CharlesElliott Posted April 10, 2018 Share Posted April 10, 2018 Has anyone data logged oil pressure in a Sigma? I'm tapping into the sensor wire but see very strange sinusoidal voltage with a 0.5s period....which I don't think is right. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted April 10, 2018 Member Share Posted April 10, 2018 Is the sensor a Danfoss with internal snubbing?Jonathan Link to comment Share on other sites More sharing options...
CharlesElliott Posted April 10, 2018 Author Share Posted April 10, 2018 I don't know but snubbing or not, this signal is not normal. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted April 10, 2018 Member Share Posted April 10, 2018 What's the amplitude?Anything unusual on eg the battery voltage?Or on that wire if it isn't connected to that sensor? Experts, please... what's the clever way to rig that test? Edited: And how about making up a new circuit with a free standing battery (or other power source) and wiring that isn't connected to the car but only to the sensor and seeing how that behaves?Jonathan Link to comment Share on other sites More sharing options...
CharlesElliott Posted April 10, 2018 Author Share Posted April 10, 2018 Car isn't running.Looks to be about 7v. Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted April 10, 2018 Member Share Posted April 10, 2018 #4 edited with another idea.Jonathan Link to comment Share on other sites More sharing options...
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