Your equation is incorrect...
the correct equation (according to the NTK manual) is: AFR = V*2.75+7.625
(plug in 0.5V and 4.5V and you'll see AFR 9 and 20 respectively).
I updated the calc_pids.txt file (see attached)...
if you need a voltage correction offset, then add/subtract it from the {EXT.AD1} and {EXT.AD2} in CLC-00-003 and CLC-00-004, for example (see red ink):
Code:
*CLC-00-003
V 0.0 5.0 .1 "{EXT.AD1}-0.2"
AFR 8.0 18.0 .3 "{CALC.NTK1.V}*2.75+7.625"
LAM .5 1.5 .4 "{CALC.NTK1.AFR}/14.55"
BEN .5 1.5 .4 "{CALC.NTK1.LAM}/{SAE.LAMBDA}"
EDIT: THE NTK USER MANUAL IS WRONG, IT SHOULD USE 14.7 AS STOICH
( THEREFORE USE 14.7 INSTEAD OF 14.55 IN YOUR CALC PIDS )
The calc_pids.txt file should be edited accordingly.