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Date: Tue, 09 Oct 2007 11:38:06 -0400
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Subject: Re: [LML] Re: flaky fuel indications
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From: "John Schroeder" <jschroeder@perigee.net>
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One other thought -

Water and fuel have different characteristics and if there is water mixed into the fuel at the bottom of the probe, the capacitance that is read for the signal to the panel electronics would be wrong.

John

On Mon, 08 Oct 2007 22:01:37 -0400, Paul Bricker <pbricker@earthlink.net> wrote:

> Gene,
>
>
> These's a drain hole in the probe?
>
>
> Also, it happens on both of my tanks simultaneously. I have trouble
> imagining how that could be a probe problem.
>
>
> Paul Bricker
>
> N63PB
>
>
>   _____
>
> From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of
> eugene long
> Sent: Monday, October 08, 2007 2:18 PM
> To: lml@lancaironline.net
> Subject: [LML] Re: flaky fuel indications
>
>
> Colyn:
>
>
> I had the same indications early in my 40 hours testing in just the right
> tank. I replaced the conversion module - did not help. I talked with the
> people at EI and they suggested maybe water in the capacitive probe.
>
>
> I drained the tank and removed the probe as far as I could. I did not detect
> any water in the probe, but I found the drain hole in the capacitive probe
> was up instead of down. While the probe was out, drain hole up, I added some
> water to the probe and the indications were very similar to what I was
> experiencing with the probe in the tank. I marked the probe and made sure
> the drain hole was down when reinstalled.
>
>
> The probe worked after reinstallation and I have not had a problem since.
>
>
>   _____
>
> From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Colyn
> Case on earthlink
> Sent: Monday, October 08, 2007 7:46 AM
> To: lml@lancaironline.net
> Subject: [LML] flaky fuel indications
>
>
> long as we're talking electrical problems:
>
>
> I have ei capacitive fuel probes with princeton converters and a grt engine
> monitor (like the chelton engine monitor).
>
> My fuel level on both tanks intermittently shows zero when flying but never
> on the ground.
>
>
> Any idea where to look?
>
>
> Colyn
>
>
>