[Gmecm] Heated O2 Current Draw

[Danny Sauer]

Joe wrote regarding 'RE: [Gmecm] Heated O2 Current Draw' on Tue, Mar 07 at 12:53:
> > Unless you hook it up to a power source for a few moments to let it
> > heat up, then measure it. :)
> > 
> > --Danny
> 
> Actually, do just that. Hook it to a power supply at 13.8V and
> measure the current directly. Hooking it to a power source for a few
> minutes and then "quickly-change-over-to-the-ohmeter-trick" will not
> be much more accurate since as soon as you remove power to hook the
> ohmmeter, it will cool pretty fast in ambient air. It would get you
> closer, but not accurate... :)
> 
> I think the power supply and a DMM current measurement would be
> best.

Doing the "quick switch" will get you in the ballpark, though, and let
you know if there will be enough current draw to hurt your ohmmeter.
Several inexpensive meters will go "poof" if you run more than an amp
or so through them, even more when you get up to the 10 amp range.

You're right, though, directly measuring the current would be more
accurate - and involve less division. :)

--Danny