I helped him over the phone tonightOriginally Posted by mgm1979
I had him reset his LM1 to a more reasonable AFR range and Voltage setup
10-18 AFR
0-5 volts
which yields a [volts/0.625 + 10] formula
then I had him set his outputs to both be 2.95 volts
meaning
10AFR=2.95v
18AFR=2.95v
this gives us a flatline output to go by in our scanner so that we can match it to 14.7
In the scanner we use outr formula and push around the AFR portion of it till it matched 14.7
his was off by .17AFR higher so we moved our formula to be [volts/0.625 + 9.83]
double checked it and moved it to be [volts/0.625 + 9.85]
then set back the LC1 to
10=0v
18=5v
and he's set
your offset voltage doesnt change your formula for voltage/range
it changes the AFR minimum value
we told the output what 14.7 was in our 10-18 setup
the scanner is set up so that we can get an average over a few seconds so we can see what our output voltage is showing at the EIO translated in AFR...so that we can set up our offset properly.
located below are the pics of what I had him do
you shouldnt worry about the extreme ends being correct...it doesnt scrunch your volatages...internally it still uses the formula you program..
but when you get to the ends it truncates the voltages to be its physical limits..
they might call it a 0-5 volt device but its usually not truely capable of 0 volts or 5 volts...but the steps in the middle do follow your set voltage formula