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Friend of mine just a week ago ordered and received two new Princeton units for his Legacy. The new units are a much better constructed version of the older units which did require some electrical work. Had to pull the wing to access the connector between the Princeton unit and the fuel probe. The fuel calibration instructions also leave something to be desired. We were not able to calibrate the Left tank with the old unit installed, only one light was working which did not indicate any error found in the instructions. With an oscilloscope to verify we were receiving a frequency from the probe we came to the conclusion that the Princeton unit was bad. After removal of the unit, we pulled the board and found a disconnected wire. After soldering the wire back to the board, still could not get the unit to work. With the new unit installed calibration was completed. Like you he also
has the VMS Probe with the MVP-50 engine monitor.
Hope this helps.
Art Jensen
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From:
Colyn Case <colyncase@earthlink.net>;
To:
Lancair Mailing List <lml@lancaironline.net>;
Subject:
[LML] Re: Capacitance Fuel Probe Modules
Sent:
Thu, Nov 28, 2013 6:50:39 PM
| I believe Princeton was founded by Todd at GRT. You might try calling GRT to see if that leads anywhere.
What are the frequency specs on the EI unit vs. the VMS unit? On Nov 28, 2013, at 1:28 PM, Mark Quinn wrote:
Recently had to replace a VMS fuel probe (4-foot) with a EI unit. There is a Princeton Electronics Interface Module to convert down to 1-5 volt range needed for the guage but it appears to be dead. The lights will not come on to do the calibration. In checking the identical unit on the other wing which works fine, it's lights do not come on either. Power was checked to both units and was OK. Without the lights, following the standard calibration instructions are impossible. Has anybody had a similar experience? Tried to contact Princeton Electronics but it is now own by the ANDREA MANN co in south africa. There website has problem so tech support is not available.
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