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Voltlog
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- Опубликовано: 23 июн 2017
- Today I am taking a look at the Owon B35T, 6000 count multimeter with bluetooth connectivity. Together with the iOS or Android app you get datalogging capability over bluetooth for just $60.
Buy the Owon B35T from these sources:
Ebay: voltlog.com/y/p...
Aliexpress: voltlog.com/y/o...
Amazon: Amazon: voltlog.com/y/5...
I'm quite certain that the main IC is rebranded FS9922-DMM4 (which was used in earlier revisions). If that is the case, the auto power-off function can be disabled by pressing Select -button while turning the meter on. There isn't APO indicator on the display though, so it's hard to tell if that actually works or not, without waiting for 15+ minutes. Seems to work with my B35.
Great video, I agree with most things you mentioned.
thanks for the hint! I've tested and it works.
I was wondering why the hell the meter starts beeping and goes to sleep while I am using it!!
Thanks for the tip.
Regarding the input jacks moving and possibly breaking the solder joints, if you have a look at the lower back inside of the case there are 4 support posts molded into it that come up under the jacks and hold them in place while the leads are inserted. This keeps the jacks from moving and creating stress on the solder joints. Most people overlook these as they are examining the board and not the back as well, but those support posts are an integral part of the jack assembly when the case is assembled. Ive only had one meter that gave me problems with the solder joints breaking, and that meter did not have any support posts molded into the lower back inside of the case.
I like that it does not beep when using the rotary switch and the 2 decimals resolution for mV range. The backlight was about 50s on until automatic shut-off, you said 10s.
These are good meters for the cost. It’s “calculated” RMS but about what is expected. The only issue I have with it is that it turns off every 5 minutes and there is no way I can see to disable it.
Of course it measures capacitance. Its clearly marked on the Multimeter.
Totally missed the capacitance range while looking through the camera.
Darren Walker I was going to mention that as well. I can see how it would be missed as 4 fuctions on one selection location is quite a lot.
@2:55 "This meter does not measure capacitance". It looks like it does, 3rd selection spot shared with resistance, tone, diode.
I have B35T+ in DC it counts up until you short the leads (It has never leveled out, seems to just keep climbing).. It takes almost 10 seconds for it to zero out when I short the leads... I have checked fuses and tried to add shielding... No luck... OWON doesn't answer emails... Did I get a bad one?
Bluetooth sucks on the newer android (10) version. I don't work.;
Can't you buy better fuses and bigger move for a few pennies and put them in
can't really expect much more than 1C error with K type thermocouples. They are not very accurate.
It does do capacitance..
Maybe trying higher quality gold plated leads would improve continuity.
You keep comparing this meter to a 5 times more expensive Fluke. If that's the case, try the continuity test using the Fluke leads instead..you will be pleasantly surprised! Any meter, even a Fluke will have poor continuity if cheap leads are used. I have a cheap (10$) Excel DT-9205A , I use a good set of leads on it (Sanwa) and believe me when I say it's faster or just as fast as my 500$ Agilent U1252B when I'm probing a circuit.
I am comparing with the fluke87 because it is a known reference that most people know so they know how it feels and works not because they should be equal. The thing with the leads is generally valid for non-latched continuity testers, in this case, with a latched continuity tester, probe quality does not change the fact that it's slow responding so the pulse needs to be long enough to be recorded.
I still disagree. Well known or not, it's unfair to a meter that costs alot less money. Also, I doubt that most people know what a Fluke 87 feels like, as its out of most hobbyists price range. Personally, I would let a meter stand on its own laurels..is it decently constructed, is the input protection safe, is it accurate in its references, is it designed for the hobbyist or pro, does it instill confidence in the user, I think these types of references are much more valid than how it compares to a Fluke. If I'm going to review a 300$ Hioki than a Fluke comparison is par for the course, If I'm going to review a 20-50$ Asian pocket rocket than I'd refrain from such comparisons.
Irregardless, it was still a very informative video. Many thanks.
I really liked its data-logging capabilities but that's pretty much the only good thing about it. The delay in the continuity test is so bad that it might as well just lack the feature altogether, and the autoranging is definitely slow.
It packs a lot of features for the size though.
I noticed that it has a capacitor symbol in the diode/resistance/continuity setting so it probably measures capacitance as well. Although it's a bit weird that they packed so many measurements in the same switch position. That seems rather impractical.
Anyway, thanks for doing such a detailed review. I wasn't aware of app-powered data-logging multi-meters in the sub-$100 range.
same thing, I wasn't aware you could get bluetooth for less than $100, that's why I purchased the meter and did the review! Thank you for watching!
I bought one and got it a few days ago. Very nice meter. Not very accurate from the factory. I had to open it up and calibrate the voltage. The capacitor reading is way off too. A 100nF, read 77nF! There are 2 pots going to CAPI and CAPO of the chip (pin 20,21 I think), but messing with those doesn't seem to change much.
Any advise on how to calibrate the rest of the functionalities?
5.00037 volts from the precision voltage reference, now shows 5.000V on the display which made me very happy. Before, it was showing 4.982V.
BTW, if you turn the Bluetooth on, the meter doesn't go to sleep, which is a good thing.
Very simple and intuitive app on the Android which can control 2 devices at the same time.
I just have to find out where the heck it puts the .cvs files it generates, so I can transfer it to the PC for analysis.
Found the beeping loud and annoying. Made for hearing impaired or something. While I had it open, a piece of tape, put an end to that annoyance.
Thanks for you review which made me decide to buy it. Happy camper.
I'm not sure but I would assume the calibration is done in software for this meter, I think your best chance is to search info on the particular chipset number inside the meter, maybe you'll find some info on the forums.
Too many pots on the board to be software calibrate-able. I thought i ask before messing with it.
Now I will mess with it. Thanks for the reply.
@@ufohunter3688 How do you calibrated the voltaje measure do you remember? too much presets to fool around trying to guess the correct one. Thanks in advance.
@@tesla242 I bought a "AD584 Voltage Reference Module" from AliExpress. Its cheap and more than accurate enough for me.
@@ufohunter3688 I have voltage reference in hand (fluke), that´s not an issue. My question was about the multimeter itself. What preset did you move to get a more accurate voltage reading (factory calibration it´s just awful).
I wish they'd went with a fast non-latched continuity rather than a slow latched one.
yes, I have an old meter with non-latched continuity test and it's instantly beeping.
As long as it's accurate, we could always upgrade the internal banana jacks, I have faith in you brother. I need a tool that will tell me the positive end of capacitors. They mark them any which way coming down the assembly line. I could probably figure out a way that doesn't include a oscilloscope, any idea's?
There is a reply here that might help electronics.stackexchange.com/questions/80327/determine-the-polarity-of-aluminium-electrolytic-capacitor
$60 is a lot for the quality. You can get equivalent ones for $15 without BT. If you consider the price of a BT module ($5) the seller makes a nice margin.
I agree they must have a nice margin but we have to consider the market, can I get a better multimeter with bluetooth and datalogging app for less?
Hi, is this purchase inspired by ave? Think I've got a Déjà-vu.
Yes! I'm a fan of AVE, and I ordered the meter after seeing this meter in his video. I needed an easy way of doing data-logging for one-off situations.
VoltLog OK now it's reviled - I am also a fan of the empire of dirt. Thanks and don't put your balls in the vise.
Yup! I like his jokes :-)
I think its an excellent meter for the price. No other comes even close. BTW, it does have capacitance and its marked on the front! OR, you can pay hundreds more and get a fluke for the name sake. I am buying one.
Totally missed the capacitance range while looking through the camera.
Update: I bought the B35T+. The + plus has off-line data logging.
Excellent review. Thanks for your time.
Nice features for the price. That IS a capacitor symbol on the ohms selection, isn't it? As always great video!
Totally missed the capacitance range while looking through the camera.
They aren’t movs. They are ptcs
Some of these budget meters have horrendous continuity speed. I have a $9 Ragu 81D from Amazon and it's as fast as my BK Precision 2709B. It's almost unacceptable for the test to be bad on a $50+ meter.
It has the Capacitor symbol in two places so probably measures capacitance
Totally missed the capacitance range while looking through the camera.
It obviously happens to the best of us ;)
A Linux Bluetooth client for the newer version of this meter is available from github.com/DeanCording/owonb35
I feel your pain. If people knew the number of "Owon" rebadged meters there are, RUclips would collapse.
Looks like there is PC software available now. Dated 06/27/2017.
www.owon.com.hk/service_down.asp?SortID_1=1&SortID_2=10
There is also a B35T+ model that seems to do offline recording for a few $'s more.
Have tried connecting to the meter using a standard bluetooth adapter on my pc and it doesn't connect. The meter probably expects some non-standard pairing password so you will need to buy their bluetooth dongle for this to work.
New: owontme.com/support_PC_Software_list5
Good Job
Dissmann - LOL - that's a nice "one hung low"-clone of a genuine Bussmann-fuse :D
I think they could of gotten away with a more similar name :-) Like Bussmenn
Are you getting paid big bucks by Fluke? Because you mentioned Fluke so many times as if you want to have them a baby. I know they are the industry standard in regards to accuracy and quality but you can simply say compared to the best meters in the market or something else...
Unfortunately the big boys like Fluke don't play with the small kids like myself :-( But you are right I mention them way too much.
Thanks
For niche applications this could be a good alternative to the overpriced Mooshimeter.
I haven't done enough research on the subject but from the top of my head I don't think there is anything on the market that beats this price.
wow, the continuity is useless on this one. Same as my UT71
yes, very slow
I think the UT-61e would be a better choice since there is a big community built around testing an fixing them if they break for about the same price. As Obi-wan said, "Nothing to see here, better move on", or something like that.
I'm tempted to get one of the higher range meter from uni-t with graphical display. better resolution. Maybe I'll get one soon.
It's a pitty that they did not implement a better input protection. Looks very UNI-T like. I don't believe that this meter will fullfill anything near CAT III 1000V as printed on the housing. A 250V fuse for the 20A is a joke and the glas fuse... Ok, looks nice, accuracy is ok and bluetooth is a nice function. For me, after I got the UNI-T UT71E and had to recognize that it has similar bad input protection but a very high rated CAT. I lost the faith in it and so it would be with this meter. We are only talking about 5 to 10 USD for having a high rated CAT III or IV input protection but these producers don't care about security for their meters and what is more important their customers. They even lie to their customers concerning security.
I think professionals wouldn't be using meters from Owon and hobbyists like us don't work on high energy circuits. So it's kinda safe up to a point. But it's bad that they lie about the protection ratings..
It will do fine for mains voltages. If you work with > 220V, you shouldn't be buying meters less than $200 if you value your life. I would buy a name brand whom I can sue :)
Yes and no. The input security protection is more a thing of transients and shorts than the normal voltage or currents you are working with. Ok in maybe 99% of your work you are save with simple input protection but this protection is especially for the other 1% of usage. In safe conditions you do not need any input protection. If you ever had one of this 1% adventures you will never use an insecure meter. For me especially this has nothing to do with professional or hobbyist. But I don't want to stress this topic. It's really a pitty because for 5 to 10 bugs more you can do perfect security protection for the user and the meter.
I don't know my man, I think I'd rather stick to me fluke 87V
sure, that's my go to meter for everyday usage, but can it do datalogging via bluetooth? :-)
Stop comparing with fluke, cost 50 bucks it can't be compared
you are missing the point, I compare every meter with the fluke87 because it's a reference meter that everyone knows, it's a known reference that people can think of. Not because they should be equal.
What would you suggest he should compare it with?
With the UNI-T UT61E, cost $53
All we know Fluke is the reference for the portable DMM, i work everyday with a 179,177,1587 ecc...ecc... but at home i' also have a basic cheap 50 bucks multimeter and honestly it works very well.....but (only my two cent) the truth is, conmparing every cheap DMM with any Fluke (also the new little models like 113 and so) is impossible, no way one 50 bucks chinese DMM can stay close to the best multimeter out there!
So i understand what Juan Cruz mean.