy it. What gives? I'm considering buying one, but would like to know more about what you did!
oh umm as long it's not off by orders of magnitude iiiii think i'll be okay, riiight? :P .. Interesting stuff and all those digits 0.o
💡
KAIWEETS KM601 Smart Digital Multimeter - 10000 Counts True-RMS? Bees knees!!!
No good to me, can't buy Brymen 869 here down under. Even if they sell it, some retailer is going to add another 50% markup and scam us anyways.
Doesn't TME ship to Australia?
@@mrpetit2 they prolly do, add 10% tax and ~$50 shipping and then convert that to A$ + conversion fees of 3-5% - it'd still be dearer. I'd just buy Dave's 121GW and still end up saving a fair change.
@@mrpetit2 $424 plus tax plus $30 delivery from TME
@@ryebis I've ordered BM869s and BM859s from TME here in australia and both were very affordable. You think a local retailer would only add 50% markup? In your dreams, IMO it'd be at least 100% markup. Prices here are absolute-fucking-ridiculous!
IMHO, Brymen's 786/789 and 869s are the best quality/price multimeters on the market. Am I wrong?
I'd add the 867s, slightly lesser spec 869s but cheaper and still excellent
@@adrianleitch6996 I agree Adrian!
No
A lot of people on the forum agree. It's hard to argue otherwise.
@@EEVblog2 thanks Dave! I am also an happy owner of your 121GW. great tester!