Brymen BM869s 50,000 Cycle Test, New Year's Special
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- čas přidán 27. 12. 2017
- In this video we put the Brymen BM869s rotary switch to the test.
I've been wanting to run this test for a while to help understand what the expected life of Brymen's BM869s will be with normal use.
I noticed a small mistake in this video. Data files are named using the following format:
BRAND_MODEL_LUBE_STATUS
Switch Contact LUBE: D - Dry or no lubrication, L - Lubricated
Meter Status: N- New, U - Used, D - Damage to switch area
If you look at the file name "BRYMEN_BM869s_D_U_48_Dec21_2017", the meter is obviously brand new. I have since corrected this.
The data for the meters I have tested may be found here: docs.google.com/spreadsheets/...
Answers to Frequently Asked Questions may be found here: docs.google.com/document/d/1g... - Věda a technologie
Brymen's willingness to engage openly to these tests, and honestly, is a good sign. I look forward to purchasing my BM869 this year.
Another great video!! It's really nice to see Brymen stepping up to support the community and to help you provide us with this content,,,, Thanks to you Mr, Smith and thank you Brymen!!
Brymen multimeters have survived all these tough tests. Amazing multimeter!
I've been very impressed with Brymen. I went from not knowing they existed to having three of their meters in about a year or so, everyone of them has been excellent. A few coworkers have purchased them as well, everyone has been happy. Their support, though I've never had to use it, seems from everything I've heard to be top notch.
I agree. I got the eevblog bm786 recently and plan on buying the bm869s from welectron on ebay. It's pretty cheap for what it is. About 355cad. There's no brymen reseller I can find in Canada and if I order from the US it's way too expensive. Electronics and guitars are so expensive to buy and ship from the US along with customs, the exchange rate and provincial tax along with some hidden fee that seems like it's baked in due to trade agreements between Canada and US but you can't find it. It's weird to explain. Anyway I'm rambling, sorry. Cheers
Sir, you're taking the art of meter testing to another level. Thank you!
Another win for Brymen and Joe! Very impressive.
You have no idea how much i respect you
I always liked the Brymens. It’s nice to see they would survive under harsh conditions in the field. Thanks for putting this up!
Appreciate your testing and I appreciate Brymen's stepping in with the community. I've gotta say until a year or so ago I'd never heard of Brymen, then the BM235 came along and I purchased it, Loved it, now I've got 3 Brymen meters. Very nice meters, use them daily.
As always great post,HAPPY NEW YEAR JOE AND FAMILY.
Great testing, Joe! Keep up the good work. Thank you and Happy New Year!
Best multimeter info site on CZcams, most objective. Thanks Joe!
Thank you very much for this great test!
Respect .. you sir are one professional engineer.
A great Christmas video, thanks Joe. I see a Brymen in my future too.
Good to see someone going to such lengths on longevity tests, well done. Nice to know that the meter will continue to work well once it's warranty has expired! 👏👍
It has another year on the clock and still works fine.
Another great multimeter video. I purchased a BM869s based on your prior test results and trust it as much as my Fluke, let me tell you that's saying something. Thank you for your work and to Brymen for stepping up. Happy New year.
Brymen is the real deal. Still doesn't have that Fluke yellow going for it though. Naked bearded virgins must assemble Flukes.
Great video as always! Really a good meter too
Another great video and great new test,
My biggest issue with Brymen multimeters is the local availability. I have one of their meters from the 80's. It's now relegated to hack status as it has had a hard life with faulty LCD zebra strips but it still compares accurately against my Agilent U1251. It's high resolution 40000 count was market leading back then. An under appreciated brand IMHO.
Great review! Thank you!
I purchased Bryeen based on Joes review and use it with my Hioki. Fluke is on the shelf for a while.
Thanks for sharing 😀👍 happy new year
Thanks. You too.
Thanks for another great video.
Glad you enjoyed it.
WOW! What a great video! Thanks!
Yeah I tend to let the meters speak for themselves. Beats blabbing on for a half hour about how great they are.
seems like they really know what they are doing.
Nice exhaustive test, as usual. Very professional and unbiased. Is it me or is the display on the new unit tinted slightly darker than your old one ? Thanks for sharing and happy new year to you and your family and friends !
Yes there is a slight difference between them when looking through the lens but I am not sure why. There are a few things to consider. It could be a lot to lot variance but I also had scratched the older one and later wet sanded and polished it. Then added a Belkin protective film over the lens. It may also be age and exposure to the sun. The case is also a little lighter on my old one. Again it is very subtle and I did not even notice it until I had the two side-by-side in the sun. I know with my old Fluke handheld scopes, the polarizer on one was damaged from the sun.
Joe the type of guy swimming with his meters.
Estaba por comprar Fluke 87v. Hasta que encontré a Brymen. Sinceramente me asombro su construcción y fiabilidad, además de su precio.
Los dos son muy buenos, pero el Brymen no se si tiene Autohold . Eso marca la diferencia.
@@elektrikahectorfernandezol5341 Be aware that proper grammar is important when posting comments. Using a period without a space will cause youtube to detect it as a link and filter it. I don't check the filtered comments very often.
@@joesmith-je3tq ya está corregido
So I take it if Joe uses this as his main meter it’s gotto be a real good meter and via the various tests it stands up well at a good price. Thanks Joe I’m buying one. Better value than the Fluke 87
For what I am doing on the bench, it is still my favorite handheld meter.
Thinking aloud. 50,000... let's say I use my meter 5 days a week, 200 days a year at most, and I operate the switch 100 times each day... that would be 2.5 years of wear. In practice I know I wouldn't use it that much. Sounds like it's good enough for me !
Superb video, seems like everyone who has had a crack at these meters is on top of their game. I enjoyed your approach :-) Happy to support Taiwan and Poland and buy more of these. My 20 year old Chinese ones have met their end of life and it's time for me to get some quality into my set of gear, and Brymen via TME in Poland will be supplying it to support both countries against their respective foes.
Another great video Joe. Byrmen don't seem to be afraid to stand up to the plate. Will be putting this meter high up on my list. Is it possible to get spare contacts from brymen. Best wishes from Northern Ireland.
I'm in the US and just received a Bryman 869s. I bought it from tme in Poland. Their shipping time was amazingly fast, about 5 days. The initial calibration seemed to be off measuring DC voltages, almost like it had never been calibrated. I found a reference on the web that described how to calibrate it and with a precision 5v source I calibrated the zero and 5v levels. Now it reads within a couple of 10 thousands. Now it's an amazing meter.
My guess is you just screwed up the alignment but the readings you are getting make you feel better.
@@joesmith-je3tq The DMM Check Plus has higher precision than the Bryman BM869s. Before I calibrated it the meter was off at zero as well as 5v. Now when shorting the leads the meter zero's out and I read within 1 or 2 ten thousanths up to 6.xxx volts. I'm not sure why you think I "screwed up the alignment".
I should also add that I have a Fluke 87V that I've tested on the DMM Check Plus which reads dead-on, so that implies the DMM Check Plus is accurate.
@@kellyanderson7115 I'm not a fan of guess work. There are labs that can actually check if your meter is in calibration and align it if needed.
@@joesmith-je3tq I'm sorry but I don't understand what you consider "guess work". From the calibration guide..."Periodic calibration is required to conduct correct measurement. This instrument needs periodic calibration at intervals of one year. Calibrate the instrument according to the following procedures." No where does it say it requires calibration at a calibration lab. DMM Check Plus is calibrated on one of those expensive calibration machines...that's good enough for me.
Great video, incredible detail. Perhaps the o-ring around the battery compartment got damaged (or deformed) by the thin wires you brought out for measuring the switch contact resistance? I love my Brymen 867 - it's my most-used meter on the bench.
Well, there are two flaws with your hypotheses. First, I never tightened the cover but let's say I did. If you watch the video again, you will note that I ran the wires out the opposite side. No matter though as I mentioned in the video, 54 does not mean stick the meter underwater.
Aha! Thanks for confirming, Joe!
Great digital multimeter...
Still my favorite handheld meter.
Exciting video, especially given how brutally you beat these things up. And that Brymen actually had the guts to send you their meter. I would bet the Brymen techs were on the edges of their seats for the duration of the videos.
The outrageous "creek" water test was most entertaining; I can imagine a clumsy user dropping the meter into the water over and over again whilst tripping overhimself over and over again. Mr Bean or Three Stooges style. Rigorous water testing nonetheless.
With them performing their own in-house life cycle testing for the rotary switches, I doubt they had much of a concern with me running an additional 20,000 cycles over what they run. But I doubt they expected me to go fishing with it.
No way Brymen would have approved your frozen fishing test. They must have fallen off their chairs when they saw that; I almost did. Made for enjoyable viewing!
Brymen gets credit for being good sports and designing a pretty robust meter.
We had another person post how they put 10s of thousands of cycles on them every year. I would imagine I could put an 80 year old working meter on a shelf and have it sit for another 20 years and still be fine. I am completely missing your point about the spring force and switch being too small. The spings contacts are spaced out so they each have their own radius. The ones located towards the mezzanine board are towards the outside perimeter. Their force is perpendicular to the PCB. How do you feel this ties in with the switch being too small? Are you suggesting a larger dial as you put it would lower the spring force?
Hello Joe! What's your opinion on the older fluke range switches, the old 20 series, the early 70 and 80 series. They where not the pcb pad type but a complete separate unit mounted on top the pcb. I would think that they went for the modern pcb pad types to reduce cost? Would be interesting to see how they compare. Thank you for this great channel! George.
George, I've had a few people asked about how older meters would compare against various tests I have ran. I really don't an opinion about the old switches you specifically mention. Obviously running a very old meter that could be near the end of it's life would not prove to be a very useful test to run. We would need some new old stock meters that have been stored in a controlled environment to really get a feel for how they would compare.
Hi Joe , Great test as usual but I was wondering about the speed of switching could be of
influence ,heat bild up and static,
In the begin you start slow (normal?) and then you speed it up
Best wish's
Start watching at about 8 minutes in. The cycle times and ramping are all explained. If you go back another minute or so, you can see Brymen's test jigs. Your question on it the slow start is normal, I can't answer what normal is. I can only disclose how I am cycling them.
Hey Joe, is the BM869s your favorite DMM? Or the Fluke 189? some video talking about your preference? Thanks
Both (BM869s / 189)
Happy new year and thanks for another flawless video.
Can I ask which software or platform you are using to analyze the data? I wonder you have developed the software yourself, however I'm curious to know which platform you are using to write your own custom softwares? (LabView or even writing from scratch with Visual C++ for example).
This question comes up from time to time. For the PC, I started with MASM and BASCOM. Later switched to Quick BASIC and then Turbo BASIC. A bit of time with FORTH. Then MSC. Later VC++. Started using LabVIEW at version 4. Was still using VC++ and some in-line assembler with it. Last year, with the newer PC, I have settled on doing everything in LabVIEW as the PC is more than fast enough now to do what I need it to without another language.
Hi guys! And what about to lubricate the contacts on PCB? For example: silicone grease or petroleum jelly. It's a good idea? How to extend the life of contacts? Sorry for my english.
czcams.com/video/e_YzwO62feQ/video.html
Thank u for that video that was very useful but what about performance how accurate the measuring?
And another question what type of probe u were using?
The probe could be anything. Post a time where you see what it is you are referring to. The manual for the BM869s is on-line. You can download it to see the specifications. I've also made other videos with this meter.
Thanks for reply the probe at the end 37:00 is it coaxial becuase i was looking for a shielded probes.
For the specification i dont truste only what i see in real life iguess this is the point of the reviews.
Thanks again
Oh, that's not a probe. It's just coax cable terminated with a BNC. It's attached to a BNC to banana adapter.
I have a multimeter from Unit ut17B PRO, and when I measure direct current the device shows a voltage but when I reverse the probes it shows a different voltage of several millivolts. let say 4 milivolts diference.
is it normal this difference of a few milivolts when you reverse the probes.
Is it a device fault or is part of the multimeter's tolerance?
Thanks
love you're tests, subscribed. I live in the US where can I buy one and have it shipped to US?
Thanks. I bought mine from TME.com.
Can't decide between BM869s and BM829s. As far as I understand, BM869s is slightly more accurate and has a low-pass filter. BM829s has non-contact voltage detection and Lo-Z mode. I will be using the multimeter primarily for my household and some occasional DIY work on a car. Just want to buy a good reliable multimeter that will last for a long time. BM829s sounds like a more relevant option, but I am still not sure. I also have no idea how bm829s compares to BM869s in terms of durability. Not too many reviews of BM829s. Can somebody comment on this? Is there some other parameter not mentioned above I need to consider? How important is having a low-pass filter? Does the accuracy of BM869s really make a difference?
this multimeter is obtained with the green lee brand the DM860A, but the DM830A is the same as the fluke 87 v with a little more functions these green lee multimeter are excellent nothing to compare to fluke
My BM869s shows zero values in Volts and Ohms mode without any measurement strips. Do you know why? I can not remember I made any heavy tests (including watering) with it..
You would need to provide a lot more detail for people to try and help you. Maybe start a thread in the EEVBLOG repair forum. Provide as much detail as possible. Good luck.
Excelente tu video amigo técnico profesional ke buen multimetro superando muchas pruebas una preg ke multimetro me recomiendas p microelectrónica RAPIDO muy PRESICION p continuidad Diodos Rrsistencias transistores frecuencia y pulsos automotrices d sensores actuadores etc gracias x ayuda orientación
Glad to help
Excellent hard test. How about Fluke? ;)
The data I had collected up to this point was shown in this video. It starts at about 23 minutes.
@30:20 fishing for DVMs ;)
I've been telling everyone about this madman on CZcams that blows up meters, so the viewer increase could be due to word of mouth? I think tying a string around a meter and throwing it in a creek is a new low for the channel. Though immersing electronics generally isn't bad in and of itself. But when powered on it isn't advisable to do. Spurious current paths, and all of that.
You must be fairly new to the channel. czcams.com/video/wkrbohiuUwU/video.html
Dremel tools and neon sign transformers and arrows may not be that good for them as well. czcams.com/video/RBkjr3b5hQo/video.html
And of course, dropping them from a few stories up onto cement may not be all that healthy for them. czcams.com/video/Dchy-0u-W7A/video.html
I wonder why they thought they would IP test every unit. I'm doubtful or very impressed!
Are you related or co worker of NTSB sir? So detail review of meter i ever watch. I am buying.
National Transportation Safety Board? No, I am not. I've ran several tests on the BM869s and it typically does very well.
Joe out of interest how you know so much about meters electronics?
I'm old and have had a lifetime to learn a few things along the way.
Hi, i have solution how to make bm869s backlight stay on forever. Do you want to try it? I have it straight from brymen.
I think 30 seconds is a bit short. If a firmware update could make it adjustable or stay on for 60 seconds, that would cover the only complaint I have about my BM257s :)
I bought a bm869s a few weeks ago, and the backlight no longer turns off after 16 seconds, as described in the manual that comes with it, it can hold at least about 2 minutes (I haven't tested the maximum backlight time). I think Brymen changed this parameter, after several complaints about it.
Taiwan has a superior VLSI technology - 4 nano meters. They are the best. So no wonder that their DMM is the best. Fluke is made in continental communist China. Marketing and HIPE are on tneir side. I have 869s for 5 years -it is superior. Also have another Taiwan DMMs - UNI-T. One of them works for over 20 years Thank you for video
I forget about the meter.whre can I get that mgnifying camera?!
I gave it away a few years ago. It was an old 1950s/60s Olympus. I have since upgraded to a 1970s Olympus trinocular head. The actual camera is a cheap AmScope.