O2 voltz

[Shannen Durphey]

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