[Diy_efi] DIY-WB -- Rcal vs. Ip samples

[William Shurvinton]

I'd just like to point the readers to the archives of March-May 1998 when
Gar was learning about this.

'Calibration <snip> What I think this MUST mean, is that with the CAL
resistor properly used, AND with the instrument operating in ATM 02, you can
expect the measured Ip to be within 1% of the average/nominal spec'd value
(happens to be 7.5ma)'

And a little later he said

'The free-air 02 ion pumping current my circuit settles at is only 5% off
from what Frank gets with his NTK sensor' <SNIP>''I measured 6.3mA@ 0.445V
and he (Frank) gets 6.0mA@ 0.428V'

He mentions a whole load of other stuff too you can look up if you want.
Interestingly at some point he has decided that he has not posted the whole
story but decided that 1000s of words of bluster are far better than 10
lines to explain the exact differences between when this was a DIYeffort and
when he became a 'commercial' outfit.

Bill
----- Original Message -----
From: "Garfield Willis" <garwillis at msn.com>
To: <diy_efi at diy-efi.org>
Sent: Tuesday, October 22, 2002 10:52 PM
Subject: Re: [Diy_efi] DIY-WB -- Rcal vs. Ip samples


On Tue, 22 Oct 2002 07:45:57 +1000, Peter Gargano
<peter at techedge.com.au> wrote:

>As the sensor ages, you can expect some variation from the initial free-air
>Ip, so any kind of serious tuning use should be periodically checking (and
>adjusting) the free-air Vout to be 1.50 Volts above the Vstoic value.

This is completely bogus.


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