Re: Checking O2 sensors

["Gregory S. Youngblood" <greg@domain.elided>]

If all you need is the ability to read voltage and have a history, then
another possibility might be a voltmeter Radio Shack sells. Or at least
they sold. I do not know if they still have it. This voltmeter had a
serial interface that you could plug into either a serial printer or
laptop to capture the output.

When I was still doing field work at cell sites I would use this to graph
my microwave path reliability. Useful, and at about $60 to $80 it was
several thousand dollars cheaper than the common alternatives. Of course
that was 4 years or so ago.

On Sat, 5 Jan 2002 christian147@domain.elided wrote:

> This topic has come up recently and I kept my mouth shut because of the
> cost of the tools involved.  The best way to view the condition of a O2
> sensor is with a graphing volt meter with 15 to 30 sec. of history on the
> screen, the switching from lean to rich is very evident.  Tools aren't
> cheep.  Fluke makes some nice ones that start over $500.  The one I just
> bought for work last week was $3K. Computer based oscilloscopes aren't
> lap top friendly so are hard to get into the shop.   I think I just found
> a cheep solution if you have access to a Windows laptop. $ 12.95 for a 4
> channel ADC and instructions for writhing VB script to display voltage.
> I know this won't be for every one but it may put a very useful tool into
> some hands.  With a second O2 sensor mounted after the catalyst you can
> display both outputs on the screen at the same time and check catalyst
> function.
>
> http://www.dataq.com/cgi-local/SoftCart.exe/ednlit/?E+scstore
>
> Chris Hall
>
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