Uni-T launches the UT117C multimeter

[EEVblog]

NO.
UT117C has 0.3% DCV accuracy. https://meters.uni-trend.com/product/ut117c/
It is stupid high resolution, 0.3% DCV meter. Well build, with couple of nice features like BT. Extra digit or two does not make it more accurate.

0.3% 60,000 count meter, seriously?
It's marketed at "High Precision", so seems like the wrong choice of wording here, it should be "High Resolution"

[EEVblog]

No mA/uA range is limiting.
Basically marketing a high resolution electrican meter.

[makz]

No mA/uA range is limiting.
Basically marketing a high resolution electrican meter.

review is not planned?

[EEVblog]

review is not planned?

Without a mA/uA range I wouldn't even consider it an electronics class multimeter. So no review from me, I'm not that interested in electrical targeted stuff.

[sonpul]

0.3% 60,000 count meter, seriously?
[/quote]

Nobody confirmed 0.3%. I insist that this is a mistake in the description and many have already confirmed that the characteristics on paper have deteriorated by more than 10 times. Maybe in order not to spoil the sales of UT61E+.

[EEVblog]

Inside

[EEVblog]

Nobody confirmed 0.3%. I insist that this is a mistake in the description and many have already confirmed that the characteristics on paper have deteriorated by more than 10 times. Maybe in order not to spoil the sales of UT61E+.

It's not a mistake, the accuracy spec is primarily determiend by the voltage reference used.
This a 60,000 count meter with 6,000 count meter reference.
The fact that it's calibrated to be way better than 0.3% is not the point, the reference will be a cheapie. Will probably vary a lot with temp.

[sonpul]

Maybe. But UT117C is built on the basis of HY3131 which is 50000 counts. I saw the same in table Owon for 55000. On the same is made UEI EEvblog UE121GV. Is he 6000? And declared for 50000.

As for thermostability. My BM789 for how much I know, not the best thermostability.

[iMo]

The resolution of the chip used is one thing, the reality the other. I own 2 meters, one is based on LD120+LD121 which is 20000 (aprox 40y old), and the other one is based on MAX134 which is 40000 (30y old). The reality is the first one is implemented as 2000 and the second one as 4000 max resolution. It seems the designers decided to show a stable reading instead of more digits with noisy last digit. And the reference used is pretty important indication as well - for 60000 (almost 16bit) you would need something like LM399 to make the meter happy..

[geb]

UT117C is built on the basis of HY3131 which is 50000 counts

What iMo said. 

A lot of popular lower-end meters for a few years have been 6000, 9999, 19999 counts, all seemingly based on HY12P65 single-chip solution which is officially 5000 counts but has a 19-bit ADC. It's possible to get more out of the chips. It's more a question of the limits/quality of the ADC, voltage reference, ...

I think UT117C shows promise for my day-to-day use. It's more responsive, the LCD contrast is better, and its readings are more stable, than my RM303 and HP-770D. It sounds like it has better handling of resistance ranges than HP-770D as well. EEVBlog's point about the lack of current ranges is valid but I usually need to casually check 1-500ma and I have other meters for uA. And I see more protection on its board than in a ZT-102 so I'm a little more comfortable reaching for it to test mains voltage. I'd like to see a formal review covering its protection.

[gamalot]

Wonder what will be the real price. Now it costs 130 euro/600 PLN - I think APPA/BRYMEN/SANWA are not far away.

There are a couple of vendors selling it for $73 USD:

https://www.aliexpress.us/item/3256805457726202.html

https://www.aliexpress.us/item/3256805466430596.html

I just placed an order, 65 US dollars ship to Australia.

[iMo]

I've almost pulled the trigger, but the message on the mA/uA ranges stopped me.
So what is the "resolution" on the DC current then?
PS: and the DC volts "resolution"?

[geb]

I paid US$74 at Aliexpress. The same store has $72 now, and there are $64 listings in the "Related items" section.

The lowest DC current range is 6.0000A, 100uA resolution. The lowest DC voltage range is 600.00mV, resolution 10uV. I didn't check mine to see how far off these are.

Belated followup to makz:

six digits off - 5.0006 instead of 5V? I understand correctly?

Yes, basically 5.0006, 500.06 mV, etc. And reading a 0.01% resistor goes in the other direction, 50K is 49.995 and so on. And 1.0V and 10K are off by a smaller amount, and so on up to 5.0V and 50K. My takeaways from that were... 1) I'm hopeful that the readings across each scale will have better linearity than my other 4+ digit cheap meters. 2) Not an offset issue (FYI 0V is 0.0000V). 3) They might have copied the calibration EEPROM from a known-good calibrated unit, and this unit's voltage reference is off by '6'.

[iMo]

The lowest 6.0000A AC/DC current range will be the show stopper for many, I am afraid..
Having it 600.00mA I would order 2-3 for the $65-75/unit price..

[gamalot]

I found the picture on a Chinese website "数码之家", the voltage reference is MAX6190

https://www.mydigit.cn/forum.php?mod=viewthread&tid=401149&highlight=UT117

[makz]

Belated followup to makz:

six digits off - 5.0006 instead of 5V? I understand correctly?

Yes, basically 5.0006, 500.06 mV, etc. And reading a 0.01% resistor goes in the other direction, 50K is 49.995 and so on. And 1.0V and 10K are off by a smaller amount, and so on up to 5.0V and 50K. My takeaways from that were... 1) I'm hopeful that the readings across each scale will have better linearity than my other 4+ digit cheap meters. 2) Not an offset issue (FYI 0V is 0.0000V). 3) They might have copied the calibration EEPROM from a known-good calibrated unit, and this unit's voltage reference is off by '6'.

In my opinion, the accuracy of your multimeter is very good. mine is much worse

[BILLPOD]

Yes, basically 5.0006, 500.06 mV, etc. And reading a 0.01% resistor goes in the other direction, 50K is 49.995 and so on. And 1.0V and 10K are off by a smaller amount, and so on up to 5.0V and 50K. My takeaways from that were... 1) I'm hopeful that the readings across each scale will have better linearity than my other 4+ digit cheap meters. 2) Not an offset issue (FYI 0V is 0.0000V). 3) They might have copied the calibration EEPROM from a known-good calibrated unit, and this unit's voltage reference is off by '6'.

     My results are similar.  My main 'Likes' are the strap w/magnet, and the blue tooth, but I wish the software worked on a windows laptop.
     The manual says the current clamp can read DC current, but I couldn't get any DC reading. And I could get no AC amperage readings below 1.5 ADC.   Also, the current clamp, (UT-CS06A), works with some of my other DMMs, in mV mode, like my Brymen 869S and Fluke 189.
     I paid $72 USD for just the meter, which took exactly 20 days to my doorstep, but I see it adv. now for $64.
     Overall, I'm happy with the resolution and accuracy, and I'm glad I got it

[ledtester]

     My results are similar.  My main 'Likes' are the strap w/magnet, and the blue tooth, but I wish the software worked on a windows laptop.

You might be able to run the Android app on a Windows system:

https://www.pcmag.com/how-to/3-free-ways-to-run-android-apps-on-your-pc

[EEVblog]

Maybe. But UT117C is built on the basis of HY3131 which is 50000 counts. I saw the same in table Owon for 55000. On the same is made UEI EEvblog UE121GV. Is he 6000? And declared for 50000.

The 121GW is 50,000 count, as per the HY3131 spec.
The accuracy and stability is primarily determined by the external voltage used, and the external voltage divider, not the chipset.

[EEVblog]

I found the picture on a Chinese website "数码之家", the voltage reference is MAX6190

That's the best A version with 5ppm tempco. This should be pretty good.
Perhaps they have divider drift issues or something.

[makz]

can someone upload a dump of EEPROM P24C02A?

[geb]

can someone upload a dump of EEPROM P24C02A?

Ok! 

[RAPo]

Exactly what I got.
The mousepad is relegated to the dust bin.

Mine just arrived -- order was placed on the 12th so technically it took 15 days.

The package was wrapped in Uni-T tape so it stands to reason it came directly from Uni-T -- i.e. the Aliexpress seller simply placed a drop-ship order.

My bundle of the UT117C + clamp meter also came with an oversized mouse pad -- not sure what I'm going to use it for.

[Jon.C]

the problem is that Aliexpress has already doubled the price, I saw it at 61 € shipping to Spain

[gamalot]

with Fluke 117