The voltage fluctuates, that's a screen shot from the video I took.
Here is another screen shot at 12.16v. Should the voltage fluctuate like that?

http://forums.pelicanparts.com/uploa...1681402904.jpg

To do any adjustments do you leave the oscilloscope connected and adjust the 3mm Allen screw
in the sensor plate? What range would it need it to be so I am within range or would I need to get a CO2 reader to test what's coming out of the exhaust.
Thanks

For setting CO via duty cycle all has been explained here where you took part :-):
http://forums.pelicanparts.com/porsche-911-technical-forum/1066133-using-oscilliscope-set-duty-cycle-3.html