Applying 2kVDC to various revisions of the DT830 DMM
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- Опубликовано: 5 окт 2024
- Original conversation may be found here:
www.eevblog.co...
An old video explaining the transients I apply:
• Programmable Transient...
The data for the meters I have tested may be found here: docs.google.co...
Answers to Frequently Asked Questions may be found here: docs.google.co...
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It seems that the version DT-830 with the separate on/off switch is different then the version without this switch.
i have here a unbranded version for doing low voltage measurings etc, bought e few years ago in a sort of dollarstore, and this week one part of the LCD screen didn't work properly, so i took it apart and cleaned the zebra rubber strip and it was back up and running. To my surprise had this meter 2 fuses and a PTC. One 500mA fuse for the mA range, and a 5A fuse for the 5A range. I have also some older versions of this meter from back in the 90's, and if i remember correctly, they didn't had any fuse back then, and one of these models has even a flashlight build in on top of the meter, with a on/off switch on the side of the meter. Grtz
Great to see you back! Interesting how the sparks traveled inside and outside the meter case!
Thanks for your "research and testing" of all of those meters and prior ones too. Great resource.
Great experiment, Joe! I have been following the discussion at EEV and I was going to reply to that thread - unfortunately my time has been quite scant to participate on the forum lately.
Another M830B- type meter worth testing is the Hypertough (sold at Walmart), which has third party certification. In the tests I did on my channel (280Vac) it performed quite well and was undamaged in all ranges (except battery testing, but that was expected due to the load resistor). Sure, it wasn't 2kV but it was within its own spec (300V CAT I).
I want the Walmart hypertough tested too.
Your 2 supplies one high, one low voltage. Just like the way an arc is established by a TIG welder
True.
Nice Video Joe. ❤
Well, good experiment. Thank you!
This is a new level of shoddiness. 250V DC can be easily exceeded by probing around household items, in europe rectified mains is 324V DC, in the US interphase voltage between two lives can be easily 240 or 480VAC. Thats dangerous to give out to untrained people.
I doubt you are suggesting we need to regulate the sale of DMMs. Untrained people should avoid dangerous environments and trained people should use proper tools for the job. Many meters I have looked at do not use safety fuses , or no fuse at all like this one. We could regulate the import of such products but then again, I saw on a popular channel where the person was going on and on about safety and Fluke meters, all the while showing that they had blown the fuse and replaced it with something from the local hardware store.
@@joesmith-je3tq i understand you not wanting to give out a name, but i can't deny that i really want to see that video now
@@ItsBoyRed I don't think that's any big secrete. AGV or something another. They did a review on a Fluke non-contact meter. I was asked to look at it and watched some of his other videos on multimeters. One was on Fluke vs some low end meter. This video provided a clear image of the fuse I mentioned. I've posted about it on EEVBLOG and I may have included a segment in one of my videos. Shouldn't be too difficult to find.
WHY WHY WHY what is the point? . You are putting 2KV into it? Ridiculous. DO NOT EXCEED SPECS... Simple. I have a few of these HF meters. They are handy for basic uses, for nominal measurements most people make, Volts, Amps, Ohms IN THE RANGE most people doing home and car maintenance, wiring, basic electronic troubleshooting. it does PNP NPN transistor gain hFE and diode tests as well, works. I only added high quality test leads to a few meters (only way I'd do AC with it). I have several. l placed in kitchen drawer, car, airplane, tool box. One $400 meter is great but worthless if you don't have it with you when you need it..... A multimeter in hand when you need it, even this lowly HF meter, is priceless. They battery last forever. I have about 6 HF meters and think. They gave them away free for awhile. I killed one, reason unknown. The rest have been going decade or more. I also have lab quality test equipment on my bench from HP, Tektronix..... I am not a fan of exceeding specs to LOOK SEE.... there is no point. Engineers designed it who are smarter than you. Trust them.
(BTW the design does and has changed over time, for the better or worse I don't know. The two I have handy at the moment have 1000V DC switch position.)
ROFLMAO!!!
I wonder how many of these things are given to children as toys?
It's about as good as my first Fluke meter. I would have liked to have had a few of these growing up.
@@joesmith-je3tq oh yes first multi meter I had was 1kohm per volt , my first digital was a broken autoranging HP .it had a burned out analogue switch ic (hp special , they quoted something north of £700 for a replacement, so I made one with half a dozen cmos chips and two boards sandwiched together - it mostly worked) . Yes would have killed for one of those freebies:-)