16 Jun
2006
16 Jun
'06
5:23 a.m.
For many years I used an analogue VOM only. To be
honest, it's rare that
you need to make an accurate meashuremnt when repairing a classic
computer (you want to know if the 5V line is pressent and correct, but if
it's acutally 4.95V, things will still worl fine). Then I picked up a
cheap Fluke 85. I use that almost exclusively now, but the analogue meter
stays on my bench, it's better for osme things.
On this (semi) subject, I vividly remember for a while seeing a "solid state
VTVM"
that had the extremely high input impedance of a VTVM/DMM + the good low-range
response with an analog output. Now, all I see are the "classic" passive VOMs.
What happened to the VTVMS? were they "not necessary"? I'd possibly be
worried about
meter loading messing up some computer circuits with a passive VOM (10-20k vs 10M
meter resistance).
Scott