Good luck for the Fluke 189 . A new variant of the UNI-T 181? Humm maybe they also had review the board layout to supress the ESD fragility on the 3.3V switching internal PSU.
I think uni-t aims for the entry level for newer to electrical / electronics in controlled enviroments, but the uni-t 181A/B it should be beyound that due to it's price range. Ask them for a test
it's possible that if you speak to the right person an UniTrend they may support you with free meters.
it would be worth it to them to both know what needs to be fixed, and to get good reviews to people.
they are watching and learning, look at the fuses & stuff in the newer meters - better than the 20mm glass crap in the early stuff.
They are watching and learning, look at the fuses & stuff in the newer meters - better than the 20mm glass crap in the early stuff.
I'm not sure they learned that from joe's videos.
I think uni-t aims for the entry level for newer to electrical / electronics in controlled enviroments, but the uni-t 181A/B it should be beyound that due to it's price range. Ask them for a test
The UT181 is categorized by them as "Industrial True RMS Multimeters":
http://www.uni-trend.com/productslist.aspx?IntroCateId=1024&ProductsCateID=1024&BaseInfoCateId=1024&cateid=1024&ViewCateID=1024
Yeah that's another issue too and the box also has a electrial board design . but they skipped the IEC related to ESD testing back when joeqsmith tested it.
Their website has some errors, for example the uni-t 204A clamp meter has a MAX mode in the specs section but in reallity is REL mode
it's possible that if you speak to the right person an UniTrend they may support you with free meters.
it would be worth it to them to both know what needs to be fixed, and to get good reviews to people.
they are watching and learning, look at the fuses & stuff in the newer meters - better than the 20mm glass crap in the early stuff.
At the very end of the video, I show the test running real time. That's just five transients. The 189 has ACV, ACmV, DCV, DCmV, Ohms, Capacitance and temperature modes that I run through. So 7 times how ever long that 5 transients took. Then I run + and -, so multiply by 2. That's just one voltage level. The point to all that is even if the meters are free, the time is not.
Some time ago, someone at UNI-T did reach out to me. I think they had a new meter that had the auto dimming back light that they were offering to me to look at. I would be fine with that except I wanted to make it very clear to them what I do on channel and if they sent me the meter, I would run it like any other meter and document the results. They never responded and I can't say I blame them. To date, only Brymen has been so bold to stand behind their products.
When you think about the other brands that have held up so well, they could have some good free advertising but the channel is small and they may see no value in it. I'm fine with it.
I think uni-t aims for the entry level for newer to electrical / electronics in controlled enviroments, but the uni-t 181A/B it should be beyound that due to it's price range. Ask them for a test
The UT181 is categorized by them as "Industrial True RMS Multimeters":
That's what Gossen calls the Ultra as well, while testing at 1V/meter.
The UT181 is categorized by them as "Industrial True RMS Multimeters":
Does anybody still believe them?
Show us the UL certificates, etc.
Yes, not for this particular case... Or for most other cases, although the UT61 variants sold in Europe seem to be ETL listed.
To be honest i bought one uni-t 204A at a local store to read current from solar panels or for higher loads in AC without breaking circuits.
It has ETL and Intertek logo, a good jaw, 3999 counts, temperature and some accuracy
My bad call was i thought it was true RMS acourding to the specs of this website :
https://www.uni-t.cz/en/p/clamp-multimeter-uni-t-ut204aAfter a while i found a post here that stated it was not true RMS and also have confirmed against the BM235 and aneng 8001
. Not the best deal but at least it has done it's work and payed itself.
The UT181 is categorized by them as "Industrial True RMS Multimeters":
Does anybody still believe them?
Show us the UL certificates, etc.
I hope all of the testing I have shown has not caused you to become so cynical.
the low just got lower.
check out the integrated "spark gap" on this brand new DT830!!!
To be honest i bought one uni-t 204A at a local store to read current from solar panels or for higher loads in AC without breaking circuits.
It has ETL and Intertek logo, a good jaw, 3999 counts, temperature and some accuracy
do you know what chipset it uses?
we may be able to "improve" the specs with an eeprom hack.
The UT181 is categorized by them as "Industrial True RMS Multimeters":
Does anybody still believe them?
Show us the UL certificates, etc.
I hope all of the testing I have shown has not caused you to become so cynical.
No worries. I rather have data and testing to have a better ideia of the value for the money, than buying a product that fails in a middle of a work. I have some uni-t's and they are good for learning purposes or CATII usage. But also consider other brands like brymen, amprobe, fluke.
But of course i got surprised when the ut 181a failed and Lol on the pocket meter
To be honest i bought one uni-t 204A at a local store to read current from solar panels or for higher loads in AC without breaking circuits.
It has ETL and Intertek logo, a good jaw, 3999 counts, temperature and some accuracy
do you know what chipset it uses?
we may be able to "improve" the specs with an eeprom hack.
That would do a great idea but after warranty expires. I'll ask uni-t about the specs.
Replaced the supercap in the old Fluke 189 and tested a few different resistors for the lead detection circuit. Then it was back to transient testing the old girl.
https://youtu.be/8t8nkCbYJVc
Resistors roasting on an open board... ♫
why not blow one to hell, then re-list it on EvilBay?
"Fluke 189 for sale, barely used"
("accidentally" neglecting to mention that it had been "used" about 5 minutes before Joe's tests blew it to kingdom come)
why not blow one to hell, then re-list it on EvilBay?
"Fluke 189 for sale, barely used"
("accidentally" neglecting to mention that it had been "used" about 5 minutes before Joe's tests blew it to kingdom come)
"Fluke 189 for sale, calibrated, electrically test pass"
PS.: batteries not included
Resistors roasting on an open board... ♫
The season is coming up.
why not blow one to hell, then re-list it on EvilBay?
"Fluke 189 for sale, barely used"
("accidentally" neglecting to mention that it had been "used" about 5 minutes before Joe's tests blew it to kingdom come)
"Fluke 189 for sale, calibrated, electrically test pass"
PS.: batteries not included
It seems like a pretty tough meter. It may be 18ish years old but still outperforms most of the meters I have looked at.
When I started all this testing, I wouldn't have given you a dollar for a Fluke meter. My disdain for them ran pretty deep.
But I am also data driven and can't deny that they have learned how to make very robust products over the years. Hard to say is they are now on the down swing of that cycle.
I've shown it's fairly easy to design a handheld that will survive some basic low energy transients. I've seen a few people comment about how you can add a few dollars in parts are have a very robust product. It does not always seem to be a cost problem. I've looked at some fairly high priced meters that did not perform very well at all. At some point, the engineers also need to know how to design robust products.
It's very difficult engineering things for transients, as the outcome is destructive - something fails and everybody scratches their heads and guesses what went wrong. It's like an airplane crash.
A Teseq is very expensive. $30K and even more for calibration and upkeep, another $6k for the H/W and F/W upgrades. For something rarely used and seen as a small regulatory hurdle, management doesn't want to put any money into it. Consider selling your transient generator
You do a run and after the explosion, there is no high speed camera footage as to where the breakdown started.
It is quite a clown car for the junior engineers, who are terrified of using the transient generator and later stunned that they have no data or equation to reconsider.
Months go by and the product is late to market, pressure is on. The product has no budget dollars or room for bigger parts and clearances. I could go on and on.
It's mostly a problem of engineers not understanding the safety standards, the high costs with consulting UL/CSA over $400/hr, and the high costs of the test equipment, all to meet a few paragraphs in a safety standard- as the boss sees it.
The flukes are really good and the one i used and like a lot was the 117. They have the formula ( component selection, board layout, rotary switch)to build a robust meter and it is appliable to various types of meters, even the little fluke 101.
Some of the brands take "gidelines" to design products that may meet the expected CAT without certification because that costs money. Here an ut61e Intertek / GS costs 82 Euros or for more 20 euros you can order a brymen BM235 or a fluke 17B+ that has backlight, better fuses, input protection, rotary switch but of course less resolution and no PC connection.
That's a good start with MOT since there is scavanging components in big scale and buying cheap meters is a good mix for testing it's robustness as almost one time operation.
That's a good start with MOT since there is scavanging components in big scale and buying cheap meters is a good mix for testing it's robustness as almost one time operation.
Well there is always the good old cell phone charger bricks with 6VA transformers 230V / 6V in back to back configuration or a brand new 12VA 230V / 12V for the newer to start on higher voltages
Battery operated? A flyswatter for example