EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: EEVblog on February 11, 2020, 12:14:41 pm
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"AmazonCommercial" brand
https://www.amazon.com/dp/B07W3BXNMP/ (https://www.amazon.com/dp/B07W3BXNMP/)
Looks like a rebadged CEM.
(https://images-na.ssl-images-amazon.com/images/I/81FnBLHYcxL._SL1500_.jpg)
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And if you go to the AmazonCommercial store page all you get is toilet paper! :-DD
https://www.amazon.com/stores/node/20774717011 (https://www.amazon.com/stores/node/20774717011)
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$32.80
https://www.amazon.com/AmazonCommercial-Count-Compact-Digital-Multimeter/dp/B07W1BL1W6/ref=sr_1_1 (https://www.amazon.com/AmazonCommercial-Count-Compact-Digital-Multimeter/dp/B07W1BL1W6/ref=sr_1_1)
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And if you go to the AmazonCommercial store page all you get is toilet paper! :-DD
https://www.amazon.com/stores/node/20774717011 (https://www.amazon.com/stores/node/20774717011)
Well that is my very first prime time I see and advertiser making a hell of a sense...
:-+ :popcorn:
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Three out of three stars from the Vine reviewers. "Amazon Vine invites the most trusted reviewers on Amazon to post opinions about new and pre-release items to help their fellow customers make informed purchase decisions. "
https://www.amazon.com/AmazonCommercial-Heavy-Digital-Multimeter-Display/dp/B07VX431NK/ref=pd_sbs_328_3/136-7519853-3866169?_encoding=UTF8&pd_rd_i=B07VX431NK&pd_rd_r=9a975092-d6ae-40bb-8479-6910d87a1800&pd_rd_w=hYM1k&pd_rd_wg=xCZcX&pf_rd_p=7cd8f929-4345-4bf2-a554-7d7588b3dd5f&pf_rd_r=11K2R3DHT9VPGCG9DX4T&psc=1&refRID=11K2R3DHT9VPGCG9DX4T (https://www.amazon.com/AmazonCommercial-Heavy-Digital-Multimeter-Display/dp/B07VX431NK/ref=pd_sbs_328_3/136-7519853-3866169?_encoding=UTF8&pd_rd_i=B07VX431NK&pd_rd_r=9a975092-d6ae-40bb-8479-6910d87a1800&pd_rd_w=hYM1k&pd_rd_wg=xCZcX&pf_rd_p=7cd8f929-4345-4bf2-a554-7d7588b3dd5f&pf_rd_r=11K2R3DHT9VPGCG9DX4T&psc=1&refRID=11K2R3DHT9VPGCG9DX4T)
http://www.cem-instruments.com/en/Goods/detail/id/686/pid/767/pids/891 (http://www.cem-instruments.com/en/Goods/detail/id/686/pid/767/pids/891)
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You could do a lot worse on Amazon than a CEM meter. I believe the original backers are still screaming for refunds yet these silly gadgets are now listed and openly available to the general public. :o ::)
https://www.amazon.com/Multimeter-Smartphone-Measurement-Electrical-Resistance/dp/B07Y7VSCQV (https://www.amazon.com/Multimeter-Smartphone-Measurement-Electrical-Resistance/dp/B07Y7VSCQV)
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Interesting; it is a CEM DT-9915H, but I can't seem to find information on their page.
IP67, 100mF and 0.5% basic accuracy at 4000 counts? It seems a reasonable product IF the input protection is done right. Well, if also the auto-ranging is reasonably fast (normally the case with such low number of counts).
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I think this is just the "Amazon Basics" approach they seem to be taking with a ton of stuff. Probably all rebadges across the board because I can't imagine they want any part in actually manufacturing that variety of products, but it seems to be reasonable, standard stuff at sometimes above competitive prices, it's probably a half decent meter for the price.
Can't speak to their massive portfolio of toliet paper, though.
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Someone buy one and put the IP67 rating to the test ::) Before you even test the Cat ratings.
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it's probably a half decent meter for the price.
Likely, CEM make ok meters.
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We need an EEvblog branded Gossen Metrawatt meter loll
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Next: Ikea multimeters. 😜
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https://www.amazon.com/dp/B07VX431NK?ref=emc_p_m_5_i (https://www.amazon.com/dp/B07VX431NK?ref=emc_p_m_5_i)
tech specs look a little weak compared to the ut181a, but i guess the price is lower. Only 10khz AC bandwidth? that seems unusually low.
I can't tell what this thing is. It looks kind of like a CEM DT-989 but with added jazz.
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https://www.amazon.com/dp/B07VX431NK?ref=emc_p_m_5_i (https://www.amazon.com/dp/B07VX431NK?ref=emc_p_m_5_i)
tech specs look a little weak compared to the ut181a, but i guess the price is lower. Only 10khz AC bandwidth? that seems unusually low.
Not for lower cost integrated RMS chipset designs, pretty standard.
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We need an EEvblog branded Gossen Metrawatt meter loll
I wouldn't like to see their OEM FOB price...
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And if you go to the AmazonCommercial store page all you get is toilet paper! :-DD
https://www.amazon.com/stores/node/20774717011 (https://www.amazon.com/stores/node/20774717011)
No sh!t 8)
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All I have to say is, back when I started school I broke down and bought a Fluke 87-V. The thing has been to hell and back in the last 15 years. Still works like new. Still has fluke's lifetime warranty. Finally took it in for cal and it barely needed adjustment, it must use semiconductor references. They define the warranty as 7 years past date of discontinuance of the model or 10 years from purchase date, whichever is greater. If you only have one meter, the fluke is worth the money. There is no replacement for a high quality tool!
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All I have to say is, back when I started school I broke down and bought a Fluke 87-V. The thing has been to hell and back in the last 15 years. Still works like new. Still has fluke's lifetime warranty. Finally took it in for cal and it barely needed adjustment, it must use semiconductor references. They define the warranty as 7 years past date of discontinuance of the model or 10 years from purchase date, whichever is greater. If you only have one meter, the fluke is worth the money. There is no replacement for a high quality tool!
Lots of people here can say the exact same thing about a really cheap meter, too.
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https://www.amazon.com/dp/B07VX431NK?ref=emc_p_m_5_i (https://www.amazon.com/dp/B07VX431NK?ref=emc_p_m_5_i)
tech specs look a little weak compared to the ut181a, but i guess the price is lower. Only 10khz AC bandwidth? that seems unusually low.
I can't tell what this thing is. It looks kind of like a CEM DT-989 but with added jazz.
It looks like the price of the UT181A has gone up about $100 from when I bought it. Cheapest I saw on Amazon is not $400. Basically the same price of a new Fluke 287. If I had to choose between the UT181A, this CEM and the 287, I would go with the Fluke.
This ad claims ETL and the EMC standards as well. So maybe they improved it, or ETL is meaningless. I am starting to lean towards the latter.
https://www.amazon.com/Datalogging-Multimeter-Software-Function-Waterproof/dp/B07SHGKT3G/ref=sr_1_8?keywords=ut181a&qid=1581595692&sr=8-8 (https://www.amazon.com/Datalogging-Multimeter-Software-Function-Waterproof/dp/B07SHGKT3G/ref=sr_1_8?keywords=ut181a&qid=1581595692&sr=8-8)
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All I have to say is, back when I started school I broke down and bought a Fluke 87-V. The thing has been to hell and back in the last 15 years. Still works like new. Still has fluke's lifetime warranty. Finally took it in for cal and it barely needed adjustment, it must use semiconductor references. They define the warranty as 7 years past date of discontinuance of the model or 10 years from purchase date, whichever is greater. If you only have one meter, the fluke is worth the money. There is no replacement for a high quality tool!
Lots of people here can say the exact same thing about a really cheap meter, too.
Except that they would have to rephrase it to "There will be many replacements of a cheap tool if you use it!" LOL
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All I have to say is, back when I started school I broke down and bought a Fluke 87-V. The thing has been to hell and back in the last 15 years. Still works like new. Still has fluke's lifetime warranty. Finally took it in for cal and it barely needed adjustment, it must use semiconductor references. They define the warranty as 7 years past date of discontinuance of the model or 10 years from purchase date, whichever is greater. If you only have one meter, the fluke is worth the money. There is no replacement for a high quality tool!
Lots of people here can say the exact same thing about a really cheap meter, too.
Except that they would have to rephrase it to "There will be many replacements of a cheap tool if you use it!" LOL
"...can say the exact same thing about a really cheap meter" :-//
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All I have to say is, back when I started school I broke down and bought a Fluke 87-V. The thing has been to hell and back in the last 15 years. Still works like new. Still has fluke's lifetime warranty. Finally took it in for cal and it barely needed adjustment, it must use semiconductor references. They define the warranty as 7 years past date of discontinuance of the model or 10 years from purchase date, whichever is greater. If you only have one meter, the fluke is worth the money. There is no replacement for a high quality tool!
Lots of people here can say the exact same thing about a really cheap meter, too.
Except that they would have to rephrase it to "There will be many replacements of a cheap tool if you use it!" LOL
"...can say the exact same thing about a really cheap meter" :-//
I don't get it
Are you implying that the cheap meter will last and perform like the Fluke? If so, this is a funny joke :-DD
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Lots of people here can say the exact same thing about a really cheap meter, too.
Except that they would have to rephrase it to "There will be many replacements of a cheap tool if you use it!" LOL
(https://www.eevblog.com/forum/chat/i-thought-all-fluke-70-series-were-made-in-usa/?action=dlattach;attach=32031;image)
See the "MADE IN CHINA"?
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See the "MADE IN CHINA"?
Yes. Are you aware of the great effort expended by Fluke (and others like them) to get the quality that they do from china? If they didn't do this, their meters would be just like all the other china junk. Same goes for Tek, Agilent, etc... this is not a secret.
I highly doubt Amazon will expend such effort nor extend such warranties ;)
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Congratulations, you own a Fluke. Would you like to contribute something other than banging on about how it's the only brand of meter worth buying?
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See the "MADE IN CHINA"?
Yes. Are you aware of the great effort expended by Fluke (and others like them) to get the quality that they do from china? If they didn't do this, their meters would be just like all the other china junk. Same goes for Tek, Agilent, etc... this is not a secret.
It would seem you have a heavy chip on your shoulder and not one made from silicon.
I own a Fluke too but not one available in the US but made expressly for the Asian market at far less cost at purchase than in the western world. If it was good enough for a technical school where they get abused by students it was gunna be good enough for my needs so I got a few extras to supply to friends.
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All I have to say is, back when I started school I broke down and bought a Fluke 87-V. The thing has been to hell and back in the last 15 years. Still works like new. Still has fluke's lifetime warranty. Finally took it in for cal and it barely needed adjustment, it must use semiconductor references. They define the warranty as 7 years past date of discontinuance of the model or 10 years from purchase date, whichever is greater. If you only have one meter, the fluke is worth the money. There is no replacement for a high quality tool!
Lots of people here can say the exact same thing about a really cheap meter, too.
Except that they would have to rephrase it to "There will be many replacements of a cheap tool if you use it!" LOL
I actually have a cheap meter that I used for automotive (professionally) and it's 20 years old with no signs of giving up soon. Been dropped in oil, coolant, borrowed by new people(the hardest test of a meter), and been used with 1kV systems and 3 phase AC systems. I've never owned a fluke multimeter, I have owned their scopes though.
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Funny how this thread has morphed...
The fact is that the Chinese government's policies are at odds with many fundamental beliefs of most of us here in the US. I personally avoid purchasing products made in China whenever possible and I'm glad I have the freedom (and finances) to do so.
But over the years I've still acquired a lot of stuff from China. I got what I paid for. These days I have a bit more disposable income so I shop differently.
Speaking of:
I couldn't resist picking up a new/return Fluke 287/FVF for $215 delivered just to see what I thought about it. Accuracy is near perfection. The selector switch is very nice. It does make graphs (slowly). But after that, the user interface leaves a lot to be desired as many reviewers have stated, and the stand is very weak and flimsy. Glare and screen visibility is a problem. The biggest disappointment is that Fluke could easily update the software running on the meter to provide a far better experience and even add/fix features. But obviously they can't be bothered.
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I personally avoid purchasing products made in China whenever possible ............
And you would happily buy Japanese or German ?
We each have a different perspective based on experience, nationality, memory of past injustices and national pride.
Mine's French after they sunk the Rainbow Warrior while tied up at port in Auckland......wars have been started over less !
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Interesting; it is a CEM DT-9915H, but I can't seem to find information on their page. [...]
OP's 90DM600 seems to be a CEM DT-9560 (http://www.cem-instruments.com/en/Product/type2/id/767) with black accents.
The pictures are hilarious, '%Hz' written on almost every switch setting and the plastic is cracked on the V jack.
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I personally avoid purchasing products made in China whenever possible ............
And you would happily buy Japanese or German ?
We each have a different perspective based on experience, nationality, memory of past injustices and national pride.
Mine's French after they sunk the Rainbow Warrior while tied up at port in Auckland......wars have been started over less !
Of course I "happily buy" products made in Japan and Germany. Things are different now.
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Interesting; it is a CEM DT-9915H, but I can't seem to find information on their page. [...]
OP's 90DM600 seems to be a CEM DT-9560 (http://www.cem-instruments.com/en/Product/type2/id/767) with black accents.
The pictures are hilarious, '%Hz' written on almost every switch setting and the plastic is cracked on the V jack.
No, no, you are mistaken! This is a high quality meter, better than fluke, according to other posters! Beware!!!
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Interesting; it is a CEM DT-9915H, but I can't seem to find information on their page. [...]
OP's 90DM600 seems to be a CEM DT-9560 (http://www.cem-instruments.com/en/Product/type2/id/767) with black accents.
The pictures are hilarious, '%Hz' written on almost every switch setting and the plastic is cracked on the V jack.
No, no, you are mistaken! This is a high quality meter, better than fluke, according to other posters! Beware!!!
Now you're just being ridiculous.
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Where something is designed/engineered and where it is manufactured are two different things. china can build good quality if you spend the extra dollars, just ask Fluke, Keysight etc. ;)
But sadly, they can't engineer a high quality DMM. Their race to the bottom gives us low prices with crappy PCB layouts, fake safety approvals and unreliable operation, buggy firmware. All their DMMs use the same copper rotary switch leafs. UGH. Screw on banana jacks? UGH. Protection circuit with auspicious bad fortune? UGH.
Some of the CEM teardowns are not bad, other models are bodges and low quality.
Is this one worth $80?
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Where something is designed/engineered and where it is manufactured are two different things. china can build good quality if you spend the extra dollars, just ask Fluke, Keysight etc. ;)
But sadly, they can't engineer a high quality DMM. Their race to the bottom gives us low prices with crappy PCB layouts, fake safety approvals and unreliable operation, buggy firmware. All their DMMs use the same copper rotary switch leafs. UGH. Screw on banana jacks? UGH. Protection circuit with auspicious bad fortune? UGH.
Some of the CEM teardowns are not bad, other models are bodges and low quality.
Is this one worth $80?
It's more than just the engineering. They can't manufacture quality without being supervised and driven by a non-china entity. This is why non-china engineers have to go over there and literally live at the manufacturing/production facilities to make this happen. You can't leave them alone, because they can't be trusted. Look at this blueskull character on here, calls himself "power electronics guy", cocky for days and yet brags about how china steals IP as if it's a good thing. Even being educated here in the USA wasn't enough to teach him some sense. If you don't babysit them, you get garbage. Period. This is more of a reason for production being moved out of china than anything else. There were high hopes for decades that things would get better, but they don't - As you and I both say, it's a race to the bottom with these guys and it only gets worse.
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Where something is designed/engineered and where it is manufactured are two different things. china can build good quality if you spend the extra dollars, just ask Fluke, Keysight etc. ;)
But sadly, they can't engineer a high quality DMM. Their race to the bottom gives us low prices with crappy PCB layouts, fake safety approvals and unreliable operation, buggy firmware. All their DMMs use the same copper rotary switch leafs. UGH. Screw on banana jacks? UGH. Protection circuit with auspicious bad fortune? UGH.
Some of the CEM teardowns are not bad, other models are bodges and low quality.
Is this one worth $80?
It's more than just the engineering. They can't manufacture quality without being supervised and driven by a non-china entity. This is why non-china engineers have to go over there and literally live at the manufacturing/production facilities to make this happen. You can't leave them alone, because they can't be trusted. Look at this blueskull character on here, calls himself "power electronics guy", cocky for days and yet brags about how china steals IP as if it's a good thing. Even being educated here in the USA wasn't enough to teach him some sense. If you don't babysit them, you get garbage. Period. This is more of a reason for production being moved out of china than anything else. There were high hopes for decades that things would get better, but they don't - As you and I both say, it's a race to the bottom with these guys and it only gets worse.
You're new here so don't know blueskull's history but all the other one eyed crap you post is just nonsense.
FYI blueskull has a Masters in EE at least.
You really should broaden your horizons.
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It's more than just the engineering. They can't manufacture quality without being supervised and driven by a non-china entity. This is why non-china engineers have to go over there and literally live at the manufacturing/production facilities to make this happen. You can't leave them alone, because they can't be trusted. Look at this blueskull character on here, calls himself "power electronics guy", cocky for days and yet brags about how china steals IP as if it's a good thing. Even being educated here in the USA wasn't enough to teach him some sense. If you don't babysit them, you get garbage. Period. This is more of a reason for production being moved out of china than anything else. There were high hopes for decades that things would get better, but they don't - As you and I both say, it's a race to the bottom with these guys and it only gets worse.
I disagree with this. Some of the arguably better designs on the market are currently being manufactured in Taiwan (Brymen is one multimeter manufacturer you might wish to investigate). That said, from an American perspective:
When I was a kid, a guitar manufactured in Mexico was considered a toy, or a piece of junk. However, given the intervening decades of experience, the instruments Fender manufactures in Mexico today are as well-built as their American counterparts. I'm talking about fit and finish, not components. They might use pot metal where the American factories use a better steel, for example; yet the instruments would fool me in a blind test.
Asia is the same way. Many years ago, anything that came out of China (or Taiwan, for that matter) was often of lesser quality. In contrast, Japan made fine tools at that time, but there are likely some aged folks who could tell you that Japan stood for "junk" in their day. The point is that it takes a number of years for any disadvantaged country with inferior technology and neophyte workmen to come up to snuff, and China has shown how they are willing to put in the time. Witness their contributions to innovation in the global shipping industry, among other examples. They just happen to produce a lot of things, and when you make things with an emphasis on quantity, as they must, quality is going to suffer. That's true of everywhere, not only China.
As for the Fluke meters manufactured in China, I think they are proof that Fluke doesn't have to hold their hand to make sure it's done right. Like any product, there are considerations. The amount of attention to QA that goes into making a Chinese Fluke obviously isn't cost-prohibitive when it comes to the bill of materials, and perhaps the savings are at the employee payroll, but I don't think it can be persuasively argued that the Chinese Flukes are necessarily an inferior product.
That said, I have owned USA-made Flukes, and I prefer them. But I also think there is a kinder way to express my preference than to simply dismiss Asian products wholesale, as you appear to be doing here.
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Interesting; it is a CEM DT-9915H, but I can't seem to find information on their page. [...]
OP's 90DM600 seems to be a CEM DT-9560 (http://www.cem-instruments.com/en/Product/type2/id/767) with black accents.
The pictures are hilarious, '%Hz' written on almost every switch setting and the plastic is cracked on the V jack.
No, no, you are mistaken! This is a high quality meter, better than fluke, according to other posters! Beware!!!
Actually I'd say anecdotal evidence isn't worth anything so while it's good we've had meters last and function well it doesn't matter because no one company owns the meter market. Everyone has made their good meters and their duds.
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Are we done with yet another meh chinese multimeter release/rebranding? The DT830B is already the clear winner in the race to the bottom :P
Now they have to think on their own and add distinguishing features or god forbid, some better quality which they can simply copy- but do not. A person born and raised under CCP propaganda seems to not value quality and is more concerned with being hostile towards other countries and conquering the world.
After WWII, W. Edwards Deming (https://en.wikipedia.org/wiki/W._Edwards_Deming) preached quality to Japan which has given that nation some good stuff, many of their exports are the best in the world.
I'm not sure what china's values are. They have finished their giant leap ahead with the single chip DMM. Now what?
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Where something is designed/engineered and where it is manufactured are two different things. china can build good quality if you spend the extra dollars, just ask Fluke, Keysight etc. ;)
But sadly, they can't engineer a high quality DMM. Their race to the bottom gives us low prices with crappy PCB layouts, fake safety approvals and unreliable operation, buggy firmware. All their DMMs use the same copper rotary switch leafs. UGH. Screw on banana jacks? UGH. Protection circuit with auspicious bad fortune? UGH.
Some of the CEM teardowns are not bad, other models are bodges and low quality.
Is this one worth $80?
It's more than just the engineering. They can't manufacture quality without being supervised and driven by a non-china entity. This is why non-china engineers have to go over there and literally live at the manufacturing/production facilities to make this happen. You can't leave them alone, because they can't be trusted. Look at this blueskull character on here, calls himself "power electronics guy", cocky for days and yet brags about how china steals IP as if it's a good thing. Even being educated here in the USA wasn't enough to teach him some sense. If you don't babysit them, you get garbage. Period. This is more of a reason for production being moved out of china than anything else. There were high hopes for decades that things would get better, but they don't - As you and I both say, it's a race to the bottom with these guys and it only gets worse.
Please take your rubbish to another site! Your Generalization is for a start WRONG and before you continue to shove your flag into this thread again about MULTIMETERS specifically a range of rebranded ones think before typing.
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Where something is designed/engineered and where it is manufactured are two different things. china can build good quality if you spend the extra dollars, just ask Fluke, Keysight etc. ;)
But sadly, they can't engineer a high quality DMM. Their race to the bottom gives us low prices with crappy PCB layouts, fake safety approvals and unreliable operation, buggy firmware. All their DMMs use the same copper rotary switch leafs. UGH. Screw on banana jacks? UGH. Protection circuit with auspicious bad fortune? UGH.
Some of the CEM teardowns are not bad, other models are bodges and low quality.
Is this one worth $80?
Interesting. So when you disagree with someone, instead of further conjecture, you prefer for them to disappear?
I'm glad you don't have a Star Trek Phaser :-DD
It's more than just the engineering. They can't manufacture quality without being supervised and driven by a non-china entity. This is why non-china engineers have to go over there and literally live at the manufacturing/production facilities to make this happen. You can't leave them alone, because they can't be trusted. Look at this blueskull character on here, calls himself "power electronics guy", cocky for days and yet brags about how china steals IP as if it's a good thing. Even being educated here in the USA wasn't enough to teach him some sense. If you don't babysit them, you get garbage. Period. This is more of a reason for production being moved out of china than anything else. There were high hopes for decades that things would get better, but they don't - As you and I both say, it's a race to the bottom with these guys and it only gets worse.
Please take your rubbish to another site! Your Generalization is for a start WRONG and before you continue to shove your flag into this thread again about MULTIMETERS specifically a range of rebranded ones think before typing.
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If you continue to flag wave on this site in particular and sledge other members who in this case are not even involved in this thread then you are out of order!
The rest of the world quite frankly has had a gut full of US politics and pro US anti China crap. So yes go elsewhere to discuss that is the very very polite version of what I am thinking. :palm:
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If you continue to flag wave on this site in particular and sledge other members who in this case are not even involved in this thread then you are out of order!
The rest of the world quite frankly has had a gut full of US politics and pro US anti China crap. So yes go elsewhere to discuss that is the very very polite version of what I am thinking. :palm:
We are talking about overall quality and longevity of a multimeter and engaging in conjecture regarding whether or not there is a quality difference between products originating in china, vs. originating in countries that lead in engineering and manufacture in china.
You are making this about politics, not I. I am stating facts when I talk about china quality issues and quite frankly, if you aren't aware of these issues, then you should take note!!! No more politics statements, go away!!!
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You sought to trash talk another member among other things. Back when I went to school statements like yours had a name 'rash generalizations' and like way back when you can not make all encompassing judgments with no evidence. Not ALL things from China are A,B and C lumped together. If you want to dump on China put on a Hat and go attend a Political Rally SOMEWHERE ELSE !
As you are 'allegedly' a newbie READ THIS https://www.eevblog.com/forum/chat/forum-rules-please-read/ (https://www.eevblog.com/forum/chat/forum-rules-please-read/)
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You sought to trash talk another member among other things. Back when I went to school statements like yours had a name 'rash generalizations' and like way back when you can not make all encompassing judgments with no evidence. Not ALL things from China are A,B and C lumped together. If you want to dump on China put on a Hat and go attend a Political Rally SOMEWHERE ELSE !
As you are 'allegedly' a newbie READ THIS https://www.eevblog.com/forum/chat/forum-rules-please-read/ (https://www.eevblog.com/forum/chat/forum-rules-please-read/)
No, no, no. You are totally misunderstanding. The Fluke meters are made in china. But they do not originate in china. Fluke implements quality control and various other measures to ensure a much higher level of quality than you get from a china-origin product.
My comment about blueskull was about his blatant statements about stealing IP, and he is proud of it, so this does not qualify as trash talk and I don't think the statement would bother him one bit.
You need to chill out, dude.
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Rash Generalization 1
They can't manufacture quality without being supervised and driven by a non-china entity.
Provide evidence that this holds true in ALL cases!
verging on racial attack but lets just call it another Rash generalization 2 You can't leave them alone, because they can't be trusted
Personal attack Even being educated here in the USA wasn't enough to teach him some sense.
Put down someone on a forum you 'allegedly' have been on for a week and don't know IRL or have extended contact with.
If you want to make blanket all encompassing attacks on entities be it personal, company, or country then either put up evidence or don't make them.
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You need to chill out, dude.
I'm extremely tired of seeing your prejudiced rants in half the recent threads. Please have some basic human decency and etiquette.
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Is that input jack cracked or what's going on here? this is from the Amazon pic BTW.
[attachimg=1]
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It could be either a mockup or a pre-release product that went through some abuse. If such thing is seen in a final product, Amazon will probably accept the return.
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Quite likely being on the cheaper end of quality it is actually a split socket :-- Bottom of the barrel clamp meter you can see the split on one of them in particular.
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Ok so I am really sorry to trigger you guys (HA! SCOPE JOKE! GET IT!!!) but some people really need to chill out. The quality issues I mention are well known everywhere and yet you're trying to grasp for ways to discount this claim without actually providing any evidence, while at the same time asking me to provide evidence of this common knowledge. This is literally a meme. Now stop pretending to be vicariously offended and let's get back to talking about multimeters!!!
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Thread cleaned up.
Now, how about those Amazon brand meters hey...
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The 90DM890 looks interesting with data logging features. I wonder how the screen looks in bright sunlight.
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Not seeing any rebadged meters that strike me as particularly good deals so far. Interested to see what other products may be sold down the road.
If it weren't for all the Amazon Vine reviews on their products I'd think that AmazonCommercial has no real affiliation with Amazon and was just another storefront like Naroote or Rosvola. Weird that search results page layout changes from grid to list depending on what department you're looking in. The number of results shown per page is even different between 2 departments both in grid arrangement.
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Interesting; it is a CEM DT-9915H, but I can't seem to find information on their page. [...]
OP's 90DM600 seems to be a CEM DT-9560 (http://www.cem-instruments.com/en/Product/type2/id/767) with black accents.
Yes, I thought of that as well, but Amazon claims the meter has 6000 counts while the DT-9560 has 4000.
(edit - actually, I think Dave edited the original post. The link takes you to the 6000 count but there is a cheaper version with 4000 counts as well).
Yesterday I found the information on CEM's 2020 catalog about the DT-9915H, but they carefully removed the PDF catalog from their website. Fortunately I had downloaded it and you can see it at:
https://drive.google.com/open?id=1G6Cz8l92F08k2F4kwCzwQUQ_oXmkQHfF (https://drive.google.com/open?id=1G6Cz8l92F08k2F4kwCzwQUQ_oXmkQHfF)
The pictures are hilarious, '%Hz' written on almost every switch setting and the plastic is cracked on the V jack.
Hehehehe... I hadn't noticed that.
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It's more than just the engineering. They can't manufacture quality without being supervised and driven by a non-china entity. This is why non-china engineers have to go over there and literally live at the manufacturing/production facilities to make this happen. You can't leave them alone, because they can't be trusted. Look at this blueskull character on here, calls himself "power electronics guy", cocky for days and yet brags about how china steals IP as if it's a good thing. Even being educated here in the USA wasn't enough to teach him some sense. If you don't babysit them, you get garbage. Period. This is more of a reason for production being moved out of china than anything else. There were high hopes for decades that things would get better, but they don't - As you and I both say, it's a race to the bottom with these guys and it only gets worse.
I think I might know you. HP engineer?I've heard that before near word for word, which I found shocking at the time. Regardless, nice to have options at various price ranges.
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Currently $179.78 (dropped from $346.00).
[url]https://www.amazon.com/AmazonCommercial-Heavy-Digital-Multimeter-Display/dp/B07VX431NK]https://www.amazon.com/AmazonCommercial-Heavy-Digital-Multimeter-Display/dp/B07VX431NK] [url]https://www.amazon.com/AmazonCommercial-Heavy-Digital-Multimeter-Display/dp/B07VX431NK (http://[url=https://www.amazon.com/AmazonCommercial-Heavy-Digital-Multimeter-Display/dp/B07VX431NK)
[/url]
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Holy cow, that's a bargain for a 50,000 count datalogging meter. TFT no less.
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Likely, CEM make ok meters.
Better than UNI-T ?
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Holy cow, that's a bargain for a 50,000 count datalogging meter. TFT no less.
And the very generous towel storage :o
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Likely, CEM make ok meters.
Better than UNI-T ?
The CEM meter I have (a rebadged Reed 5001 LCR Meter) lacks on quality control. In other words, its design and features are quite alright but the build lacks the finish I saw on the Uni-T meters I own/owned (UT61E, UT136C, UT123): slanted blades, uncleaned boards with flux, especially around the manually soldered elements (jacks, blades, etc.), some grime on the board, etc.
A few years ago Extech was in hot water due to severe build quality control issues with their CEM meters.
I would put them a notch below Uni-T.
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I asked because I still have a balance between CEM DT9979 and UNI-T UT181A .
I know Dave's opinion about UNI-T : they suck .
Personal I am impressed by UNIT 181A but I am still catched by CEM. Speciffications are ok .
Now come this Amazon DM 90DM890 ...
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I asked because I still have a balance between CEM DT9979 and UNI-T UT181A .
I know Dave's opinion about UNI-T : they suck .
Personal I am impressed by UNIT 181A but I am still catched by CEM. Speciffications are ok .
Now come this Amazon DM 90DM890 ...
Again, not all Uni-T meters are bad. Dave did a video of the UT71E which is very expensive and functionally lacking - nobody quite understood why he was so surprised with quality when purchased that particular model (thread (https://www.eevblog.com/forum/blog/eevblog-712-uni-t-ut71e-multimeter-%28why-uni-t-meters-suck%29/)).
Other models are much more reasonable: for example, the UT61E is quite reasonable for low power electronics if you can find it at a good price (I got mine for about US$30 new) - the major issue is the lack of decent input protection and there are reported issues with its long term stability (thread (https://www.eevblog.com/forum/testgear/ut61e-ua-measurement-problem/)). Mine has been going strong for about three years.
The UT181A is one of the favourite (in features) of an expert resident (joeqsmith), although it is the same story as the UT61E: it lacks input protection (thread (https://www.eevblog.com/forum/testgear/hear-kitty-kitty-kitty-nope-not-that-kind-of-cat/msg908123/#msg908123)).
The UT136A/B/C/D are great compact meters - again completely lacking input protection (thread (https://www.eevblog.com/forum/testgear/review-uni-t-ut136b-tired-of-the-multimeter-snobs-a-very-nice-budget-meter!/)).
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I asked because I still have a balance between CEM DT9979 and UNI-T UT181A .
I know Dave's opinion about UNI-T : they suck .
Personal I am impressed by UNIT 181A but I am still catched by CEM. Speciffications are ok .
Now come this Amazon DM 90DM890 ...
The by invitation only, five star vine voice reviewers don't mention about pulling that logged data into something useful, like a PC. You may want to download and read the manual first to make sure it fits your needs.
I am not sure if the wireless interface protocol for the DT9979 is open. The UT181A is not but it has been reversed engineered if that is important to you.
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I know Dave's opinion about UNI-T : they suck .
They have gotten better in recent years, some models even UL tested.
The UT10A pocket meter for example won my $20 pocket meter shootout.
And the 61E offers great bang-per-buck.
The problem with Uni-T is that models can vary from great to awful, even in the same series (eg. the 61 series there are A through E models, all very different)
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Interesting; it is a CEM DT-9915H, but I can't seem to find information on their page.
IP67, 100mF and 0.5% basic accuracy at 4000 counts? It seems a reasonable product IF the input protection is done right. Well, if also the auto-ranging is reasonably fast (normally the case with such low number of counts).
The page says the Amazon 90DM600 is a CEM DT-9560.
The Amazon 90DM890 is a CEM DT-989
The CEM models are all listed in the Specifications next to the pictures.
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I just got my 90DM890.
A few quick impressions, in no particular order.
1. It looks and it feels good, like a quality product, nice grip. “Amazon commercial” splash screen at power up. Boot up time about 2 sec. Nice and bright screen, easy to read indoors. Haven’t checked outside in bright sunlight.
2. It’s smaller than I expected (for some reason).
3. It *seems* very accurate (within published specs or better), on par with my more expensive meters (Fluke 279, Agilent U1272A) - when compared against my newer Keithley DM6550. Update rate is slower (about 3 readings/sec on mV range).
4. Limited AC bandwidth – AC voltage OK-ish up to 20KHz (the voltage reading drops to about 98% at 20kHz, 90% at 22 kHz and to 73% at 25 KHz). Even my Fluke 87v does better.
5. Continuity check: OK, but not impressively fast buzzer.
6. Data logging is neat and easy to use. You can record and save traces (update rates between 0.2 sec and 10 sec) and inspect them later (hop from data point to data point with a cursor) but you can’t export the data out of the meter. Neither wired nor wireless connectivity implemented (unless I’m blatantly missing something)... You can check the firmware version but you’re not supposed update it or calibrate the meter yourself (though there is a password protected calibration menu). You can offset the temperature reading though (to match a particular thermocouple; the one that came with the meter was about 4C off).
7. R/C auto range measurements – accurate, but kind of slow. It takes about 3 sec to measure a resistor on auto range and about 1 sec on manual range. Capacitors take longer (about 4 sec for a 1 uF capacitor, on both auto and manual range). Capacitor measurement display update rate is about 1 s. Unlike other meters that only display the stable measured value (and the display stays blank until then, e.g. my Fluke 87v), this one displays some intermediate meaningless values during auto-ranging. It’s up to you to decide when the value stabilized (that adds another 1s cycle to the total measuring time...).
Overall, not bad.
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Thanks for the brief overview. Pretty interesting.
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I just got my 90DM890.
...
6. Data logging is neat and easy to use. You can record and save traces (update rates between 0.2 sec and 10 sec) and inspect them later (hop from data point to data point with a cursor) but you can’t export the data out of the meter. Neither wired nor wireless connectivity implemented (unless I’m blatantly missing something)... You can check the firmware version but you’re not supposed update it or calibrate the meter yourself (though there is a password protected calibration menu). You can offset the temperature reading though (to match a particular thermocouple; the one that came with the meter was about 4C off).
...
Very helpful. Thanks for the post. I would invite you to become a vine voice reviewer if I could.
Normally if I am logging, I include the data in a report. I'm nothing thinking taking pictures of the meter's LCD would be very good. Many times I will also post process the data I collect.
The DT9979 looks interesting. Maybe Amazon will carry it at some point.
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Indeed, the DT9979 looks very interesting. Anybody know any details about the logging software?
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I made an account just to comment...
I looked into the product page here: https://drive.google.com/file/d/1G6Cz8l92F08k2F4kwCzwQUQ_oXmkQHfF/view (https://drive.google.com/file/d/1G6Cz8l92F08k2F4kwCzwQUQ_oXmkQHfF/view) and the meter is listed on page 60.
It looks like the DT-989/988 have bluetooth data transfer. It uses the meterbox pro app (android and iphone both). Can someone with the meter (Caliaxy?) give it a shot please? I will probably buy it if it works.
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I’m sorry, I can’t, I just returned it. The UPS guy just picked it up from my front door about two hours ago... I new that the CEM DT-989 version has Bluetooth, but it never occurred to me to install the meterbox pro app to check, I should have done that.... :palm:
What I did do was to look carefully through the menus for a Bluetooth option. According to the original CEM DT-989 manual I found online (page 25, see link below), there should have been a Bluetooth ON/OFF option in the menu that was simply missing in the Amazon version of the meter (other than that, the menus looked identical). I also checked (without success) for any Bluetooth device in range of my iPhone (though, without installing the app, I realize this doesn’t mean much). It occurred to me to open it up >:D but I resisted :-\
That, plus the fact that bluetooth was not advertised anywhere in the Amazon description (or on the meter itself, as on the CEM version) made me believe that the Amazon version was, very likely, a stripped-down version without Bluetooth. So I returned it. Too bad because, in any other respect, it’s a very nice meter.
https://fccid.io/WIGDT-989/User-Manual/User-manual-pdf-2858098 (https://fccid.io/WIGDT-989/User-Manual/User-manual-pdf-2858098)
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I just bought CEM DT 9979 from Amazon as a cheap alternative to Fluke 289 . I like this meter (Fluke289) but I don't think it worth the money as I got 6,5 digit bench DMM at this money .
After buying I wasn't so happy with it so I wanted to return but transport fee is half of his price (is not sold by Amazon but CEM onAmazon). Display is the biggest problem and about precission is easy beaten by Brymen 867s. Brymen is more liniar along with Siglent 6,5 digit DMM.
If you want more info let me know .
L.E. - It use Meterbox which is a crappy software . On Android I can't connect (two versions try) . On PC there is Bluetooth Multimeter app wich connect fast but it crash very easy. Not too much help .
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I was checking out 2 meters before I bought the Greenlee which was made by Allsun. One was from AmazonCommerical which was a CEM DT-9915H. One was from Kaiweets which was a Habotest ht118a.
The price of the Amazon meter goes up and down but still about the same as the Kaiweets. The interesting thing is that the Amazon meter only has a hand full of reviews. The Kaiweets has close to 600. I check the date for their first review. The Amazon was from 1/2020. The Kaiweets was from 8/2019. So, not that far apart.
There is no way the Kaiweets can out sale this many meters. Are the reviews all fake?
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It's a no-name Chinese meter at a low price being sold on Amazon - you think they're real?
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You think Amazon itself commissions fake reviews?
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You think Amazon itself commissions fake reviews?
No, I think it's probably the biggest selling platform and fake review target in the world, and many Chinese businesses do not remotely share the same view of ethics we do.
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Not the review I am wondering the most. I am wondering what the business process is.
So, I am selling a meter. I want good review. So, I pay a company to have people buy my meter and write review. What do these people do with the meters they bought? Mail them all back to me and I ship them all back to Amazon?
One way I can guess is to check the review date. I still see active reviews being post as of 4/2020. If I guess correctly, the review will stop after June. (for a 1-yr contract).
For the Amazon meter, it actually says Amazon sent the meters free to the VINE people to review.
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You think Amazon itself commissions fake reviews?
No, I think it's probably the biggest selling platform and fake review target in the world, and many Chinese businesses do not remotely share the same view of ethics we do.
Yeah but it’s not a Chinese vendor, it’s an amazon branded product, so no third party sellers.
It strains belief to think the OEM would go and spam its customers’ pages with fake reviews.
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You think Amazon itself commissions fake reviews?
No, I think it's probably the biggest selling platform and fake review target in the world, and many Chinese businesses do not remotely share the same view of ethics we do.
Yeah but it’s not a Chinese vendor, it’s an amazon branded product, so no third party sellers.
It strains belief to think the OEM would go and spam its customers’ pages with fake reviews.
Err, 'KAIWEETS' is an Amazon brand now?
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Every time I see adjectives like "heavy duty", "professional", "precision", and "recommended", I immediately look at the price. They just don't make any sense.
Sure, they are quick to replace "defective" products and fast, but frustration, time, and parts cost more then offsets savings. Also, counterfeit products are rampant. I've got what appears to be a copy of counterfeiter products, too.
I just don't trust them for anything important anymore.
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You think Amazon itself commissions fake reviews?
No, I think it's probably the biggest selling platform and fake review target in the world, and many Chinese businesses do not remotely share the same view of ethics we do.
Yeah but it’s not a Chinese vendor, it’s an amazon branded product, so no third party sellers.
It strains belief to think the OEM would go and spam its customers’ pages with fake reviews.
Err, 'KAIWEETS' is an Amazon brand now?
Oh, sorry, I thought it was in reference to the Amazon meter. Mea culpa!
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Every time I see adjectives like "heavy duty", "professional", "precision", and "recommended", I immediately look at the price. They just don't make any sense.
Only tangentially related rant: the local fleabay equivalent is full of shitty local vendors who use the word “profi” (“pro” in German) on everything. Except that I’d say there’s an inverse relationship between the likelihood that they apply “profi” and the actual likelihood of it being a professional product. It’s so bad that if I see “profi” in the listing, I automatically assume it’s junk, and I’d say that 95% of the time it is. True professional stuff is just listed by name/model, since actual pros know which brands and models are professional or not.
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Every time I see adjectives like "heavy duty", "professional", "precision", and "recommended", I immediately look at the price. They just don't make any sense.
Only tangentially related rant: the local fleabay equivalent is full of shitty local vendors who use the word “profi” (“pro” in German) on everything. Except that I’d say there’s an inverse relationship between the likelihood that they apply “profi” and the actual likelihood of it being a professional product. It’s so bad that if I see “profi” in the listing, I automatically assume it’s junk, and I’d say that 95% of the time it is. True professional stuff is just listed by name/model, since actual pros know which brands and models are professional or not.
For professional use only. On the shelves of every DIY store known to man.
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Every time I see adjectives like "heavy duty", "professional", "precision", and "recommended", I immediately look at the price. They just don't make any sense.
Only tangentially related rant: the local fleabay equivalent is full of shitty local vendors who use the word “profi” (“pro” in German) on everything. Except that I’d say there’s an inverse relationship between the likelihood that they apply “profi” and the actual likelihood of it being a professional product. It’s so bad that if I see “profi” in the listing, I automatically assume it’s junk, and I’d say that 95% of the time it is. True professional stuff is just listed by name/model, since actual pros know which brands and models are professional or not.
Oh, it's like the Pro'skit brand or the "contractor grade" or "pro line" specifiers at the hardware store. :palm:
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There are some exclusions to that label. Sometimes "PRO" has a different warranty. If I buy Craftsman tools and use them to do work professionally there is no warranty. Some other brands also have a lackluster warranty but the "PRO" label confers a much better one although you do need to check this, it's not a rule but when you have a standard and pro it's typically the warranty being the real difference.
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Every time I see adjectives like "heavy duty", "professional", "precision", and "recommended", I immediately look at the price. They just don't make any sense.
Only tangentially related rant: the local fleabay equivalent is full of shitty local vendors who use the word “profi” (“pro” in German) on everything. Except that I’d say there’s an inverse relationship between the likelihood that they apply “profi” and the actual likelihood of it being a professional product. It’s so bad that if I see “profi” in the listing, I automatically assume it’s junk, and I’d say that 95% of the time it is. True professional stuff is just listed by name/model, since actual pros know which brands and models are professional or not.
For professional use only. On the shelves of every DIY store known to man.
I can't say I've ever seen that, actually, and I've spent plenty of time in DIY stores in USA and CH. Could it be a UK liability thing, masqueraded as advertising?
Every time I see adjectives like "heavy duty", "professional", "precision", and "recommended", I immediately look at the price. They just don't make any sense.
Only tangentially related rant: the local fleabay equivalent is full of shitty local vendors who use the word “profi” (“pro” in German) on everything. Except that I’d say there’s an inverse relationship between the likelihood that they apply “profi” and the actual likelihood of it being a professional product. It’s so bad that if I see “profi” in the listing, I automatically assume it’s junk, and I’d say that 95% of the time it is. True professional stuff is just listed by name/model, since actual pros know which brands and models are professional or not.
Oh, it's like the Pro'skit brand or the "contractor grade" or "pro line" specifiers at the hardware store. :palm:
If only... the crap those local auction site hawkers are selling could only aspire to the quality of the things you mention. :(
Oddly, it's not even only for new things: it's also what some professional sellers of used crap do. So they might take a dirty, old rebadged Mastech meter, itself only worth $50 new back in the day, and label it as "profi" and ask $80 for it. Absolutely nuts, and makes the site way less useful than eBay. :(
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Oddly, it's not even only for new things: it's also what some professional sellers of used crap do. So they might take a dirty, old rebadged Mastech meter, itself only worth $50 new back in the day, and label it as "profi" and ask $80 for it. Absolutely nuts, and makes the site way less useful than eBay. :(
This happens with the local ad sales here, but with anything automotive. A crappy SnapOn manual range multimeter with 2mm thick grease layer or a 2000 count 7106-based M830B clone from Greenlee selling for ridiculous prices - I have no idea who buys these.
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Every time I see adjectives like "heavy duty", "professional", "precision", and "recommended", I immediately look at the price. They just don't make any sense.
Only tangentially related rant: the local fleabay equivalent is full of shitty local vendors who use the word “profi” (“pro” in German) on everything. Except that I’d say there’s an inverse relationship between the likelihood that they apply “profi” and the actual likelihood of it being a professional product. It’s so bad that if I see “profi” in the listing, I automatically assume it’s junk, and I’d say that 95% of the time it is. True professional stuff is just listed by name/model, since actual pros know which brands and models are professional or not.
For professional use only. On the shelves of every DIY store known to man.
I can't say I've ever seen that, actually, and I've spent plenty of time in DIY stores in USA and CH. Could it be a UK liability thing, masqueraded as advertising?
Seems to be related to REACH, so not a UK thing, but yes. I hadn't realised that.
I will continue to non-professionally purchase products which contain hazardous and effective chemicals regardless. Perhaps they actually enforce that over in CH - they surely do not here. At least in adhesives, sealants, foam, and so forth, real paint is becoming harder to find.
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Every time I see adjectives like "heavy duty", "professional", "precision", and "recommended", I immediately look at the price. They just don't make any sense.
Only tangentially related rant: the local fleabay equivalent is full of shitty local vendors who use the word “profi” (“pro” in German) on everything. Except that I’d say there’s an inverse relationship between the likelihood that they apply “profi” and the actual likelihood of it being a professional product. It’s so bad that if I see “profi” in the listing, I automatically assume it’s junk, and I’d say that 95% of the time it is. True professional stuff is just listed by name/model, since actual pros know which brands and models are professional or not.
For professional use only. On the shelves of every DIY store known to man.
I can't say I've ever seen that, actually, and I've spent plenty of time in DIY stores in USA and CH. Could it be a UK liability thing, masqueraded as advertising?
Seems to be related to REACH, so not a UK thing, but yes. I hadn't realised that.
I will continue to non-professionally purchase products which contain hazardous and effective chemicals regardless. Perhaps they actually enforce that over in CH - they surely do not here. At least in adhesives, sealants, foam, and so forth, real paint is becoming harder to find.
Oh, gotcha. REACH is also a thing here, but they tend to not even have the pro-only stuff in regular retail stores. Switzerland is a place where actual professionals have dedicated outlets and don’t overlap with consumers very much.
The only place I’ve really run into it is mail-order companies that do sell to consumers, but whose main market is industry. Like the local electronics distributor, which recently blocked nearly all chemicals to consumers, even just plain IPA. (That is no doubt an error, but dumb nonetheless.) And yet another distributor owned by the same parent company will happily sell it to me... :palm:
And of course in that case, exactly not the same thing as the crappy auction site vendors, who are taking the polar opposite of professional products and slapping the word “pro” on it.
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And of course in that case, exactly not the same thing as the crappy auction site vendors, who are taking the polar opposite of professional products and slapping the word “pro” on it.
Yeah, I hadn't realised it was REACH. I'm pretty sure there are DIY crap products labeled the same way for marketing, but it's a bit hard to go find them at the moment.
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Has anyone here really tested the thing ?
Or is it just a post to bitch about amazon without much regards for the actual product ?
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Has anyone here really tested the thing ?
Or is it just a post to bitch about amazon without much regards for the actual product ?
I did (see above) and concluded that it is not bad at all (though you never know how it ages and how well it takes abuse). But Dave mentioned at the beginning at the thread that CEM makes decent meters, so it might really be a score.
Meanwhile, Amazon USA dropped the price with another ~$30. You can currently get a 50000 count meter with logging (but with inability to export data, crappy AC bandwidth and slow capacitance measurements) for ~$146.
Not bad, if you accept that you can’t have everything for a given price.
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Ok so that's the useful information. All in all good value for money for a mid/low price range.
All the rest is just :blah:
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found a YT Channel review link of the Amazon Commercial meter
https://www.youtube.com/watch?v=hC_uERtTilk (https://www.youtube.com/watch?v=hC_uERtTilk)
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found a YT Channel review link of the Amazon Commercial meter
https://www.youtube.com/watch?v=hC_uERtTilk (https://www.youtube.com/watch?v=hC_uERtTilk)
That was the person pointing at a quad op-amp and explaining how it was an LCD controller. Not thinking I would take much stock in their review.
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Yea, he's an odd one. He talks about teaching people but he seems seriously in need of some education even on the things he says he knows about.
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Has anyone here really tested the thing ?
Or is it just a post to bitch about amazon without much regards for the actual product ?
I did (see above) and concluded that it is not bad at all (though you never know how it ages and how well it takes abuse). But Dave mentioned at the beginning at the thread that CEM makes decent meters, so it might really be a score.
Meanwhile, Amazon USA dropped the price with another ~$30. You can currently get a 50000 count meter with logging (but with inability to export data, crappy AC bandwidth and slow capacitance measurements) for ~$146.
Not bad, if you accept that you can’t have everything for a given price.
At that price range I would rather get a BM857 or BM867 with true data logging to a PC, the same 50000 counts (with 500000 hi-res mode) and quite good reputation, protection and robustness. Yeah, the 90DM890 is begging to be bitched about.
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Wow, that is one painful review to watch.
Not sure if that’s due to his lighting, but that meter is almost unreadable most of the time.
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I skipped to where he opens it up. Looks at C67, calls it a MOV. But the best part was when he looks at the Hycon IC:
https://youtu.be/hC_uERtTilk?t=1390
:-DD
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At that price range I would rather get a BM857 or BM867 with true data logging to a PC, the same 50000 counts (with 500000 hi-res mode) and quite good reputation, protection and robustness.
Yes, those are nice ones, but can you get them in US for that price? In the ~$150 price range I only found (quick search...) BM235, which is a much lower spec’d meter.
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Not sure if that’s due to his lighting, but that meter is almost unreadable most of the time.
Must be his lighting, mine was the brightest thing on the bench (as far as handheld meters go). Outdoors in direct sunlight it was really hard to read, which is a bummer for “professional” use (if the profession requires measuring anything outside).
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Joe, the idea of Internet truth is a constant threat in our modern society. On one hand, there is true experts like you sharing your findings and recommendations, on the other hand, there is self-proclaimed "experts" trying to help others but sometimes peppered their messages with unintended (and sometimes intended) errors due to a lack of education and experience.
Because everyone can have a voice nowadays with zero cost, discerning the truth becomes a required skill for the general population. Unfortunately, in electronics, getting this skill is not easy. I don't want to waste time watching anything else from his channel, but the fact that he has 78.5K subscriber is perhaps an indicator of the magnitude of the problem. When his AC current generator died, just looking at how he tried to measure AC current from the main with a lightbulb and bare wires hanging out, can potentially get some of his subscribers killed.
Just imagine what could have happened if Jim Jones were alive in the Internet Age.
I skipped to where he opens it up. Looks at C67, calls it a MOV. But the best part was when he looks at the Hycon IC:
https://youtu.be/hC_uERtTilk?t=1390
:-DD
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At that price range I would rather get a BM857 or BM867 with true data logging to a PC, the same 50000 counts (with 500000 hi-res mode) and quite good reputation, protection and robustness.
Yes, those are nice ones, but can you get them in US for that price? In the ~$150 price range I only found (quick search...) BM235, which is a much lower spec’d meter.
Well, the BM857S as tme.eu (https://www.tme.com/us/en-us/katalog/?search=bm857&s_field=1000011&s_order=desc) is US$135.36 and they say the express saver shipping (https://www.tme.com/us/en-us/pages/how-to-buy/7227/means-and-cost-of-transport) will set you back US$9.90 more. The BM867 (https://www.tme.com/us/en-us/katalog/?search=bm867&s_field=1000011&s_order=desc) is going for US$146.20.
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Joe, the idea of Internet truth is a constant threat in our modern society. On one hand, there is true experts like you sharing your findings and recommendations, on the other hand, there is self-proclaimed "experts" trying to help others but sometimes peppered their messages with unintended (and sometimes intended) errors due to a lack of education and experience.
Because everyone can have a voice nowadays with zero cost, discerning the truth becomes a required skill for the general population. Unfortunately, in electronics, getting this skill is not easy. I don't want to waste time watching anything else from his channel, but the fact that he has 78.5K subscriber is perhaps an indicator of the magnitude of the problem. When his AC current generator died, just looking at how he tried to measure AC current from the main with a lightbulb and bare wires hanging out, can potentially get some of his subscribers killed.
Just imagine what could have happened if Jim Jones were alive in the Internet Age.
I skipped to where he opens it up. Looks at C67, calls it a MOV. But the best part was when he looks at the Hycon IC:
https://youtu.be/hC_uERtTilk?t=1390
:-DD
While I wasn't impresses with what I saw the few times I watched, many people find his videos entertaining and possibly helpful. I started watching Dave's videos for the same reason, good entertainment.
There are some really good technical channels out there as well that I personally enjoy. That's what is great about the internet, you have so much information available at your finger tips, you can always find something that suits you.
I will say after having made a few videos it,s not zero cost. There was a lot of time involved. In my cast, a fair amount of out of pocket expenses as I refuse to advertise or take donations. It was a lot of fun but I don't plan to quit my day job.
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And to that, I am always thankful for all the great information you shared, I especially love the series you did on the VNA. Dave's videos are also superb and a great source of information.
I created some training videos in my early career for one of the largest IT company, I probably spent 10 min of work for each min of video created. So I absolutely appreciate the time you spent in putting the videos together, and I can’t begin to imagine the amount of work required for all your and Dave’s videos.
When I mentioned the zero cost, I was referring to creating a voice and outlet for what we have created. In the past, one has to find and convince a publisher to get our voice out there, self-publishing was almost unheard of. Now, all we need is a phone, and we can post anything we want. No barrier of any kind, no reviews, it is a different world.
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found a YT Channel review link of the Amazon Commercial meter
https://www.youtube.com/watch?v=hC_uERtTilk (https://www.youtube.com/watch?v=hC_uERtTilk)
That was the person pointing at a quad op-amp and explaining how it was an LCD controller. Not thinking I would take much stock in their review.
Well, he's definitely wrong, but the chip in question isn't a simple op-amp, it's the entire DMM IC, with the analog front end and ADCs.
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found a YT Channel review link of the Amazon Commercial meter
..
That was the person pointing at a quad op-amp and explaining how it was an LCD controller. Not thinking I would take much stock in their review.
Well, he's definitely wrong, but the chip in question isn't a simple op-amp, it's the entire DMM IC, with the analog front end and ADCs.
Rather than assume I'm the one without a clue, you could have asked what I was referring to as it was obvious that it was not this specific video. The video in question was on the UT210E. The following link is for where he starts to pull it apart. Pay attention as he is confident with guessing at the parts he is looking at. It's pretty funny, but sad at the same time.
https://youtu.be/0WLpc0mfYi0?t=1033
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At that price range I would rather get a BM857 or BM867 with true data logging to a PC, the same 50000 counts (with 500000 hi-res mode) and quite good reputation, protection and robustness.
Yes, those are nice ones, but can you get them in US for that price? In the ~$150 price range I only found (quick search...) BM235, which is a much lower spec’d meter.
I'm getting a sample of a new $150 class meter next week:
https://www.eevblog.com/forum/testgear/us (https://www.eevblog.com/forum/testgear/us)$150-class-multimeter/
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At that price range I would rather get a BM857 or BM867 with true data logging to a PC, the same 50000 counts (with 500000 hi-res mode) and quite good reputation, protection and robustness.
Yes, those are nice ones, but can you get them in US for that price? In the ~$150 price range I only found (quick search...) BM235, which is a much lower spec’d meter.
I'm getting a sample of a new $150 class meter next week:
https://www.eevblog.com/forum/testgear/us (https://www.eevblog.com/forum/testgear/us)$150-class-multimeter/
$150-class-multimeter (https://www.eevblog.com/forum/testgear/us$150-class-multimeter/msg3026034/#msg3026034)
Looks like you have yet to release any information. Hopefully it's a step up from UEI / Finest. Maybe a nice UNI-T?
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At that price range I would rather get a BM857 or BM867 with true data logging to a PC, the same 50000 counts (with 500000 hi-res mode) and quite good reputation, protection and robustness.
Yes, those are nice ones, but can you get them in US for that price? In the ~$150 price range I only found (quick search...) BM235, which is a much lower spec’d meter.
I'm getting a sample of a new $150 class meter next week:
https://www.eevblog.com/forum/testgear/us (https://www.eevblog.com/forum/testgear/us)$150-class-multimeter/
$150-class-multimeter (https://www.eevblog.com/forum/testgear/us$150-class-multimeter/msg3026034/#msg3026034)
Looks like you have yet to release any information.
On the contrary, there is plenty of info in that thread.
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At that price range I would rather get a BM857 or BM867 with true data logging to a PC, the same 50000 counts (with 500000 hi-res mode) and quite good reputation, protection and robustness.
Yes, those are nice ones, but can you get them in US for that price? In the ~$150 price range I only found (quick search...) BM235, which is a much lower spec’d meter.
I'm getting a sample of a new $150 class meter next week:
https://www.eevblog.com/forum/testgear/us (https://www.eevblog.com/forum/testgear/us)$150-class-multimeter/
$150-class-multimeter (https://www.eevblog.com/forum/testgear/us$150-class-multimeter/msg3026034/#msg3026034)
Looks like you have yet to release any information.
On the contrary, there is plenty of info in that thread.
Plenty?? Like the 121GW early on, no mention of the brand and very little information. After seeing the 121, it's hard to get too excited.
From your posts, we know it will cost about $150, may have some sort of UL rating, may have Bluetooth for some additional cost. Will have autohold and the normal min/max and average. We also have some sense of resolution and accuracy.
Sorry but your last post seems like click bait at best. Wait to get the meter and be honest this time with a full on Dave review! If it's shit, say it's shit.
*lazy Dave mode activated*
What's the current go for the sub US$150 meter market in terms of 60,000 counts, 0.05% DC, as good as 0.06% ohms, and 0.075% current?
... I want to know what is available in that price category. The Brymen BM867 comes close but is in the $170 range.
... because I could potentially sell one for under US$150
In case you haven't figured it out, I fishing to see if it's worthwhile stocking a US$150 class meter in addition to my $100 class BM235 and $200 class 121GW.
A rugged field meter but with EVF (no LowZ though) and lab-like resolution and accuracy at a price not a lot more than the BM235.
Now adding optional Bluetooth and upgradeable firmware...
This one will be streets ahead of the DT-9969, although it won't be dust and waterproof.
Also it may turn out to be cheaper. Although I don't know what the future Bluetooth one will sell for.
This product has now been a little bit delayed because the option of a Bluetooth footprint is being added, so that that capability
can be added in a future model without a design or safety re-certification presumably. They wanted to slip it in before sending for
UL testing. I have asked if the firmware can support it and if users can then simply solder in their own Bluetooth module, that's a maybe
It would be more than US$150 on Amazon. Amazon prices are higher because they take a 17% cut.
Also, this new meter is much bigger than the BM235, and a lot of the popularity of the BM235 is the small form factor.
>> what are you selling, or want to sell ??
It's not released yet, so I can't tell you.
This new one will have AutoHold ... And the usual auto min,max,avg
I have nothing to share, I don't have the meter yet, they delayed it a bit.
It is a new design that has not been released or announced yet, last I heard it was going through UL testing.
Delayed due to the virus of course, but they have the sample and are going to send to me on the 27th April.
No it's not a Mastech.
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Plenty??
Yes, plenty enough for an unreleased meter for those interested. Normally you'd get no info about new meters before release.
After seeing the 121, it's hard to get too excited.
I don't care if you are excited or not.
From your posts, we know it will cost about $150, may have some sort of UL rating, may have Bluetooth for some additional cost. Will have autohold and the normal min/max and average. We also have some sense of resolution and accuracy.
No such thing as "some sort of UL rating" it's either UL tested or it's not. CAT III 1000, CAT IV 600V is you want to know.
Sorry but your last post seems like click bait at best.
"Click bait" on my own forum? GTFO, someone was talking about looking for a $150 class meter so I pointed out a thread on that specific topic they may not have known about.
If you want to discuss the meter go over to the other thread.
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Plenty??
Yes, plenty enough for an unreleased meter for those interested. Normally you'd get no info about new meters before release.
After seeing the 121, it's hard to get too excited.
I don't care if you are excited or not.
From your posts, we know it will cost about $150, may have some sort of UL rating, may have Bluetooth for some additional cost. Will have autohold and the normal min/max and average. We also have some sense of resolution and accuracy.
No such thing as "some sort of UL rating" it's either UL tested or it's not. CAT III 1000, CAT IV 600V is you want to know.
Sorry but your last post seems like click bait at best.
"Click bait" on my own forum? GTFO, someone was talking about looking for a $150 class meter so I pointed out a thread on that specific topic they may not have known about.
If you want to discuss the meter go over to the other thread.
There is a 61010 safety standard as well as the 61326 EMC standard. Meters that have been certified typically are tested to the safety standard only. The better meters I have looked at have also been certified for EMC. Personally, I have more interest in the EMC side of things than safety.
If/when you get the meter and start releasing basic details, I would be more than happy to join in the discussion. For that matter, I would be willing to put another meter to the test to see how it fairs against the others. For now, there is not enough to comment on.
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Looks like UL does offer EMC cert as well as safety.
https://uk.ul.com/wp-content/uploads/sites/21/2015/03/EMC_in_the_UK.pdf
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There is a 61010 safety standard as well as the 61326 EMC standard. Meters that have been certified typically are tested to the safety standard only. The better meters I have looked at have also been certified for EMC. Personally, I have more interest in the EMC side of things than safety.
It will almost certainly be tested to 61326 EMC
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There is a 61010 safety standard as well as the 61326 EMC standard. Meters that have been certified typically are tested to the safety standard only. The better meters I have looked at have also been certified for EMC. Personally, I have more interest in the EMC side of things than safety.
It will almost certainly be tested to 61326 EMC
Right, ".. may have some sort of UL rating ..."
I don't believe any of the meters I tested were damaged by the little grill starter that were certified to 61326. It's not a guarantee. After seeing Intertek certifying a meter that can't seem to display potentially lethal levels because of what appears to be an autorange problem, I have less confidence in these certs. Hopefully UL is thorough.
BTW, did you ever go back and look at what was breaking down in the 121 when you had your electric fence controller attached to it? Was it the switch contacts for the two series PTCs?
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it's probably a half decent meter for the price.
Likely, CEM make ok meters.
Decided to get one of these (90DM600), as wanted a "cheap" but decent meter that can be used outdoors (snow or rain)...
Build quality is surprisingly good, could say that it is built like a brick dunny... Rotary switch has zero "play", but in turn requires quite a bit force to turn. Unit seems to have been tested by Intertek, while probes have UL markings. Fits a lithium 9V battery just, and seems to come with good quality fuses from the factory (RU markings). Not bad for about $40 (with free shipping).
Quick test showed meter to be up to spec (based on quick measurement results comparison against a GW-Instek GDM-8251A that is a 120,000 count DMM...)
UPDATED: meter is based on DM1106EN chipset pictures of the board found here: https://www.eevblog.com/forum/testgear/amazon-commercial-90dm600-multimeter-hacks/ (https://www.eevblog.com/forum/testgear/amazon-commercial-90dm600-multimeter-hacks/)
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Looking (US) pricing of these 6000 count meters (90DM600 and 90DM610) something is not "right:
90DM600 $41.51 (https://www.amazon.com/AmazonCommercial-Count-Compact-Digital-Multimeter/dp/B07W3BXNMP/ (https://www.amazon.com/AmazonCommercial-Count-Compact-Digital-Multimeter/dp/B07W3BXNMP/))
90DM610 $116.37 (https://www.amazon.com/AmazonCommercial-Count-Digital-Multimeter-CATIV/dp/B07W1BL3RH/ (https://www.amazon.com/AmazonCommercial-Count-Digital-Multimeter-CATIV/dp/B07W1BL3RH/))
Meters appear to be pretty much identical, except "610" has temperature measurement and ships with temperature probe...
Price for 90DM600 seems really good, so perhaps there is pricing "error"....
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[attach=2]
Looking (US) pricing of these 6000 count meters (90DM600 and 90DM610) something is not "right:
90DM600 $41.51 (https://www.amazon.com/AmazonCommercial-Count-Compact-Digital-Multimeter/dp/B07W3BXNMP/ (https://www.amazon.com/AmazonCommercial-Count-Compact-Digital-Multimeter/dp/B07W3BXNMP/))
90DM610 $116.37 (https://www.amazon.com/AmazonCommercial-Count-Digital-Multimeter-CATIV/dp/B07W1BL3RH/ (https://www.amazon.com/AmazonCommercial-Count-Digital-Multimeter-CATIV/dp/B07W1BL3RH/))
Meters appear to be pretty much identical, except "610" has temperature measurement and ships with temperature probe...
Price for 90DM600 seems really good, so perhaps there is pricing "error"....
I got my 90DM610 at the time when it was $52.78. $116.37 is indeed a crazy price when you can get DM600 for $41.51 (and DM910 was $138 at one point...).
I never understood exactly Amazon's price change strategy, but I know for a fact that prices go up and down over time and what they advertise as "reduced price" is irrelevant (they might offer a great $29.87 price allegedly reduced from $39.99 for an item they actually sold yesterday for $19.37).
I am using a third party Firefox plugin that monitors the Amazon prices for (almost?) every single item they sell and it displays it in a chart right on the Amazon page of the item. You can't predict how the price is going to change, but at least you see the price history and if you notice it was much cheaper not long time ago you can wait for the price to go down again. That's how I get most things from Amazon.
The downside is that the items I buy show as ads on totally unrelated web pages I am visiting (or in my Facebook feed), so I guess the third party sells my Amazon shopping/browsing history, but who doesn't these days....
Yes, 90DM610 is a great little meter (and probably 90DM600 too).
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Quite likely being on the cheaper end of quality it is actually a split socket :-- Bottom of the barrel clamp meter you can see the split on one of them in particular.
90DM600 (and 90DM610) seems to have machined sockets (don't see how these could be IP67 rated with split barrel sockets...)
[attach=1]
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Quite likely being on the cheaper end of quality it is actually a split socket :-- Bottom of the barrel clamp meter you can see the split on one of them in particular.
90DM600 (and 90DM610) seems to have machined sockets (don't see how these could be IP67 rated with split barrel sockets...)
(Attachment Link)
What’s so confusing about that? Form the two contacts, then put them in a mold and injection mold the plastic around them.
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90DM600 (and 90DM610) seems to have machined sockets (don't see how these could be IP67 rated with split barrel sockets...)
(Attachment Link)
What’s so confusing about that? Form the two contacts, then put them in a mold and injection mold the plastic around them.
I don't recall seeing IP67 rated devices that don't have rubber (or equivalent) flexible seals between joints, especially between dissimilar materials, where (large) temperature change likely will yield tiny "cracks" allowing water/moisture through....
But maybe that is not issue with IP67 level of water ingress protection (?) It's been long time since I looked into the actual specifications of these ratings, maybe I was thinking IP68 rated stuff....
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At that price range I would rather get a BM857 or BM867 with true data logging to a PC, the same 50000 counts (with 500000 hi-res mode) and quite good reputation, protection and robustness. Yeah, the 90DM890 is begging to be bitched about.
See the attachment: amazon left, BM867 right. Amazon clearly looks better protected to me. Looks ( and sounds from the reviews) very robust. It does not log to a PC but logs on the screen,which in many cases could be preferable.
[attachimg=2]
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At that price range I would rather get a BM857 or BM867 with true data logging to a PC, the same 50000 counts (with 500000 hi-res mode) and quite good reputation, protection and robustness. Yeah, the 90DM890 is begging to be bitched about.
See the attachment: amazon left, BM867 right. Amazon clearly looks better protected to me. Looks ( and sounds from the reviews) very robust. It does not log to a PC but logs on the screen,which in many cases could be preferable.
(Attachment Link)
The 867 (and proabably the 869) has three beefy MOVs, one (perhaps two) PTCs surrounded by shrink plastic, a blast shields near the fuses, 2~3 high voltage resistors in the V range... All that backed up by robustness tests made by one joeqsmith and one report of a dead dodo in the field.
That is a track record that is quite promising.
https://www.eevblog.com/forum/testgear/brymen-bm-867-teardown-pictures/ (https://www.eevblog.com/forum/testgear/brymen-bm-867-teardown-pictures/)
https://www.eevblog.com/forum/repair/brymen-bm869-meets-high-voltage-in-real-world/msg953499/#msg953499 (https://www.eevblog.com/forum/repair/brymen-bm869-meets-high-voltage-in-real-world/msg953499/#msg953499)
The Amazon looks decent (edit, see below), but looks can be deceiving - a while ago I did a review of a Surpeer AV4 that looked quite similar to the Amazon, only to go completely haywire when a somewhat low voltage (about 60V) was applied to anything other than the V scale. Sure, the Amazon may have its place but its value proposition is not great at all.
(edit) Actually, I withdraw that. From a protection standpoint, I don't see any MOV and what it seems to be a PTC it is using the resistor network as the blast shield - a transient and your meter blows a very expensive part.
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... but looks can be deceiving
I've not yet developed the ability to simply look at a meter with my eyes and be able to tell how robust it is. There are a lot of reviewers who claim to have such a talent. Sadly many can't seem to tell the difference between disc capacitors, PTCs or MOVs.
Actually, just had a recent discussion like this:
https://www.eevblog.com/forum/beginners/uni-t-ut-181a-what-am-i-doing-wrong-(big-bandwidth-on-ac-volts-range-)/ (https://www.eevblog.com/forum/beginners/uni-t-ut-181a-what-am-i-doing-wrong-(big-bandwidth-on-ac-volts-range-)/)
I can run the Amazon meter if people want to see it but I have not ordered anything for the last few month as I see no reason to put a driver at risk for my hobby. So you would have to wait.
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... but looks can be deceiving
I've not yet developed the ability to simply look at a meter with my eyes and be able to tell how robust it is. There are a lot of reviewers who claim to have such a talent. Sadly many can't seem to tell the difference between disc capacitors, PTCs or MOVs.
Actually, just had a recent discussion like this:
https://www.eevblog.com/forum/beginners/uni-t-ut-181a-what-am-i-doing-wrong-(big-bandwidth-on-ac-volts-range-)/ (https://www.eevblog.com/forum/beginners/uni-t-ut-181a-what-am-i-doing-wrong-(big-bandwidth-on-ac-volts-range-)/)
I can run the Amazon meter if people want to see it but I have not ordered anything for the last few month as I see no reason to put a driver at risk for my hobby. So you would have to wait.
If you look with more attention you can see clearly that in photo of a UNI-T there are in left down side MOVS (varistors) and PTC(Termistors) . These was meant to be part of input protection circuit . From here was start the discussion , that UNI-T 181A lack input protection .
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Actually, what Evava wrote was:
...
Fluke vs UNI-T duel is presumably caused by input protection circuit, which lacks on UNI-T
...
I took this to mean deficient or inadequate, which it most certainly is. You then start in with the assumption that his statement meant there were no components in the meter that were part of this circuitry and proceeded to argue that point and continue to do so.
From a protection standpoint, I would say every meter I have looked at has some level of protection circuitry (again, I am not referring to safety). Maybe it's just a current limiting resistor or maybe it has 6 MOVs. My tests don't care what parts are sprinkled into a design. It only cares how they all work together. We have seen time and time again that these design by part sprinkling may at times look impressive but will fail miserably at very low levels.
Many reviews will open up the meter and say something like look at all that protection... MOVs!! (while pointing at caps) PTCs!! (while pointing at MOVs) .... That's a five star meter!! You are impressed with the pictures of the UT181A. Again, so be it. But I ran these test to see how they actually hold up, not to provide my opinion on how I feel they will hold up based on what they look like. As I have explained many times, but sadly it doesn't sink in, that the 181A could use some improvement in the layout. It should have been caught in the design review. It should have been caught when Intertek subjected it to the 61326 standards and approved it.
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Actually, what Evava wrote was:
...
Fluke vs UNI-T duel is presumably caused by input protection circuit, which lacks on UNI-T
...
I took this to mean deficient or inadequate, which it most certainly is.
You should have written this in your first post in that thread and I would have considered ok .
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I noticed this in the manual for the 90DM600/610
AC voltage bandwidth:
45 Hz to 1 kHz (sinusoidal);
50/60 Hz (all waves).
That seems a bit odd.
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Hey, would you go for the Amazon 90DM150 for some basic DC stuff its just 25$ here.
Or is there anything reasonable that is better in the 30$-50$ range that would make sense to spend more as the maximum I will be doing is check caps and resistors and do some basic voltage and current measurements on my DC cars.
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with resolution 20000 or 22000 it would be the most universal , sometimes you really need to see it, like battery discharge 12.000 to 11.999 or so ... 40000 - kinda unless on the cheapest side HP770D
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I just noticed Amazon Commercial axed their entire multimeter line up, and no longer have the CEM store. One expensive model 90DM890 remains USD $290. The products were on the website March 2022.
Ahh the politics of multimeters.
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They also have a couple of clamp meters in their Scientific & Industrial section. The one for under $40 seems like a bargain.
Good to see another 6502 fan over here.
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90DM890 is available on Amazon.es at 117 E.
https://www.amazon.es/gp/product/B083V7S3ZC/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1 (https://www.amazon.es/gp/product/B083V7S3ZC/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1)
Sometimes there are promos at half of the price on the other sites in EU. I didn't checked US or CA.
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90DM890 is now 72$ on amazon.com. 213.20$ or 75% rebate :D
https://www.amazon.com/AmazonCommercial-Heavy-Digital-Multimeter-Display/dp/B07VX431NK (https://www.amazon.com/AmazonCommercial-Heavy-Digital-Multimeter-Display/dp/B07VX431NK)
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90DM890 is now 72$ on amazon.com. 213.20$ or 75% rebate :D
https://www.amazon.com/AmazonCommercial-Heavy-Digital-Multimeter-Display/dp/B07VX431NK (https://www.amazon.com/AmazonCommercial-Heavy-Digital-Multimeter-Display/dp/B07VX431NK)
Yup, can confirm, I snatched one ! It seems like they are destocking and they might no longer be available after that, seeing what happened to the rest of their multimeter line.
50000 points, data logging, some graphing features at $72, definitely worth it !
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Decent price for the specs.
Is the battery a standard battery? It would be shame for it to go dead a few years down the road and then not be replaceable.
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Decent price for the specs.
Is the battery a standard battery? It would be shame for it to go dead a few years down the road and then not be replaceable.
The specsheet says a NEDA 1604 battery, so it should be a standard rechargeable 9V battery.
Just looked at a disassembly video and it look like a custom battery.
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This is the battery.
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It's gone!
Currently unavailable. At this price was a real bargain.
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This is the battery.
So, it looks like that battery has multiple source manufacturers. It may be around for a while.
I missed out .. you snooze, you loose.
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So, it looks like that battery has multiple source manufacturers. It may be around for a while.
Indeed. This battery seem that it is used also in other CEM products.
Hope it will be still available when we need it :) .
https://www.aliexpress.com/item/1005003444414839.html (https://www.aliexpress.com/item/1005003444414839.html)
https://www.batteries4pro.com/en/Tooling/measuring-device/3,19148-74v-12ah-li-ion-battery-for-cem-particle-counter-dt-9880-4894128168553.html (https://www.batteries4pro.com/en/Tooling/measuring-device/3,19148-74v-12ah-li-ion-battery-for-cem-particle-counter-dt-9880-4894128168553.html)
https://www.amazon.ca/PT603450-2S-Replacement-DT-9881M-DT-9880M-DT-9883M/dp/B09JFSPVMZ (https://www.amazon.ca/PT603450-2S-Replacement-DT-9881M-DT-9880M-DT-9883M/dp/B09JFSPVMZ)
https://www.walmart.com/ip/Synergy-Digital-Equipment-Battery-Compatible-CEM-PT603450-2S-Equipment-Li-ion-7-4V-1200mAh-Ultra-High-Capacity-Replacement-Battery/871799700 (https://www.walmart.com/ip/Synergy-Digital-Equipment-Battery-Compatible-CEM-PT603450-2S-Equipment-Li-ion-7-4V-1200mAh-Ultra-High-Capacity-Replacement-Battery/871799700)
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Small detail about the 90DM890, the Bluethooth module is missing and the option is not in the setup menu. So, there's no way to connect to meter to phone or PC.
(https://www.eevblog.com/forum/testgear/amazon-do-multimeters-now/?action=dlattach;attach=1617955;image)
(https://www.eevblog.com/forum/testgear/amazon-do-multimeters-now/?action=dlattach;attach=1617961;image)
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DMM 90DM890 does not advertise bluetooth connection.
The original (CEM DT989) and the Peaktech P3440 have bluetooth connection.
So no BT, no IR, no TFcard for 90DM890.
Instead you can realtime plot the trend on device screen, which is a rare feature. The others meters need to be connected to a PC to do that. They can log (record) values and they can plot trending only on the end of the recordng. This meter also have recording function, along with graph (realtime plot).
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For 72 bucks, it's certainly "bang for the buck" and if you're in the market for a new decent meter, it seemed like a steal for that price.
I was quite close to jumping on this deal, like a week back at that 72 USD price, as there suddenly out of the blue was 1 unit left in stock (from otherwise being outsold) and with a fair shipping cost to Denmark +14USD (EU) .-- and a notice about no extra VAT or tariffs at delivery to Denmark (I highly doubt that)
and had it in my basket, and almost finalized/paid - but it does seem to add VAT (at least some estimated) and the final price seems to summon to around 109 USD, so quite a bit more. (+50%)
Though' after going through a few reviews and the fact that it seemed kind of slow to get a reading, and I was not even sure if it were a handicapped downgraded version where certain features, like Bluetooth, etc, were removed
I came to my senses - and if I really need yet another common multimeter, that does more or less the same thing.
- the 50k count and the onscreen graphing appealed to me and a cat-rating that seems loyal, but all my use cases is mains (230v) or low DC.
Decided to pass on it, and instead made an order for a Pico 4 VR, to try the world of this VR that some people seem to be fond of, as other parts of the household/family can also try that..
at 72 bucks for US residents for 90DM890, it was certainly a solid purchase, even with the lack of Bluetooth etc..but that wireless feature is pretty nice to have, though not sure how well implemented it is with the org. CEM BT app which I recall were some "of the shelf third-party app" that is being used under quite a few other brands.
2016 - 38 USD Owon 35series meter is using a somewhat halfbaked-app, though the update rate is pretty fast with its BLE signal with 2 or 3 times update per second // https://tinyurl.com/49v4avcu
and kind of nice you can graph out numerous graphs in different colors to compare values..but the X-Y interaction leaves a lot to be desired on that Owon app, though still a shame they have removed the Bluetooth-chip / UI-interface for the Amazon 90DC890 variant
Judging by Youtube videos about the Bluetooth app on these relative high-end CEMs' it's using an app called Meterbox BLE, which seems way worse than even Owon's old BLE app, so your not missing a lot, not having that BT module...
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Hello.. looking to buy my first multimeter and i am between this (or rather similar 90dm610) and aneng 870 or 8008.which one would you recommend for a beginner. I might need to measure mains. so I am looking something safe for maximum 40-50euro.any other multimeter to recommend? thank you.
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I personally avoid purchasing products made in China whenever possible ............
And you would happily buy Japanese or German ?
We each have a different perspective based on experience, nationality, memory of past injustices and national pride.
:-+ :-+ :-+
Mine's French after they sunk the Rainbow Warrior while tied up at port in Auckland......wars have been started over less !
Do you have the Exocet model? (joking of course).
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Small detail about the 90DM890, the Bluethooth module is missing and the option is not in the setup menu. So, there's no way to connect to meter to phone or PC.
(https://www.eevblog.com/forum/testgear/amazon-do-multimeters-now/?action=dlattach;attach=1617961;image)
Why is there glue on the protection diodes?
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Why is there glue on the protection diodes?
To stick the electrons in.
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Why is there glue on the protection diodes?
They ran out of solder?
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Why is there glue on the protection diodes?
Cheap corona dope substitute ?
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Small detail about the 90DM890, the Bluethooth module is missing and the option is not in the setup menu. So, there's no way to connect to meter to phone or PC.
To compare against my RND 355-00010 (also a CEM DT-989 twin):
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Small detail about the 90DM890, the Bluethooth module is missing and the option is not in the setup menu. So, there's no way to connect to meter to phone or PC.
To compare against my RND 355-00010 (also a CEM DT-989 twin):
I wonder if this one is made by CEM too. The board is somewhat similar but clearly not the same. Can't find any reference to DT-9589. Maybe a clone ?
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Talking about the Amazon 90DM890 (CEM DT-989), if someone is looking for the password for the calibration menu and calibration procedures, poke me. I was able to get my hands on everything.
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Small detail about the 90DM890, the Bluethooth module is missing and the option is not in the setup menu. So, there's no way to connect to meter to phone or PC.
(https://www.eevblog.com/forum/testgear/amazon-do-multimeters-now/?action=dlattach;attach=1617961;image)
Why is there glue on the protection diodes?
The diodes look like the clamping diodes for the current ranges. With overcurrent these diodes can run quite hot - worst case this may be enough to unsolder them, which would be bad. They are supposed to fail (if at all) short, not open. The glue may be there to keep the diodes in place even of the solder gets soft. The part where the glue is applied is a connection anyway. So it would not be so bad as the glue later on turns a bit conductive when old.
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I have one of these but the LCD is not quite right:
(https://i.imgur.com/lXdbNEfb.jpg)
Figured I would open it up one day and reseat a cable and all would be well but it is not a reseatable cable:
(https://i.imgur.com/o9HqC13b.jpg)
The nearest pair of contacts are blobbed together but I don't think it could be that, could it?
(https://i.imgur.com/ZyYDQgI.jpg)
Anyone know what the LCD is? No markings. I might replace it if it is cheap.
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The nearest pair of contacts are blobbed together but I don't think it could be that, could it?
Check if the blob has continuity to ground; that might be on purpose. Or a big sloppy mistake. 🤷
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Dave did a video a couple years ago about why pins might be intentionally shorted (24 minute video!) . Might help you determine if that's the case here.
https://www.youtube.com/watch?v=QrYYGS0uZlU (https://www.youtube.com/watch?v=QrYYGS0uZlU)