GMECM Digest V2 #644

[Bruce Plecan]

The application was for just being able to glance at something, ie in the GN
you really don't want to have to focus on reading a guage.   Yes, I can data
log but I don't run that *all* the time, most, but not all.
Bruce
   Well the shoes on the other foot this year,  Martha was upset and felt
left out about not being invited to the CSH, HQ annual Thanksgiving day
meal.   That will teach here to having snubbed us the last 3 years now.
   Doc has the 10 ga. cleaned loaded N ready to go.  the grocery has an
armed guard this year.  The Incidents of the past 2 years has management all
atwitter there.
   The little guys finally have wheels and tires on the boat trailer, and
have been holding secret meetings in the closet am, so something is
afoot............
   CSH,HQ home of what may be the longest sig lines.





> >Is there a way to test to find out if a analogy (needle) type meter has
> >enough impedance to work with say an O2 sensor?.
> >Doeas any one know of a specific model (and cheap) one?
> >TIA
> Bruce,
> "Cheap" is the operative work here. Yes, there are high input impedance
> analog meters on the market today, but they are not cheap. If you don't
> want to build something such as suggested by Bob Hughs, what you should be
> looking for is an old Heathkit or similar VTVM. VTVMs built back in the
> 50s, 60s and 70s are all high input Z and will work fine. There is nothing
> like watching a good olde analog meter. You can see stuff that digital
> meters just can't display. There are a lot of old still working VTVMs
> floating around.
> Another suggestion: Do you have access to a scope with a DC input? This
> could give you a cool analog like display of whats going on at the O2
> sensor and the scope's input will no doubt be high Z.
> Don

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