21 Sep
2010
21 Sep
'10
8 a.m.
Dave McGuire wrote:
Yeah, they're certainly not great - although I've generally had one kicking
around for car-related stuff, where it usually gets pretty dirty and is bumped
around a lot. Good for continuity and "does this thing have power?" type tests.
Must pick another one up - I'm just surviving on my good Amprobe meter right
now, and it's already got oily fingerprints all over it :-)
cheers
Jules
At the very
low end, in the $3 to $5 range there are "disposable"
DMM's available at discount stores here in the US. They are not a joy
to use but they do mostly work.
I've evaluated five or six of these. The accuracy and stability of
these things, especially in the face of temperature variations, is utter
crap. Don't ever adjust a +5V supply in a PDP-11 using one of these. ;)
Some of these were tested as being 15% off, measuring nearly six volts
from a (very tightly calibrated) 5V supply!