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Products => Test Equipment => Topic started by: jayjr1105 on January 28, 2019, 02:30:52 am

Title: Anyone test out new UEI Meters?
Post by: jayjr1105 on January 28, 2019, 02:30:52 am
On paper they look really good.  Missing a Rel function but otherwise they look nice.

DM505 and DM515 (TRMS)

Maybe they can be a part of an updated $100 shootout.  It's getting close to 10 years since it was done last.  wink wink Dave.
Title: Re: Anyone test out new UEI Meters?
Post by: jayjr1105 on February 14, 2019, 06:41:00 pm
So I had a UEI/UTLDM2 that just stopped working out of nowhere.  I sent it back to UEI because it was under a year old and they said it was dead and un-repairable.  Good guy UEI gave me the option to get one of the new DM5xx models in replacement only paying a fraction of the cost of one new!  I just received the DM515 today and only took it out of the box for a few minutes before going back to work.  So far I can say that it's built extremely well, takes 2xAA batteries and is VERY fast in when not in auto mode (AC and DC share a switch position).  I'll try to get a quick video review out soon.  Don't expect Dave Jones or Joe Smith in depth review, but I can test all the functions with the tools I have.

Title: Re: Anyone test out new UEI Meters?
Post by: rsjsouza on February 14, 2019, 08:46:45 pm
That is quite interesting that UEi has a renewed product line - if I recall correctly, about 1 or 2 years ago their DMM product line was empty.

One thing that ticked me in the wrong direction is their "Sale Sheet" (https://www.ueitest.com/sites/default/files/product-resources/DM525_SELL_L457.pdf), where they compare the DM525 (https://www.ueitest.com/products/dm525) with the Fluke 179 (https://www.fluke.com/en-us/product/electrical-testing/digital-multimeters/fluke-179). Lots of incorrect statements against the 179, such as CAT ratings, mA range and Warranty.

To me there is no excuse for such blatant mistakes, given the 179 Specifications tab contradicts all these. 
Title: Re: Anyone test out new UEI Meters?
Post by: jayjr1105 on February 14, 2019, 09:07:04 pm
Yeah, blame the marketing dept I guess.  They don't even have to be shady.  The DM525 is half the price.  All it has to do is get pretty close to the 179 on paper and not completely crap the bed irl to compete.
Title: Re: Anyone test out new UEI Meters?
Post by: bc888 on February 14, 2019, 09:14:30 pm

Isn't UEI making the 121GW Eevblog meter?
Title: Re: Anyone test out new UEI Meters?
Post by: jayjr1105 on February 14, 2019, 09:16:22 pm

Isn't UEI making the 121GW Eevblog meter?

Yep, Brymen made the 1st, the 121GW is indeed UEI.
Title: Re: Anyone test out new UEI Meters?
Post by: joeqsmith on February 15, 2019, 12:38:14 am
Could you please post a few high res pictures of the internals?   I wonder if it needs a shim for the switch to work.  :-DD
Title: Re: Anyone test out new UEI Meters?
Post by: EEVblog on February 15, 2019, 05:58:33 am
Interesting

(https://i.imgur.com/M0kaM7g.png)
Title: Re: Anyone test out new UEI Meters?
Post by: EEVblog on February 15, 2019, 05:59:54 am
They never did come out with another product that used the 121GW case, which they retained rights to do. Maybe still in the works, no idea.
Title: Re: Anyone test out new UEI Meters?
Post by: EEVblog on February 15, 2019, 06:01:59 am
"Designed by us, Made by us".
That would mean made in South Korea by Finest (who UEI now own), same as the 121GW.
Title: Re: Anyone test out new UEI Meters?
Post by: riyadh144 on February 15, 2019, 07:05:12 am
Actually Interesting, it has power factor measurement and bluetooth, I wonder if it has your ucurrent circuit.
Title: Re: Anyone test out new UEI Meters?
Post by: riyadh144 on February 15, 2019, 07:10:22 am
Yep it has your ucurrent, it is essentially the 121GW with no SD card a Watts measurements and no SD card

https://assets.tequipment.net/assets/1/26/Uei_DM525_Data_Sheet.pdf
https://assets.tequipment.net/assets/1/26/Uei_DM525_Manual.pdf
Title: Re: Anyone test out new UEI Meters?
Post by: EEVblog on February 15, 2019, 08:03:17 am
Actually Interesting, it has power factor measurement and bluetooth, I wonder if it has your ucurrent circuit.

Doesn't seem to. 2mV/mA, and the 400mA range is not shared on the A jack like on the 121GW.
And it won't be using the HY3131, or at least not the for power measurement, because that doesn't allow true Watts measurement. Probably explains the higher price than the 121GW.
Don't understand the lack of a secondary display though, I thought that would be a given when you add power measurement.
Title: Re: Anyone test out new UEI Meters?
Post by: jayjr1105 on February 15, 2019, 06:43:56 pm
Some quick shots with a cheapie voltage reference board.  2.5/5/7.5/10

More pics to come and maybe a video.  So far I'm very impressed but it's clearly not as fast as the BM235 or a 2709B.
Title: Re: Anyone test out new UEI Meters?
Post by: alex-sh on February 15, 2019, 06:50:40 pm
@ jayjr1105

What voltage reference did you use please?
Do you have the same voltage ref measured by a 6-1/2 DMM?
Title: Re: Anyone test out new UEI Meters?
Post by: jayjr1105 on February 15, 2019, 06:59:38 pm
Could you please post a few high res pictures of the internals?   I wonder if it needs a shim for the switch to work.  :-DD
Hi rez album of insides by request... https://imgur.com/a/yjC14rm
Title: Re: Anyone test out new UEI Meters?
Post by: jayjr1105 on February 15, 2019, 07:00:32 pm
@ jayjr1105

What voltage reference did you use please?
Do you have the same voltage ref measured by a 6-1/2 DMM?

Just this thing and no, no high end meter to cross reference unfortunately.

https://www.ebay.com/itm/AD584-4-Channel-2-5V-5V-7-5V-10V-High-Precision-Voltage-Reference-Module-QWI/362526259242?hash=item54683fb82a:g:u3AAAOSwhu9cMJS~:rk:1:pf:0 (https://www.ebay.com/itm/AD584-4-Channel-2-5V-5V-7-5V-10V-High-Precision-Voltage-Reference-Module-QWI/362526259242?hash=item54683fb82a:g:u3AAAOSwhu9cMJS~:rk:1:pf:0)
Title: Re: Anyone test out new UEI Meters?
Post by: Fungus on February 15, 2019, 07:07:41 pm
Hi rez album of insides by request... https://imgur.com/a/yjC14rm

Looks like some really hefty input protection.

And I spy a serial port. Time to hook some wires up to it and see what's there.
Title: Re: Anyone test out new UEI Meters?
Post by: joeqsmith on February 15, 2019, 10:57:56 pm
Thanks for taking the time to post those.  If you decide to remove the PCB and switch assembly,  I would like to see the other side as well.   
Title: Re: Anyone test out new UEI Meters?
Post by: jayjr1105 on February 16, 2019, 02:14:55 am
Bear with the crudity of this review and my monotone voice.

https://www.youtube.com/watch?v=MvuBYYui_lo (https://www.youtube.com/watch?v=MvuBYYui_lo)
Title: Re: Anyone test out new UEI Meters?
Post by: EEVblog on February 16, 2019, 10:11:00 am
Some quick shots with a cheapie voltage reference board.  2.5/5/7.5/10
More pics to come and maybe a video.  So far I'm very impressed but it's clearly not as fast as the BM235 or a 2709B.

(https://www.eevblog.com/forum/testgear/anyone-test-out-new-uei-meters/?action=dlattach;attach=653262;image)

Wow, the BM235 digits are already very big, so this display is HUGE. Perhaps a contender for the biggest display digits on the market?
Title: Re: Anyone test out new UEI Meters?
Post by: EEVblog on February 16, 2019, 10:47:00 am
Bear with the crudity of this review and my monotone voice.

"Quick Review" at 30 minutes  :-DD

Sorry, couldn't resist, I wondered what it was like to be on the giving end for a change  ;D
Title: Re: Anyone test out new UEI Meters?
Post by: EEVblog on February 16, 2019, 10:48:09 am
Looks like an identical but larger 121GW case design.
Still using the long battery terminals I see.
HY12P65 chipset

The DM525 would likely be quite different.
Title: Re: Anyone test out new UEI Meters?
Post by: EEVblog on February 16, 2019, 11:04:20 am
Far too easy to hack!
The DM505 is US$80, but the DM515 is $120
Just remove R72 by the looks of it!
The photos are the DM515, so those unpopulated parts wouldn't be needed.

(https://i.imgur.com/e1lfnfI.png)
Title: Re: Anyone test out new UEI Meters?
Post by: EEVblog on February 16, 2019, 11:10:32 am
6mV range DC and AC, wow, don't think I've seen that before.
Title: Re: Anyone test out new UEI Meters?
Post by: chickenHeadKnob on February 16, 2019, 03:12:57 pm
Wow, the BM235 digits are already very big, so this display is HUGE. Perhaps a contender for the biggest display digits on the market?

Past the point of diminishing returns and well into tall-skinny-wrong aspect ratio. They should have employed the extra screen real estate for dual readout/ bargraph
Title: Re: Anyone test out new UEI Meters?
Post by: jayjr1105 on February 16, 2019, 05:11:55 pm
The BM235 Digits are hard to beat.  So crisp while on it's kickstand and looking straight on which is rare.  Sorry Dave, my editing skills are pretty bad.  I just piece it together and upload.  Some day I'll take the time to learn some editing software. 

The hack thing is intriguing.  Seriously, just a surface mount resistor is what separates an $80 and $120?




Title: Re: Anyone test out new UEI Meters?
Post by: joeqsmith on February 16, 2019, 05:26:49 pm
Bear with the crudity of this review and my monotone voice.

Good job with the review and what appears to be your first video.   While I would have liked to have seen the switch contacts, I can understand not wanting to pull it apart. 
Title: Re: Anyone test out new UEI Meters?
Post by: jayjr1105 on February 16, 2019, 08:44:38 pm
Bear with the crudity of this review and my monotone voice.

Good job with the review and what appears to be your first video.   While I would have liked to have seen the switch contacts, I can understand not wanting to pull it apart.

It wasn't too bad.  I hate the tiny self tappers that hold the board in place.  I always feel like I'm going to strip the head or the threads.  Nothing under the LCD, I just peeked since the backlight LEDs are soldered in.
Title: Re: Anyone test out new UEI Meters?
Post by: joeqsmith on February 16, 2019, 09:12:34 pm
Getting closer.  :-DD   Squeeze the two clips and we can see what she looks like.   I would like to see both the wiper contacts, as close as you can get to the tips as well as the contacts on the PCB.   If you have a micrometer or set of calipers, perhaps you would also check the PCB thickness.  I'm just curious how it compares.   It seems like they would try to use common components where possible. 
Title: Re: Anyone test out new UEI Meters?
Post by: jayjr1105 on February 16, 2019, 09:46:58 pm
Getting closer.  :-DD   Squeeze the two clips and we can see what she looks like.   I would like to see both the wiper contacts, as close as you can get to the tips as well as the contacts on the PCB.   If you have a micrometer or set of calipers, perhaps you would also check the PCB thickness.  I'm just curious how it compares.   It seems like they would try to use common components where possible.

Ugh, after all this and I forgot to measure board thickness
Title: Re: Anyone test out new UEI Meters?
Post by: jayjr1105 on February 16, 2019, 11:38:38 pm
Just some other notable differences simply comparing with the BM235.





Title: Re: Anyone test out new UEI Meters?
Post by: gnavigator1007 on February 16, 2019, 11:59:44 pm
I can't think of any other products i've seen where the manufacturer has reused(I'm assuming) the battery compartment from another model like that. Not complaining. Being able to store extra batteries could certainly be useful. Just kinda funny in an age where everything is getting slimmer and slimmer. Wish phone manufactures would do something like this.
Title: Re: Anyone test out new UEI Meters?
Post by: jayjr1105 on February 17, 2019, 12:10:45 am
Being able to store extra batteries could certainly be useful.

You could get creative and wire two more in double parallel for double capacity as well.  :-/O
Title: Re: Anyone test out new UEI Meters?
Post by: joeqsmith on February 17, 2019, 01:04:02 am
I would have expected the same switch contacts to be used as the 121 and maybe they do represent the final design.   They appear not to be plated and have a new dimple design.  Again, thanks for taking it apart and documenting your findings.
Title: Re: Anyone test out new UEI Meters?
Post by: EEVblog on February 17, 2019, 07:08:46 am
I can't think of any other products i've seen where the manufacturer has reused(I'm assuming) the battery compartment from another model like that. Not complaining. Being able to store extra batteries could certainly be useful. Just kinda funny in an age where everything is getting slimmer and slimmer. Wish phone manufactures would do something like this.

There was no point to do that if they had to redo the moulds anyway. It's most likely they have another product that uses the same new case and the 4xAA's. Or maybe they started the project thinking they need the higher voltage but then picks a part that needed only two cells.
Title: Re: Anyone test out new UEI Meters?
Post by: EEVblog on February 17, 2019, 07:09:38 am
Being able to store extra batteries could certainly be useful.
You could get creative and wire two more in double parallel for double capacity as well.  :-/O

Yep, I would have done that. Seems silly to waste that space.
Title: Re: Anyone test out new UEI Meters?
Post by: EEVblog on February 17, 2019, 07:11:01 am
Wow, the BM235 digits are already very big, so this display is HUGE. Perhaps a contender for the biggest display digits on the market?
Past the point of diminishing returns and well into tall-skinny-wrong aspect ratio. They should have employed the extra screen real estate for dual readout/ bargraph

Yep, agreed, the BM235 looks superior.
The Hycon chipset has an LCD driver with limited digits, so they couldn't likely do anything more display wise.
The micro used does not have a LCD driver:
https://www.st.com/en/microcontrollers/stm32l052t6.html (https://www.st.com/en/microcontrollers/stm32l052t6.html)