O2 voltz

[Steve Gorkowski]

Hi Bruce

Are you using the computer scope probe ? With a one wire o2 sensor or Ngk i can
read full one volt with no loading with same probe. How are you heating it.

Steve

Shannen Durphey wrote:

> Bruce Plecan wrote:
> >
> > For the lack of anything else to do, I hooked the heated O2 up, and was
> > looking at the voltage drop across a sensor resistor, I been thinking of
> > using.
> >   As the heater warmed up, the voltage drop across the resistor changed,
> > just meaning the heater was drawing less current.
> >   I had hooked the scope probe across the O2, and cold there was no output,
> > to be expected, but as it warmed up the output swung toward, .2v.  Just in
> > atmospheric conditions.  Ok, so then it should go way high in pure O2 right,
> > nope went a little over .3, and stopped there.
> >   Did I need to load the sensor?.
> >   The heater doesn't go to a high enough temperature for the O2 to fully
> > swing high?.
> >   Does the engine side need to see a slight amount of pressure to reference
> > to?.
> > Grumpy
> I thought sensor voltage increased as O2 content on element side of
> sensor decreased.  I suspect if the O2 concentration on the Ref side
> of the sensor was increased the voltage would rise some.
>
> Not everyone can duplicate the O2 portions of your experiments at
> home. ; )
> Shannen