[Diy_efi] wide band O2's

[WopOnTour]

MessageThanks gary
I think I understand your concern (and don't disagree)
But as the controller is maintaining pumping cell and heater current in a closed loop fashion, wouldn't this allow for drift or skew that occurs over time? I'm curious what the source/root cause of any significant drift might be - normal chemical breakdown? contamination?
Thanks for sharing your thoughts
Regards
WOT

  ----- Original Message ----- 
  From: gary 
  To: diy_efi at diy-efi.org 
  Sent: Tuesday, July 05, 2005 9:38 PM
  Subject: Re: [Diy_efi] wide band O2's


  As I understand it, WB controller (analog) circuitry that relies on 
  a sensor calibration resistor without manual calibration, does not 
  allow for sensor outputs as they drift over time/use.  The sensors 
  drift, but the calibration resistor stays the same.  I question the 
  accuracy over time/use.

  GAS
    ----- Original Message ----- 
    From: WopOnTour 
    To: diy_efi at diy-efi.org 
    Sent: Tuesday, July 05, 2005 10:08 PM
    Subject: Re: [Diy_efi] wide band O2's


    Wouldn't it depend on what ASIC was chosen to provide nurnst and 
    pumping cell current control and AC-DC measurement?...  It's been 
    known that these ASICS do not require routine calibration as they 
    derive a trim solution based on the sensor calibration resistance. 

    ----- Original Message ----- 
      From: gary 
      To: diy_efi at diy-efi.org 
      Sent: Tuesday, July 05, 2005 5:15 PM
      Subject: Re: [Diy_efi] wide band O2's


      I thot digital was 'state of the art'.  Isn't PLX analog?  
      I question the accuracy.

      GAS

        ----- Original Message ----- 
        From: Brian McMahan 
        To: diy_efi at diy-efi.org 
        Sent: Tuesday, July 05, 2005 10:42 AM
        Subject: RE: [Diy_efi] wide band O2's


        If you want state of the art you should try the PLX R-500. It's the 

        best I've ever used.

        www.plxdevices.com 



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