Re: AVOmeter compared to cheap modern digital meter
- From: Peter Duck <pduck@xxxxxxxxxxxx>
- Date: Tue, 28 Jun 2005 00:23:26 +0100
In message <9681A7E72BF5264A18E@xxxxxxxxxxxxxxx>
Zak <zak@xxxxxxxxxxxxxx> wrote:
> ... Today I can buy a regularly stocked item like the super-cheapo
> single-chip digital multimeter from a UK shop like Maplins for £8
> ($8) and that includes the battery. Although Maplins call it a
> "domestic tester" it is more than just that:
> 600V-200V-20V-2000mV-200mV plus 600VAC-200VAC
> 10A-200mA-20mA-2000uA-200uA
> 2000kO-200kO-20kO-2000O-200O
> transistor and functions
> overall accuracy approx +/-0.5% to +/-1.0%
> <http://www.maplin.co.uk/module.aspx?ModuleNo=37279&doy=26m6>
> How does something as ridiculously cheap as this meter compare, in
> terms of measurement accuracy, to an old stye AVOmeter?
At least as well (within their more limited ranges), plus being
quicker/easier to read, or listen-to for continuity-checks: perfectly
adequate for most purposes.
I've three of these (I couldn't resist the last two - 'buy one, get one
free' for, at the time, £4.99 IIRC), and use them far more than either
my 'upmarket' digital meter or venerable Avo 8, still needed for
measuring DC kilovolts, AC <current or signal-voltages), and the
fluctuating values for which 'analogue' beats 'digital'.
The mechanical construction of the switching-arrangements is the main
weak point, but (as so many products nowadays) they're a constant
reminder of how hard the Chinese have to work to scratch a living, and
how difficult it is for the affluent West to retain/regain our
competitiveness ...
--
Peter Duck <pduck@xxxxxxxxxxxx>
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