Products > Test Equipment
“Blown” Fuses in Several New Multimeters
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indman:

--- Quote from: Phil1977 on September 05, 2024, 09:08:33 am ---There are two types of DMM users - these who have connected voltage to the current input and those who will.

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I can add one more mandatory step, which is usually done after purchasing a DMM - measure the strength and power of the current in a ~220V/110V outlet! ;D
Fungus:

--- Quote from: Locator on September 05, 2024, 08:30:21 am ---
--- Quote from: Fungus on September 05, 2024, 08:21:19 am ---Meters don't have to be in "amps" setting to blow a fuse.

It's enough just to have the cable in the "A" connector when you try to measure voltage.

You don't need voltage to blow a fuse, just amps. You can blow a fuse with 1V if there's enough amps.

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Yep, this was exactly my mistake. I may have mixed up some of the details in my long OP diatribe, but the dial was on “A” and the red probe was plugged into the 10A current jack and I “tested” voltage on the outlet. (Good grief, every time I think about it, I could kick myself. And on a new meter, too.)

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Yes, we understand this incident. I'm referring to all those other fuses...
Fungus:

--- Quote from: Gyro on September 05, 2024, 09:39:31 am ---Never poke standard DMMs into mains outlets, fuseboards etc. Firstly there's nothing to see there that is interesting enough to justify their resolution

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Agree.


--- Quote from: Gyro on September 05, 2024, 09:39:31 am ---and secondly, they are not intrinsically safe (read idiot proof - we are all idiots waiting to happen). Use Electrician's tools.

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Plug in a lamp, it tells you just as much info.
wraper:

--- Quote from: Gyro on September 05, 2024, 09:39:31 am ---In this case, you want a 2 pole voltage tester (not one of those crappy single pole or non-contact ones). I don't have visibility of what is commonly available in the US, but in the UK you would use something like the Martindale VT25, Kewtech KT1710 (or KT1780 if you must have a digital display). Fluke T5 etc.

They are 'idiot proof' - no switches, no sockets, no fuses, they still give a voltage indication if the battery is flat or missing, and have safe continuity test. Above all, they have high CAT ratings for far less cost than the equivalent DMM.

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I'd never waste money on that overpriced garbage that cannot display the voltage with remotely reasonable accuracy. There is nothing wrong with using multimeter as long as you know what you're doing. IMHO those testers are for people who don't know one's head from a hole in the ground. Not to say for that money you can buy a quite decent multimeter with similar CAT rating. Heck, if you cannot plug the leads into proper terminals to save your life, cover amps sockets by sticky tape.
wraper:

--- Quote from: Gyro on September 05, 2024, 09:39:31 am ---Use Electrician's tools.

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Fluke 117 is literally an "Electricians Multimeter" https://www.fluke.com/en/product/electrical-testing/digital-multimeters/fluke-117
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