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sarg314(at)comcast.net
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 Posted: Sat Jun 03, 2006 8:40 am Post subject: princeton capactive fuel probe |
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I'm looking for a capacitive fuel probe/gauge to use in my old (circa
1999) RV-6A kit (tanks already built). The princeton probes look
interesting because they could probably be used in this tank. You can
specify a bendable section which I think would make it useable with the
standard RV-6A tank configuration.
Has any one used these probes successfully?
--
Tom Sargent, RV-6A
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czechsix(at)juno.com
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| Posted: Mon Jun 05, 2006 7:00 pm Post subject: princeton capactive fuel probe |
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Hi Tom,
I bought the capacitive Princeton probes through Grand Rapids to use with
my EIS-4000 and the probes came already bent and ready to install in the
RV
tanks. I have an -8A but as far as I know the same bend profile will
work
in the -6 series too. Might not hurt to double-check before ordering.
As far as using them "successfully" goes, I've had decent results with
mine. You go through a calibration setup procedure where you turn power
on, push a button on the probe with the tank empty for the empty set
point,
then fill the tank and push the button again for the full set point. The
first time I did this it worked fine on one tank but the other tank was
reading 0.0 and the LED on the probe was flashing an error code.
Instructions said to try the calibration procedure again before calling
Princeton. This is a bit of a pain because you have to empty the tank
completely....it worked out ok for me because I was flight testing and
figured what the heck, I should run the tank dry in the air anyway just
to
make sure I can really use all the fuel in flight. After resetting it
the
probe has worked fine.
My only complaint--and it's a minor one--is that with the tanks full, the
reading from the senders varies by about a gallon. You can program the
EIS
to show whatever quantity you want when the sender is at the full
level...I
measured about 11 gals in my tank when the fuel is at the top of the
sender
so that's what I programmed into the EIS. But the actual reading after
refueling is anywhere from 10.0 to 10.9, and it varies from day to day.
I
didn't expect capacitive probes to wander in their readings like this.
Anyway, the important part is that they do seem to read accurately when
near empty. I have an alarm on my EIS set up to warn me when fuel level
is
reading 1.0 gals in either tank. It will start to flash at me a few
minutes before the engine quits. So I'm satisfied with that aspect of
it.
One other note of interest, I originally installed Vans float sensors in
my
tanks but decided to change to capacitive in hopes that I'd never have to
yank them out and change them (time will tell...). I made the swap
before
mounting my wings so it was easy. The curious thing is that in order to
install the Princeton probes, I had to install both the probe and the
tank
access plate at the same time, with a series of twists and turns. If you
install the probe in the access plate first, or install the plate and
then
try to put in the probe, it won't work. I just mention this because it
may
be a lot harder to retrofit a flying airplane than it was with the wings
off....
Hope this helps,
--Mark Navratil
Cedar Rapids, Iowa
RV-8A N2D getting ready for 50 hr oil change..
------------------------------------------------------------
From: sarg314 <sarg314(at)comcast.net>
Subject: princeton capactive fuel probe
I'm looking for a capacitive fuel probe/gauge to use in my old (circa
1999) RV-6A kit (tanks already built). The princeton probes look
interesting because they could probably be used in this tank. You can
specify a bendable section which I think would make it useable with the
standard RV-6A tank configuration.
Has any one used these probes successfully?
--
Tom Sargent, RV-6A
| | - The Matronics RV-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV-List |
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