Today's Message Index:
----------------------
1. 06:40 AM - Re: videos of my area (weloveflying)
2. 07:09 AM - Re: Fuel level calibration (Larry Cottrell)
3. 07:22 AM - Eis fuel calibration (B Young)
4. 09:56 AM - Re: Twinstar Mk3 Classic MAUW (normros)
5. 10:59 AM - Re: Eis fuel calibration (west1m)
6. 11:56 AM - Re: Re: Eis fuel calibration (Charlie England)
Message 1
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| Subject: | Re: videos of my area |
You sure have a nice view up there. Great share, thanks for this! :D
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=472975#472975
Message 2
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| Subject: | Re: Fuel level calibration |
I believe I have a Princeton sender on mine. I called EIS and Sandy, who
worked there at that time, told me the setting on the eis to use. Mine
registers 5 gallons when full and the alarm is set to go off at 1. Nothing
should change when the power is off. Its been so long ago, that of course I
cannot remember the setting, so you might call them. I will try to see if I
can find the documentation today.
Larry
On Sun, Sep 17, 2017 at 11:11 PM, west1m <west1m@hotmail.com> wrote:
>
> My Firefly has an EIS panel that I added. To that I have added a fuel
> level sender. After initial install (I may have had to cut the probe, can't
> remember) and calibration the EIS Shows full at 200 empty at 0. The 200
> seems odd but quite usable.
> Recently it has lost calibration. I think it shows full at 50% and more.
> I haven't had time to try and recalibrate yet but my question is, with the
> power off etc, how does it maintain calibration? Is the calibration
> maintained in the sender or EIS? anyone else had trouble with this?
>
> --------
> West1m
> Hastings, MN
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=472972#472972
>
>
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Message 3
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| 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
Message 4
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| Subject: | Re: Twinstar Mk3 Classic MAUW |
Thanks John, I'm waiting to hear back from our LAA, but it looks like you guys
can operate at a greater MAUW than we're allowed to.
Ross
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=472989#472989
Message 5
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| 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.
--------
West1m
Hastings, MN
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=472991#472991
Attachments:
http://forums.matronics.com//files/stillwater1_213.jpg
Message 6
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| Subject: | Re: 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@hotmail.com> wrote:
>
> 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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