APU Oil Quantity Simulator

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3 weeks 4 days ago #1559 by Mark
Some..... (I'm not sure all) APU oil quantity transmitters are basically potentiometers. 
We found 4 VDC excitation voltage present on one end. Total resistance across the pot was 260Ω.
It was hard to find any 260Ω potentiometer on the internet. The one I did find was a 100 watt (way overkill) 250Ω unit on Amazon .
  
  
 
  
  
It can be tried right at the transmitter's removed Cannon plug.
  
  
 
  
 
  • The following user(s) said Thank You: jake ounce

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