Difference in wideband and HPtuners...
05-01-2005, 10:31 PM
#5
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You have to specify the LM1 output transfer curve
and the HPTuners input transfer curve. Are they
identical? Do they agree at (say) 15.0:1 any
better, or are they offset by the same amount
across the band (that would indicate a ground
offset)?
To maximize the accuracy you might want to set
the LM1 output / HPTuners input to "throw away"
range you're not using - for example, why make
0-5V represent 10.0-20.0:1 AFR if you are well
enough tuned and don't care about anything
outside 11:1 - 16:1? Then the same voltage
range represents with 2X greater accuracy the
AFR.
But do check the LM1 and HPTuners cal curves,
I know the LM1 likes to round down my endpoint
AFR represented and maybe there's a bit slipped
here & there.
and the HPTuners input transfer curve. Are they
identical? Do they agree at (say) 15.0:1 any
better, or are they offset by the same amount
across the band (that would indicate a ground
offset)?
To maximize the accuracy you might want to set
the LM1 output / HPTuners input to "throw away"
range you're not using - for example, why make
0-5V represent 10.0-20.0:1 AFR if you are well
enough tuned and don't care about anything
outside 11:1 - 16:1? Then the same voltage
range represents with 2X greater accuracy the
AFR.
But do check the LM1 and HPTuners cal curves,
I know the LM1 likes to round down my endpoint
AFR represented and maybe there's a bit slipped
here & there.
05-01-2005, 10:58 PM
#6
Originally Posted by jimmyblue
You have to specify the LM1 output transfer curve
and the HPTuners input transfer curve. Are they
identical? Do they agree at (say) 15.0:1 any
better, or are they offset by the same amount
across the band (that would indicate a ground
offset)?
To maximize the accuracy you might want to set
the LM1 output / HPTuners input to "throw away"
range you're not using - for example, why make
0-5V represent 10.0-20.0:1 AFR if you are well
enough tuned and don't care about anything
outside 11:1 - 16:1? Then the same voltage
range represents with 2X greater accuracy the
AFR.
But do check the LM1 and HPTuners cal curves,
I know the LM1 likes to round down my endpoint
AFR represented and maybe there's a bit slipped
here & there.
and the HPTuners input transfer curve. Are they
identical? Do they agree at (say) 15.0:1 any
better, or are they offset by the same amount
across the band (that would indicate a ground
offset)?
To maximize the accuracy you might want to set
the LM1 output / HPTuners input to "throw away"
range you're not using - for example, why make
0-5V represent 10.0-20.0:1 AFR if you are well
enough tuned and don't care about anything
outside 11:1 - 16:1? Then the same voltage
range represents with 2X greater accuracy the
AFR.
But do check the LM1 and HPTuners cal curves,
I know the LM1 likes to round down my endpoint
AFR represented and maybe there's a bit slipped
here & there.
How fast should the numbers change for the wideband in the HPtuners table display? My numbers cycle soo fast you can't accurately read them.
Phil
