21 Jul
2006
21 Jul
'06
2:19 p.m.
However, I am
told it needs recalibration (this is why he gave it
away). It is not _grossly_ out of calibration; as a quick test, I
measured +5V and +12V from a handy (running) computer and local
mains voltage; I got 4.99V (DC), 12.17V (DC), and 122.7V (AC) - all
totally plausible.
Biggest problem is finding a source of known accuracy.
Calibrating a
4-1/2 digit meter to a source that's only 0.5% accurate is just a
waste of time Is there any reason why you *need* to have [its] rated
accuracy
(besides "gee, it would be nice...")?
No. But I don't know how its calibration works; if it's possible that,
for example, voltage is fine but resistance is totally wonky, I'd like
to fix the latter. Or, the 1-10V and higher ranges are fine but the
sub-1V ranges are out of whack. These may not be possible - but I
don't know, and until I do, I have to consider it suspect.
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