| Products > Test Equipment |
| Big Clive's "Trashy" meter, unboxed ( Duratool D03047 multimeter ) |
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| joeqsmith:
--- Quote from: Fungus on April 17, 2023, 06:15:29 am ---Regarding safety of "830" meters, I think the most likely effect of a big transient at home is that they'll go "pop" and cease to function. nb I don't have any hard data to back that up* but there's plenty of soft data, eg. Harbor Freight isn't involved in any class-action lawsuits for giving away millions of these "devices-of-death". Me? I'd be much more worried about people putting the leads in the wrong holes and connecting it to mains AC than about transients. The fuses in this meter will make it just as safe as most $20 meters in this situation, if not safer - my Anengs only have 250V fuses in them. ... --- End quote --- I didn't think you wanted to talk about safety. --- Quote ---It was kind of rhetorical just to emphasize that nothing changed on the inside. It's only the label that changed. --- End quote --- Those free meters have gone through several hardware changes over the years to reduce cost. Even if we saw a difference between the two meters I show, I couldn't tell you if it had anything to do with the label or not. |
| Fungus:
--- Quote from: joeqsmith on April 17, 2023, 12:31:55 pm ---Those free meters have gone through several hardware changes over the years to reduce cost. Even if we saw a difference between the two meters I show, I couldn't tell you if it had anything to do with the label or not. --- End quote --- Is 1100V the limit? Seems to me like a 2000 count meter should be able to display 2000V... :popcorn: |
| Fungus:
--- Quote from: joeqsmith on April 16, 2023, 08:23:12 pm ---If you wanted to promote safe practices, mention the one hand rule. --- End quote --- OK. When measuring high voltage it's a good idea to hold both probes in the same hand, like chopsticks. In the event of an arc flash you'll only lose a couple of fingers instead of both arms and part of your upper torso. Also: Sniff the distribution panel before you start. If it smells of ozone then go and get your Fluke. You'll still die but at least people will know that you weren't using a $4 multimeter. |
| joeqsmith:
--- Quote from: Fungus on April 17, 2023, 01:49:54 pm --- --- Quote from: joeqsmith on April 17, 2023, 12:31:55 pm ---Those free meters have gone through several hardware changes over the years to reduce cost. Even if we saw a difference between the two meters I show, I couldn't tell you if it had anything to do with the label or not. --- End quote --- Is 1100V the limit? Seems to me like a 2000 count meter should be able to display 2000V... :popcorn: --- End quote --- Looking at my videos, it looks like I stopped at 1100 DC. I ran that UNI-T UT90A to about 1.9kV when I connected it to an electronic flyswatter. If you like, I can try it with the newest free one, my oldest one and that UT90A and just see where they all stop working at. UT90A has had the ass blown out of it so many times, I doubt we would learn anything from it. More just the fun factor. --- Quote from: Fungus on April 17, 2023, 01:58:49 pm ---... When measuring high voltage it's a good idea to hold both probes in the same hand, like chopsticks. In the event of an arc flash you'll only lose a couple of fingers instead of both arms and part of your upper torso. ... --- End quote --- The friends of mine that who told me about the two arc flash events at work said in the one case, the workers entered the distribution area for maintenance. The area was supposed to have been shut down. Nothing was left of the person nearest the blast. Another worker that was in the area was badly injured but I understand survived. No meters were involved. The one my friend was involved with where they were trying to make a live measurement, he had enough PPE to save him. |
| Caliaxy:
--- Quote from: Fungus on April 17, 2023, 01:58:49 pm --- --- Quote from: joeqsmith on April 16, 2023, 08:23:12 pm ---If you wanted to promote safe practices, mention the one hand rule. --- End quote --- OK. When measuring high voltage it's a good idea to hold both probes in the same hand, like chopsticks. In the event of an arc flash you'll only lose a couple of fingers instead of both arms and part of your upper torso. Also: Sniff the distribution panel before you start. If it smells of ozone then go and get your Fluke. You'll still die but at least people will know that you weren't using a $4 multimeter. --- End quote --- Hmm… isn’t that rule about not closing the circuit through your heart? |
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