On 2005-03-01 said:
Newsgroups: alt.home.repair,alt.energy.homepower
wrote:
[snip]
... The really cheap meters will say something like 2 Kohm /
volt or 3 K ohm / volt on the face. A better quality one will say
something like 20K ohm / volt. These ratings are usually based on 1
milliamp giving full scale deflection of the needle.
No, not 1 mA.
2 Kohm/volt = .5 mA
3 Kohm/volt = .33 mA
20 Kohm/volt = 50 microAmps

[snip]
Getting my first Field Effect Transistor powered meter was a reall
blessing. It had something like 2 MEG ohms / volt sensitivity. Most
of the digital stuff now probably has 10 or 20 Meg ohms / volt.
No, not "per volt". That's the input resistance for DC measurements.

My Beckman 3020 DMM is 22 megohms input resistance.

Fluke 27 and 73 read 11 megs on the Beckman
Fluke 36 DMM and clamp-on AC/DC ammeter reads 2 megs.


Tom Willmon
near Mountainair, (mid) New Mexico, USA

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