duty cycle readings ?

[Ti Kan]

It may be that your DMM is not displaying correctly.  Some DMMs don't
deal with quickly varying DC voltages well. It's actually better to
view the OXS output using an oscilloscope, or a DMM that has such a
function.

A failed OXS usually becomes slow to respond or not change output at all.

-Ti
-- 
    ///  Ti Kan                Vorsprung durch Technik
   ///   AMB Research Laboratories, Sunnyvale, CA. USA
  ///    ti at amb.org
 //////  http://www.ibiblio.org/tkan/
///

Konstatntin Bogach writes:
> Hi all.
> I am posting this question 3rd time. No response yet. Hope never dies.
> 
> According to SJM ECU changes duty cycle in closed loop 1-2 times per
> second.  I see that duty cycle is changed much more frequently (10
> times, maybe more). In DMM screen I see blur. I wonder is my ECU doing
> wrong things? But it sweeps in spec: 45-50%. In several minutes it
> shifted to 40-50% but it is another why?.
> 
> OXS voltage mesured by DMM is between 15mV and 2.2V. Does someone has
> any idea why it can be more than 1V according to spec? (I did not
> disconnect OXS wire while measuring voltage).
> 
> Do I need to plan OXS changing?