[T3] Old Type IIIs (Exhaust Tester)

[Phil Hof]

You are right!  I misspoke about the CO content.  Almost all meters have you
calibrate to the 2% reading all right, but this is done while pressing a CAL
button, changing the scale.  Sorry for the (cough cough) confusion!
-Phil
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> Normal atmospheric CO levels would never be that high. That would be 
> lethal. Even CO2 is not usually that high. 
>
> There's a big difference between CO and CO2.    ;-)
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