Freaky Amazing DMM?!

In article ,=20 snipped-for-privacy@gmail.com says...>=20

m...

er*

I-Z"

=20

That is certainly true (though perhaps your heirs are the ones who=20 will find you), but doesn't modify my statement. In this case, the=20 tool *can* be used as long as the one using it knows what he's=20 doing.

krw used his keyboard to write :

Ok....everything seems to pass right over your head.... I pointed out a limitation of a DMM and you seem to be inferring that I am somehow a hack who blames his tools... BTW> I am not a "craftsman" I am an electrcian.. You don't do what I do for as many years as I have without knowing what the f*ck you are doing.

In article ,=20 snipped-for-privacy@gmail.com says...>=20

com...

over*

"HI-Z"

as

ms

l=20

No, your incompetence didn't pass by anyone.

=20

It is not a limitation of the tool, only the user. Lower the=20 impedance if it's too high. =20

I'll take your word that you don't do "craftsman like" work. You=20 clearly don't know how.

=20

Then pick the right voltmeter for the job, duh.

Hope This Helps! Rich

Late at night, by candle light, Arlowe penned this immortal opus:

What's wrong with using a hi Z voltmeter in a live panel? I do it more often than I really care for, and never have a problem.

- YD.

"HI-Z"

It's not the right tool for the job. A meter which gives you a false reading with bad (or no) contact is a BAD idea in dangerous high voltage/high energy circuits. That is why proper meters with low impedance (Kohms) modes exist for the job, e.g. Fluke 113, 110 series, 289 etc.

Oh dear...

Dave.

There isn't anything wrong with it. Analog meters are dead. High impedance digital meters are only a problem if there is a loose nut inside the panel, holding the leads.

"HI-Z"

Then I suppose Fluke and others make all those purpose designed Low-Z electrical meters for loose nuts then?

Dave.

"HI-Z"

...and electricians who know nothing about electricity, perhaps.

"HI-Z"

I noted the lack of distinction between animate and metallic nuts.

"HI-Z"

has

But at least smart enough to chose the right tool for the job.

Dave.

or "HI-Z"

has

bit

will

For an electrician who know nothing about electricity (99.44% of them, apparently), or if that's all one is ever going to do with the meter, perhaps. For anyone who knows anything about electricity or wants a tool that has more than one use, the high impedance meter is a better choice.

Totally useless in areas of high RF.

As the man says, the proper tool for the job

In article , snipped-for-privacy@argonet.co.uk says...>

Wrong.

Know what you're doing is a better solution. Loose nuts are dangerous.

That statement simply exposes another large hole in your knowledge and experience.

I spent 20 years on a high power HF transmitting station - believe me - I

I would agree. Take two meters. One is 1Kohms. The other is 1Gohms. If the load is low impedance, say 100 ohms, then there's an appreciable error with the low impedance meter-- simple ohms law. While the error associate with the high impedance meter is unmeasurable.

People are probably confusing the fact that a high impedance meter while unconnected to anything will pick up signals, for obvious reasons.

Paul

In article , snipped-for-privacy@argonet.co.uk says...>

Wrong again, in so many ways, but you're good at that. If your field strength is enough to saturate the innards there isn't much that can be done. A low impedance meter isn't going to help. OTOH, we weren't talking about probing inside a microwave oven in operation, rather power distribution panel.

Evidently you don't know much.

Or make the one you have work. It does take some knowledge of basic electricity, but evidently that lets a lot out here.

Sorry, I didn't pay much attention who I was replying to. I'm not taking sides, but I am saying that high impedance meters are better.

Paul

- I

Right. It's easy to lower the effective impedance of a high=20 impedance meter. Going the other way is a lot harder.