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The Radio Shack unit I had (the only meter I ever destroyed - by the output of a 50hp PWM servo drive that had too much of an AC component on a DC voltage) was really rugged (I replaced it with the same model).? When the thing blew, it popped internal fuses and shut down the drive, and the only thing that happened was smoke coming out of the lead holes.? Needless to say, I was one unhappy camper about that.

The better units often come with a plastic (insulative) cover or sleeve which helps to contain things like that - they're always a good idea to have on.? (Flukes are pricey but awesome units, I could never afford the model I liked, which had a computer interface.)? I think that sleeve helped to contain the 'pop' (It was quite... audible).

Talking about having equipment blown up...

I did have a scope blown up one time - working on a CNC machine and was doing some special tests in the control.? Stupid nut of an employee pulled the tag from the breaker and flipped it on - sparks and smoke everywhere (fried what was left of their control too).? The company refused to do anything to the stupid jerk, and refused to replace the (portable) Tek scope he destroyed - he almost fried me too (I did get a small burn on my shirt from a spark).? His argument "I need to punch some holes NOW!!!" - even though the machine was NOP and tagged out.? That was the last time I went in that plant.

(The company said because nobody else saw it, that they wouldn't do anything about it, it was my word against their employee!? They also implied that they were going to charge me for a replacement control - even though the jerk did say out loud in the presence of others "but I had to punch some holes!!!")

On 5/6/19 9:00 AM, Jim wrote:

One thing to keep in mind with a DVM is it’s safety rating. Should a transient voltage hit the meter you want the meter to be able to interrupt the internal fault and protect the user with adequate insulation in the probes, leads, and case. At minimum you should look for a Cat 1 rating. Here is some info from Fluke>>

On May 6, 2019, at 1:22 AM, Wayne Leake <wayneleake@...> wrote:

?I have several low priced DVM's.

?Only damaged one so far, wrong kind of voltage, like the electric fence, Dern.

?I have a slightly better one from Tractor supply, that has a few extras, such as capacitance, and an outboard item for transistors.

?Also has a stand of sorts to prop it up, and came with clips to use on the probes.

?Be great if it could test what is left of my truck.

?Burned up Friday evening, just after I got home.

?needing help to buy another.

?I have bought a lot of things from HF, though now I buy stuff from Tractor supply, as it is more convenient.

?Wayne WA2YNE

?In need of a decent pickup now.