Electronics > Beginners

fluke dmm, really need help

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Cody Turner OKC:

--- Quote from: Shock on July 13, 2018, 03:43:22 am ---The neighbor actually did you a favor even though it was a bit of labor on your end. You saved the money on buying the meter. So now you have done all the work you can forget about it.

Here is a video on testing the proper Fluke fuses, you should follow my earlier advice though and see if you have other problems first.



--- End quote ---



I put a new battery and cleaned it up as good as i could, I did a bunch of checks on everything, except current without the proper fuses, I will post a picture of the fuses i got at store for a few dollars that i thought was messing up the current readings,

Cody Turner OKC:

--- Quote from: IanB on July 13, 2018, 04:09:16 am ---
--- Quote from: Cody Turner OKC on July 12, 2018, 11:53:29 pm ---both of the fuses were shorted
--- End quote ---

Fuses are supposed to be shorted, that is to say a short circuit, which is to say they should have very little resistance and should beep on a continuity test.

Are your fuses shorted (as they should be), or open circuit (as they should not be)?

--- End quote ---


Yes I made a mistake! I meant that they were both Open not shorted!! Thanks!
 I am trying to figure out how to post a image to show you guys the current cheap fuses I got

Cody Turner OKC:
Got it! Here are the attached images of the cheap fuses I got at the hardware store for a few dollars, unfortunatly there all I am going to have for quite some time, I am not planning to measure any AC current, only small DC currents in my little breaadboard things never over a hundred mA usually like 40mA etc! but I would rather not use them at all if its going to read wrong or be unsafe

ataradov:
200A? You might as well replace them with a nail.

The problem is not your intent. Fuses protect the meter from accidents. Lets say you wanted to measure a battery voltage, but forgot to switch the meter from "mA" range. Fresh battery will easily supply 10 A and more. And you just fried the meter.

Your safety here is not as affected, if you don't do anything really stupid, like measuring mains directly.

Cody Turner OKC:

--- Quote from: ataradov on July 13, 2018, 04:43:52 am ---200A? You might as well replace them with a nail.

The problem is not your intent. Fuses protect the meter from accidents. Lets say you wanted to measure a battery voltage, but forgot to switch the meter from "mA" range. Fresh battery will easily supply 10 A and more. And you just fried the meter.

Your safety here is not as affected, if you don't do anything really stupid, like measuring mains directly.

--- End quote ---


oh wow, I thought it was 5A (the lowest value I could find for the 440mA fuse.. I know still way to high) the side says FNM-5 then written sideways says Amp, now i just saw the other place where it says 200A 250VAC, not sure why? but the package also says 5A time delay slow blow fuse, and yeah I didnt think about that, its probably better to have no fuse in it there then because if a mistake somehow got made it would mess my meter up, I was only thinking in terms of saftey, thank you

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