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Possible to see O2 raw value?

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  • Possible to see O2 raw value?

    Since it will make it a little easier to get CLC correct, is it possible to see raw value in Volts from O2 input? only thing i can see is in % witch does not help me to much when setting stoic voltage in CLC.

  • #2
    For an SM4 the calculation is (channel %/100) * 5000, so 10.6% would be 530mv, where the channel span is 5000mV, or 5V
    Last edited by Chris; April 28th, 2017, 02:17 PM.
    He gets his lap dogs to do his talking for him. Buzzard is a good example.

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    • #3
      And how does the offset come into play? ( span set to 4000 and offset 1000. )

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      • #4
        Depends on config. For direct connection to O2 sensor, set Linearize = LSM11 O2
        He gets his lap dogs to do his talking for him. Buzzard is a good example.

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        • #5
          Originally posted by Chris View Post
          Depends on config. For direct connection to O2 sensor, set Linearize = LSM11 O2
          This is not what i meant, i have this input wired to a analog output fom a innovate, and have programed it so it`S correct with a span of 4000 and a offset of 1000.
          So what i was wondering is how i find what voltage it is seeing when at lambda 1. ( example: at lambda 1 O2 % is at 40 with a span of 4000 and offset 1000. what would that be in input voltage?

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          • #6
            (40/100)*5000 = 2000mV
            Last edited by Chris; May 2nd, 2017, 05:17 PM.
            He gets his lap dogs to do his talking for him. Buzzard is a good example.

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            • #7
              A span of 4000 means that 10 AFR units = 4000mv , an offset of 1000 mean 10AFR = 0mV. 14.7 AFR = 1880mV with (1880/5000) *100 = a channel percentage of 37.6. If at 14.7 AFR your channel % = 40, then you either have scaling or offset errors.
              He gets his lap dogs to do his talking for him. Buzzard is a good example.

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              • #8
                Hi.

                Could you you please explain how you calculate the 14.7 value? (example: span 4211 and offset 735.)( Aem wideband.)

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                • #9
                  What is the afr span 7.35 to 20 afr ?
                  He gets his lap dogs to do his talking for him. Buzzard is a good example.

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                  • #10
                    Analog op scale is 8.5-18 afr (0.5-4.5v.)
                    Its not so much much the number I need now, but more how it's calculated.

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                    • #11
                      From the information Chris has already provided above -

                      Input Voltage = (AFR - (AFR @ 0 mv)) x (millivolts per 1 AFR)

                      Channel % = (Input Voltage / Analog Input Range) x 100


                      I suggest using the 'Calc offset & Span' option in the Autronic Software to confirm your span & offset values.
                      Last edited by gts_215i; October 5th, 2017, 07:30 AM.

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                      • #12
                        Thats good work GTS. I get 3105.6mV / 3.105 volts. Alternately you could measure it with a multimeter.
                        He gets his lap dogs to do his talking for him. Buzzard is a good example.

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