WB O2 Success

Kevin _ kiggly at hotmail.com
Tue Dec 11 00:12:18 GMT 2001


I don't know exactly how the DIY-WB board's circuitry is set up to heat the 
sensor, but I do know you should be able to heat it a bunch quicker than 
that.  The production NTK driver box heats the sensor in about 5 seconds and 
the Horriba driver box heats the sensor in less than 10 seconds.  I can't 
confirm that you can just drop down the resistance to accomplish this 
properly and safely though.

Kevin

>There should be some 15 ohm resistors left over from the parts
>kit. Add some of these time across R4 (the big 1 ohm), until the
>sensor warms up between 45 and 60 seconds. (That is in
>parallel with R4).
>
>BobR.
>
>
> >
> > Question:  It takes exactly four minutes for the sensor to heat up and 
>the
> > LED to light.   Is four minutes heating time typical?  This is a bit too
> > long for my liking.  I assume that there is a need to control the rate 
>of
> > heating the sensor or else we wouldn't have the elaborate heater power
> > supply.   I would like to shorten the heating time if possible.  Any
> > comments on what the effect of shortening the heating time would be?
> >
> > Thanks,
> > Neil
> >
> > 
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