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Eis fuel calibration

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byoungplumbing(at)gmail.c
Guest

Posted: Mon Sep 18, 2017 6:22 am Post subject: Eis fuel calibration

The information is kept in both the sender and the EIS.      The sender has a calibration mode so that it knows what voltage to send depending on the fuel level.  

The EIS has program calibration  settings so it knows what to display depending on the voltage it receives

They both save their information in flash ( non volitol) memory

I have made a large assumption that the fuel sender is a capacitive sender,,,   that assumed, there is one thing that you need to know.   Ethonol free gasoline has a constant capacitive value,,, 10 percent ethonol gasoline has a capacitive value that can be twice as much.    Which may be why a half tank reads full....  If I remember correctly the people who manufactures prinston  fuel senders, have a solution to this issue.    If switching between the two different fuels.   They have a new sender with a button that quickly adjust the scale factor.   When you fill the tank with a different ethonol content, you press the button,  at that point it assumes that whatever it is reading is at the same level that was programed at the initial setup.   If you press it when half full, it assumes that the new fuel has a different capacitive value and it sets that level to read full. if you have done this the eis will show that the level of your fuel is dropping twice as fast as normal.   as you approach empty the fuel level showing and the actual fuel level become much closer to the same.    so if 5 gal reads 10 .... 1 gal will read 2...   .1 gal will read .2and 0 will read 0..

That is what I understood after a phone call to prinston.

Boyd Young

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west1m

Joined: 19 Apr 2014
Posts: 155
Location: Hastings, MN

Posted: Mon Sep 18, 2017 9:59 am Post subject: Re: Eis fuel calibration

I thought you might be on to something with the ethanol gas. I always fill my can at a Kwik Trip with the Ethanol free premium. A new bridge was opened in Stillwater so I went to the airport over the new bridge forcing me to buy fuel at a different station. My plane is an hour away so I could not check the tank but there was about a cup left in the bottom of the can. I checked that fuel with one of the test tube water testers and it shows no water, sooo.. I am back to guessing what changed. I will try to recalibrate when I get a day off work to get out there.

If you loo close you can see Randy and his BeLite down by the bridge.

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West1m
Hastings, MN

ceengland7(at)gmail.com
Guest

Posted: Mon Sep 18, 2017 10:56 am Post subject: Eis fuel calibration

Just a heads-up; same principle applies if you ever fuel with avgas; capacitance changes. (Unfortunately, I've forgotten which direction...)

Charlie



On Mon, Sep 18, 2017 at 12:59 PM, west1m <west1m(at)hotmail.com (west1m(at)hotmail.com)> wrote:

 	  Quote: 	
		  --> Kolb-List message posted by: "west1m" <west1m(at)hotmail.com (west1m(at)hotmail.com)>

 

 I thought you might be on to something with the ethanol gas. I always fill my can at a Kwik Trip with the Ethanol free premium. A new bridge was opened in Stillwater so I went to the airport over the new bridge forcing me to buy fuel at a different station. My plane is an hour away so I could not check the tank but there was about a cup left in the bottom of the can. I checked that fuel with one of the test tube water testers and it shows no water, sooo.. I am back to guessing what changed. I will try to recalibrate when I get a day off work to get out there.

 If you loo close you can see Randy and his BeLite down by the bridge.

 

 --------

 West1m

 Hastings, MN

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west1m

Joined: 19 Apr 2014
Posts: 155
Location: Hastings, MN

Posted: Sun Oct 01, 2017 12:14 pm Post subject: Re: Eis fuel calibration

I finally got out to the airport to try to calibrate the Westach fuel level probe. Attempting to calibrate while in the tank by filling the tank and draining did not work. I finally took the probe out of the tank and tried to calibrate it by drying off the probe and shaking all the fuel out of the tube. It took two tries but finally worked. Reinstalled and for now all is good again. 

Flew to Red Wing and back refilling with 100LL in Red Wing and all is still good for now. Looks like we went a week or two early for fall colors but a fun trip anyway. 

http://west1m.com/September27/index.html

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_________________
West1m
Hastings, MN

gdhelton(at)gmail.com
Guest

Posted: Sun Oct 01, 2017 12:31 pm Post subject: Eis fuel calibration

Fall colors are still a couple of weeks out here in northern Michigan too. I shot and posted some early fall color video earlier this month and then it warmed up and they stopped changing. My YouTube channel is : curiousgdh 

George H. 

Firestar, FS100

14GDH

Mesick, Michigan 

gdhelton(at)gmail.com (gdhelton(at)gmail.com)



On Sun, Oct 1, 2017 at 4:16 PM west1m <west1m(at)hotmail.com (west1m(at)hotmail.com)> wrote:



 	  Quote: 	
		  --> Kolb-List message posted by: "west1m" <west1m(at)hotmail.com (west1m(at)hotmail.com)>

 

 I finally got out to the airport to try to calibrate the Westach fuel level probe. Attempting to calibrate while in the tank by filling the tank and draining did not work. I finally took the probe out of the tank and tried to calibrate it by drying off the probe and shaking all the fuel out of the tube. It took two tries but finally worked. Reinstalled and for now all is good again.

 Flew to Red Wing and back refilling with 100LL in Red Wing and all is still good for now. Looks like we went a week or two early for fall colors but a fun trip anyway.

 http://west1m.com/September27/index.html

 

 --------

 West1m

 Hastings, MN

 

 

 

 

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