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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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Paul & Gene -

We are using the probes that go with the VMS system. EI uses the same probe. The only difference is that EI has theri electronics module on the outside of the probe and VMS has it embedded in the fitting on the end that screws into the tank. If I remember it, the probe has several holes drilled at the base just before it is potted into the fitting. That would allow one hole to be down to let the water drain. It may be that fuel/water may getting into the electronics module and raising cain.

John

We are using the Princeton Electronics interface module to feed the signal into a Blue Mountain EFIS. So far, we have not had any problems. Calibrating the Princeton module and then calibrating the EFIS @ 2 gallons per slug, took a bit of time.


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
>
>
>