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Welcome, Guest. Please login or register. Did you miss your activation email? This topic This board Entire forum Google Bing. Print Search. Author Topic: Multimeters that do not appear to meet their safety specs. Quote from: Lightages on October 27, , am. I don't want to be human! I want to see gamma rays, I want to hear X-rays, and I want to smell dark matter I want to reach out with something other than these prehensile paws and feel the solar wind of a supernova flowing over me.
Lightages Supporter Posts: Country: Canadian po. The latest CAT specs require that all input jacks be rated for the same rating. They also specify that any design or part of the meter must meet the maximum rating of the meter. In other words lower value fuses than what the meter is rated at may not be used. Technically it may have passed its rating tests under the older rules but it does not.
It would also be much safer for the user to know that the meter has a lower rating on its current jacks without needing to remember it. It should have been marked on the face so that anyone picking up the meter can see. I am not saying that it is not a good meter, just that it does not meet current day safety requirements under the latest CAT rating rules. Spunky Regular Contributor Posts: 63 Country:. All this fear about multimeters blowing up and I hardly ever hear anyone talk about fused test leads.
Look in any sparkies tool bag and you'll find a bunch of HRC fused leads. Even a cheap meter can be made a lot safer by just changing the leads. Also my main meter is a clamp, so I will never have leads in the wrong jacks because they don't exist. That said I do make a judgement on what meters go in the electrical kit and what stays on the electronics bench based on what I see inside them.
Sigmoid Frequent Contributor Posts: Country:. I just blew a mA fuse on my BK Precision b Thankfully it originally came with a replacement in the package, lol! Anyway, since it's really easy to hamfist these into blowing, I'm out to get a replacement Should I try to get a V one in the same form factor? Any good sources for these? Yes you can use a V fuse. It will be an "upgrade" of sorts but it does not change the rating of the meter.
Sorry, you're right. New York City, US. You can also buy them on ebay. Quote from: Sigmoid on August 03, , pm. I'm sure this isn't surprising, but I bought an Elenco MK multimeter kit that is supposedly rated for 1kV.
Unsurprising, there is no isolation slots on the PCB, and in fact there's about 5mm between the voltage input and the common trace. Same deal with the other Elenco meter mentioned here, there's a standard V glass fuse for the mA range, and the 20A range is unfused, though there's footprints for it on the board, which I populated because I had a holder handy.
I wouldn't trust this thing for mains voltages, but I've got another meter for that, so it's okay. I can upload pics if anyone's interested. We can add the Mastech MS and it's badge-engineered brother the Protek I have not performed a thorough teardown of mine. I'll have to see if I can find it. Quote from: maiakaat on April 29, , pm. Extech EXseries. Quote from: safetyfirst on October 05, , am. WhiteWolf Contributor Posts: Quote from: Neilm on October 28, , pm.
Quote from: Simon on October 28, , am. I have a call into Amprobe about this awaiting a reply. But I am going to swap the fuses in my AM to V versions. Quote from: safetyfirst on October 08, , am. All other Uni-T meters are suspect and are so are their re-brands.
The meter failed the test. The meter manufacturer had marked the meter with a fake VDE certification mark without actually having the model tested by VDE. Yet that didn't prevent somebody else sending the meter to VDE for testing. Thanks for that video link. I would like to know what voltage and current they used in that test.
No idea. There is a silly number of relevant DIN standards, and I don't have access to them. IEC calls for much larger transients. Not sure about the duration or charge. The Brymen series do not appear to meet their rating either. The series is listed in the manual as having VAC fuses, so Brymen is completely honest about this fact. The series do meet the spec according to the manual. Maybe caused by some transistors on the milliamp range overheating. That's why the fuses are not rated V. There was an error while thanking.
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