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EFIS Erratic Temp Readings

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mikepienaar09(at)gmail.co
Guest

Posted: Sat Mar 06, 2021 7:24 pm Post subject: EFIS Erratic Temp Readings

Hello 

 

Update on my erratic temp readings, I shorted all the temp inputs and connected one shielded  CHT temperature sensor and the problem went away. Have now replaced all CHT sensors with shielded sensors that I made up using K type thermocouple wire from Aircraft Spruce and shielded it with  braid grounded at one end. Everything stable now.

 

I have an MGL EFIS and had erratic EGT and CHT temp readings. EGT sensors seem to be  grounded already and did not cause a problem once I shorted unused inputs.

 

Thanks for all the help

 

Mike

 

From: owner-aeroelectric-list-server(at)matronics.com <owner-aeroelectric-list-server(at)matronics.com> On Behalf Of Charlie England

Sent: February 6, 2021 4:40 PM

To: aeroelectric-list(at)matronics.com

Subject: Re: EFIS Erratic Temp Readings

 

snipped



 	  Quote: 	
		  

  

  Did you put shorts across them or were they

  simply disconnected? 

                No, they were not shorted, simply disconnected. Will try with them shorted next week.

                I would never have thought of shorting them 

                I did remove the alternator and ran the engine with no alternator and that made no difference,

                Readings were still erratic 

Thanks 

Mike

	


Hi Mike, 



Can you remind us whether the engine is 'standard' mags & carb (or Bendix style injection), or if it has some combination of electronic ignition/fuel injection?



Thanks,

Charlie

 



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mikepienaar09(at)gmail.co
Guest

Posted: Sun Apr 11, 2021 6:23 pm Post subject: EFIS Erratic Temp Readings

Thanks 



My readings have now stabilised after I shorted the unused "ports" and put

grounded shields on the leads



Thanks



--

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