Here's three VOMs (Volt-Ohm Meters, current too) that I just
saw over at Radio Shack.
Seems like a yet another series of VOMs for them -- seem quite different
in "look" from the other ones RS carries -- and didn't see
them there as recently as a month or two ago.
All three look much the same, almost as if (my WAG) they're
identical inside except for some features being disabled
for the cheaper models.
Here they are:
#22-812: 46 ranges, $59.95 (temp measurements too)
#22-811: 42 ranges, $59.95 ("measures electric fields")
#22-813: Num-ranges??, $29.95 (also does 9v and AAA batteries).
Anyone know anything about them, eg their accuracy, robustness, etc?
And, are they basically identical, except for maybe the temperature-measuring
and "electric-field testing"?
The cheapest one has the two battery tests; I assume that it puts
them under some kind of load before reading the voltage? If so,
sounds useful -- or am I wrong on that.
Also, re electric-field measurement, isn't that easy to do
voltmeter, by attaching one lead to a good
ground, and holding the other between wetened fingers (your body
being the antenna)?
In all, any opinions about this "new" radio-shack line of VOMs?