Products > Test Equipment

Big Clive's "Trashy" meter, unboxed ( Duratool D03047 multimeter )

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floobydust:

--- Quote from: IanB on April 27, 2023, 02:34:25 am ---I have a small question for everyone in this thread: do your lightbulbs have a CAT rating on them? When you twist a bulb into its socket, do you ever worry about it exploding in your hand? Do you wear safety glasses and rubber shoes when you change a lightbulb?

A DMM may be connected to the mains for a few seconds at a time to take a reading, and there is only one of them. All the lamps in your house are connected to the mains 24/7 and switched on for hours at a time. They could explode, cause a fire, or cause human injury. The risk is vastly higher than with using a DMM.

Why are there many threads about meters, and no threads about household appliances and electrical devices? There are millions more of the latter, and a proportionately higher hazard, statistically.

--- End quote ---

Appliances have a legal path to a manufacturer, whereas many chinese multimeters have none. Appliances, "electrical devices", light bulbs have lots of room for HV spacings. Small handheld multimeters have no room for reasonable clearances and sized fuses. They are used generally close to your face and hands with exposed wires.

The issue is cheap chinese multimeters with fake/spoofed safety claims and zero evidence of any testing.
They need to stop this horseshit. It just fuels threads like this spinning around the requirements amidst unknown capabilities of the product. Because they can and do involve measurements needing some trust of the numbers- yet they command zero trust for safety, having no evidence of testing or any formal vouching.
We know SFA about the DT830's abilities or design, and there are dozens of variants.
A simple question about suitability for measuring 240VAC mains is a guessing game. People soon will be using these on electric cars and she'll be right.

Fungus:

--- Quote from: IanB on April 27, 2023, 02:34:25 am ---Why are there many threads about meters, and no threads about household appliances and electrical devices? There are millions more of the latter, and a proportionately higher hazard, statistically.

--- End quote ---

There's also similar lack of discussion about wearing gloves+gumboots and going outside to look at the sky before you use your multimeter on mains.

It just never comes up.  :-//

Fungus:

--- Quote from: joeqsmith on April 27, 2023, 12:39:49 am ---My home has a tiny little service coming into from a small distribution transformer.  Nothing like what feeds for the buildings where I worked.    Outlets at my house are several feet from the main feed and are behind small CBs which are behind another small one.  Worse thing that will happen if I pull an outlet and short the wires, I blow a CB.  Hardly CAT III or risk of an arc flash. 

--- End quote ---

Same here. That's why I wasn't worried about measuring the mains with my Big Clive special.

Knowledge is power.

Fungus:

--- Quote from: Someone on April 26, 2023, 09:40:45 pm ---Well, you were taught incorrectly.

--- End quote ---

Don't be too hard on him. Even Fluke corporation is confused by these 'standards'.

Fungus:

--- Quote from: EEVblog on April 27, 2023, 02:57:47 am ---And if you thought there are a lot of people complaining about blowing up DMM's is pointless, wait until you blow up expensive high end bench meters.

--- End quote ---

I think joe secretly enjoys the complaints.  8)


--- Quote from: joeqsmith on April 26, 2023, 01:07:57 pm ---you can imagine the whining when you start to burn down more than someone makes in a year in one video.   :-DD

--- End quote ---

Maybe you could be the whistlindiesel of the test gear world.

Go big or go home... :popcorn:

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