Author Topic: New TRMS Uni-T UT139C DMM is available now (Read 144238 times)

Kbird · « **Reply #200 on:** October 29, 2018, 12:10:21 am »

Thanks for the Link Carnage

*** looks like I was right about the initial 1.8v+ being too high (Over 3.6v total) when new....

However I am unsure if the 139C has the same limitation?

KB.

carnage · « **Reply #201 on:** October 29, 2018, 01:55:53 pm »

Can it cause any damage to the meter if I use the Energizer Ultimate Lithium?

Does the meter has any protection if the batteries has a higher voltage than what it call for?

Kbird · « **Reply #202 on:** October 29, 2018, 06:27:47 pm »

Quote from: carnage on October 29, 2018, 01:55:53 pm

Can it cause any damage to the meter if I use the Energizer Ultimate Lithium?

Does the meter has any protection if the batteries has a higher voltage than what it call for?

I don't know sorry and as far as I have read the Manual does not mention Over-voltage on the Battery Power at all. ( may have missed it?)

Lower Battery Pwr warning light is 2.4v and the Meter will not work below 2.2v ( backlight may not work below 2.6v or be dim)

carnage · « **Reply #203 on:** October 30, 2018, 11:34:35 am »

Will the Eneloop Pro work or any NiMH at 1.2V?

What are you using for batteries in your Uni-T UT139C?

Kbird · « **Reply #204 on:** October 30, 2018, 06:09:51 pm »

Quote from: carnage on October 30, 2018, 11:34:35 am

Will the Eneloop Pro work or any NiMH at 1.2V?

What are you using for batteries in your Uni-T UT139C?

Just standard AA Energizer currently , also use the Duracell AA

I have had issues over the years with NiMh 1.2v cells in different devices eg Camera gear etc , so I avoid them nowadays. I do have some 1.5v+ Pure Energy Rechargables but was worried about leakage as the Batts sit along time in a Meter so I didn't use them.

According to the Specs at 2.4v it will work but I am not sure if accuracy is effect as it turns off at 2.2v according to the Specs.

Perhaps try emailing Uni-T and ask for more details especially the Upper limit and if you can use the 1.8v Lithiums...

KB.

carnage · « **Reply #205 on:** October 30, 2018, 10:31:40 pm »

Quote from: Kbird on October 30, 2018, 06:09:51 pm

Quote from: carnage on October 30, 2018, 11:34:35 am
Will the Eneloop Pro work or any NiMH at 1.2V?

What are you using for batteries in your Uni-T UT139C?

Just standard AA Energizer currently , also use the Duracell AA

I have had issues over the years with NiMh 1.2v cells in different devices eg Camera gear etc , so I avoid them nowadays. I do have some 1.5v+ Pure Energy Rechargables but was worried about leakage as the Batts sit along time in a Meter so I didn't use them.

According to the Specs at 2.4v it will work but I am not sure if accuracy is effect as it turns off at 2.2v according to the Specs.

Perhaps try emailing Uni-T and ask for more details especially the Upper limit and if you can use the 1.8v Lithiums...

KB.

I have the Energizer Max I probably going to use if I can't find anything else to use. I had to many Duracell leak in my devices to use them.

Look like my Eneloops aren't going to work.

I tried emailing Uni-T twice with no reply.

I also tried emailing the seller, I'm just waiting for a reply.

Is there a Uni-T in the U.S.?

Kbird · « **Reply #206 on:** October 30, 2018, 10:45:43 pm »

Not as far as I know , there is a Nth American Sales link , maybe worth a try?

Neo Chen - North/South America & Australia

Tel: (86-769) 8572 3888-306

Email: neo@uni-trend.com.cn

carnage · « **Reply #207 on:** October 30, 2018, 11:32:40 pm »

Quote from: Kbird on October 30, 2018, 10:45:43 pm

Not as far as I know , there is a Nth American Sales link , maybe worth a try?

Neo Chen - North/South America & Australia

Tel: (86-769) 8572 3888-306

Email: neo@uni-trend.com.cn

I just sent him a email.

Thanks for all of the replies! I'll let you know what he said if I get a reply.

carnage · « **Reply #208 on:** October 31, 2018, 11:35:36 am »

I got a reply from the seller. He said to use Zinc Carbon batteries.

I had to Google Zinc Carbon batteries to see what it is and if it available.

Does Zinc Carbon have or hold more power than alkaline and do they leak?

HKJ · « **Reply #209 on:** October 31, 2018, 11:50:17 am »

Quote from: carnage on October 31, 2018, 11:35:36 am

Does Zinc Carbon have or hold more power than alkaline and do they leak?

Zinc Carbon is about 1/3 the energy of Alkaline and cannot deliver very high power, I have published a few test of them.
They are worse than alkaline with leaks.

carnage · « **Reply #210 on:** November 01, 2018, 12:08:58 pm »

Quote from: HKJ on October 31, 2018, 11:50:17 am

Quote from: carnage on October 31, 2018, 11:35:36 am
Does Zinc Carbon have or hold more power than alkaline and do they leak?

Zinc Carbon is about 1/3 the energy of Alkaline and cannot deliver very high power, I have published a few test of them.
They are worse than alkaline with leaks.

Thanks for the reply HKJ!

Do you think it would be safe to try Energizer Ultimate Lithium in the UT139C without any issue? Like shorting out something.

HKJ · « **Reply #211 on:** November 01, 2018, 12:16:40 pm »

Quote from: carnage on November 01, 2018, 12:08:58 pm

Do you think it would be safe to try Energizer Ultimate Lithium in the UT139C without any issue? Like shorting out something.

I would expect so, the DMM chip is rated for 3.6V operating and 4V maximum.

carnage · « **Reply #212 on:** November 02, 2018, 10:32:58 am »

Quote from: HKJ on November 01, 2018, 12:16:40 pm

Quote from: carnage on November 01, 2018, 12:08:58 pm
Do you think it would be safe to try Energizer Ultimate Lithium in the UT139C without any issue? Like shorting out something.

I would expect so, the DMM chip is rated for 3.6V operating and 4V maximum.

Thanks for the reply HKJ!

I'm going to get a pack of Ultimate Lithium.

Kbird · « **Reply #213 on:** November 02, 2018, 04:16:12 pm »

Quote from: carnage on November 02, 2018, 10:32:58 am

Quote from: HKJ on November 01, 2018, 12:16:40 pm
Quote from: carnage on November 01, 2018, 12:08:58 pm
Do you think it would be safe to try Energizer Ultimate Lithium in the UT139C without any issue? Like shorting out something.

I would expect so, the DMM chip is rated for 3.6V operating and 4V maximum.

Thanks for the reply HKJ!

I'm going to get a pack of Ultimate Lithium.

If you have the same issue as the Brymen , then run them down to 1.6v in a flashlight and they should be fine , fresh my last pact was 1.82 or higher.

Post back please and let us know how it goes, thx.

KB.

soren · « **Reply #214 on:** March 11, 2019, 03:54:21 pm »

An unbranded version of the UT139C is currently on sale via Amazon Europe for EUR 10.99.

https://www.amazon.de/dp/B077ZQS94K
https://www.amazon.fr/dp/B077ZQS94K
https://www.amazon.es/dp/B077ZQS94K

I just received one and everything including probes and manual appear to be exactly like with the UT139C, except without the Uni-T name. If it's a clone, it is an extremely faithful one.

rsjsouza · « **Reply #215 on:** March 11, 2019, 06:26:47 pm »

US$16.99 at Amazon.com with prime free shipping
https://www.amazon.com/Multimeter-Voltmeter-Ohmmeter-Temperature-Measurement/dp/B077ZQ2Z5S

stj · « **Reply #216 on:** March 12, 2019, 01:24:57 am »

i dont have a 139c, but if it uses the 0660 chip like the 210e or the aneng meters then it will run on eneloops etc.
i have been using ladda's in my 210e and 2 aneng's for over a year without problems.

TheNewLab · « **Reply #217 on:** March 12, 2019, 02:03:07 am »

hmmmm, interesting the US Amazon shows $22 USD
https://www.amazon.com/dp/B0194VGLFS?aaxitk=U1Y6brI3NcyHLqKAr8U4cA&pd_rd_i=B0194VGLFS&pf_rd_p=e037c154-e093-48a4-b127-477e5e294e3f&hsa_cr_id=7814473900601&sb-ci-n=productDescription&sb-ci-v=Proster%20PSTTL334%20Digital%20Multimeter%206000%20Counts%20TRMS%20Auto%20Range%20NCV%20Detector%20DC%20AC%20Voltage%20Current%20Meter%20Temperature%20Capacitance%20Diode%20and%20Continuity%20Tester%2C%20Manual&sb-ci-a=B0194VGLFS

rsjsouza · « **Reply #218 on:** March 12, 2019, 03:17:47 am »

This is a completely different meter.

rsjsouza · « **Reply #219 on:** March 12, 2019, 04:37:59 pm »

Wow... Amazon delivered it in about 24h. I wonder if this was just around the corner from here.

It really looks the real deal. It even has the Intertek listing number, although on a sticker and not indelllible.

I did not open it yet. Will do at the first opportunity.

hli · « **Reply #220 on:** March 14, 2019, 08:11:30 pm »

Quote from: soren on March 11, 2019, 03:54:21 pm

... appear to be exactly like with the UT139C, except without the Uni-T name. If it's a clone, it is an extremely faithful one.

Got mine from the german Amazon - 10.99 EUR delivered. Opened it up, and the PCB says 'UT139C' (look at the right side in yout photo). Compared to my older ones the PCB looks a little bit different. From the silkscrren it looks the old ones are at PCB revision -1 and the new one is at -4.
When I look at the product page now its at 39.99 EUR. So it seems to be a mistake on the sellers part...

rsjsouza · « **Reply #221 on:** March 14, 2019, 08:17:21 pm »

Quote from: hli on March 14, 2019, 08:11:30 pm

Quote from: soren on March 11, 2019, 03:54:21 pm
... appear to be exactly like with the UT139C, except without the Uni-T name. If it's a clone, it is an extremely faithful one.
Got mine from the german Amazon - 10.99 EUR delivered. Opened it up, and the PCB says 'UT139C' (look at the right side in yout photo). Compared to my older ones the PCB looks a little bit different. From the silkscrren it looks the old ones are at PCB revision -1 and the new one is at -4.
When I look at the product page now its at 39.99 EUR. So it seems to be a mistake on the sellers part...

I opened mine and can attest it is a UT139C - same markings as yours, good input protection and excellent build quality. I even connected its inputs (ohm, continuity, diode, temperature, frequency) to a high voltage source and the meter did not even blink - a hint that the input protection is doing its work in protecting the meter.

Amazon US still has it for US$16.99 with Free shipping.

rogbese · « **Reply #222 on:** October 13, 2020, 11:43:39 am »

Hello!
Sorry to dredge up an old post. I just got this meter after reading thru this and was wondering on this new revision 5 board. The main chip is conned(?) and the location of the interface pins is different. I also notice an led? I'm thinking maybe a shared board? From others' experience, how good is this dmm in 2020 compared to the ut89x for bench work and basic home work?

Fretec · « **Reply #223 on:** October 13, 2020, 03:22:44 pm »

Quote from: carnage on October 31, 2018, 11:35:36 am

I got a reply from the seller. He said to use Zinc Carbon batteries.

I had to Google Zinc Carbon batteries to see what it is and if it available.

Does Zinc Carbon have or hold more power than alkaline and do they leak?

Zinc Carbon, really? I wonder where he got this information from... This is ancient battery technology far inferior to alcaline (and everything else made these days).
Not sure if you can even still buy them, have not seen any for a long time.


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Author Topic: New TRMS Uni-T UT139C DMM is available now (Read 144238 times)

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