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Old 07-12-2016, 08:32 PM   #1
Yankandbank
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Default Christen fuel flow gauge

I've a got digital Christen fuel flow and gallons used gauge that no one seems to anything about (locally) other than operating it in a S2B. It has been working great but I think it's starting to go bad. It's about a 1/2 gallon off from the stock fuel flow gauge (it wasn't before or that one is going bad) in cruise. When I power up the Pitts, the gauge would say what I burned, now it shows a random number that starts with a 9. I thought maybe it was a fault code of some sort, but I'm not finding anything anywhere. I've checked all the connectors and everything seems to tight and fine.

Any suggestions or am I just observantly paranoid?

Thanks


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Old 07-12-2016, 08:42 PM   #2
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I am not going to comment on whether you are observantly paranoid or not, but I believe that gauge was made by Davtron.


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Old 07-13-2016, 12:47 AM   #3
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Thanks for the info, but when I called the person I spoke with was clueless about past products.
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Old 07-18-2016, 12:07 PM   #4
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So no one has a manual or knows what the codes mean? There is another guy out there that is having the same issue but his shows 9's.

Maybe the plane is self aware and is grading landings now?
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Old 07-18-2016, 04:14 PM   #5
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Quote:
Originally Posted by Yankandbank View Post
Thanks for the info, but when I called the person I spoke with was clueless about past products.
Not surprising, I am sure these are ancient history to them. I remember years ago talking to someone at Davtron about something and once I got the right person, they were very helpful. I don't believe it is a very big company and it is possible that the people that know about your gauge have moved on, but it might be there is someone there that can help.
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Old 07-19-2016, 12:37 AM   #6
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Yes, the instrument was made by Davtron. It uses a standard transducer that's available from JPI. You will need to compare numbers off your old transducer to get the right one. Davtron made the gauge for the Eagle and when Christen took over Pitts production they put them in the Pitts as an option. The transducer is the only moving part in the system.
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Old 07-19-2016, 02:34 AM   #7
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I found my calibration instructions so you might want to try that first.
1. Measure amount of fuel used. Dip the tank or top off.
2. If quantities disagree remove indicator from panel to gain access to calibration screw. It is above the connector on the back.
3. Press and hold the FUEL METER button after 15 seconds continue to hold the button and adjust calibration screw so that the displayed quantity is the same as measured quantity.
4. Release button. Indicator is now calibrated.
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Old 07-15-2017, 11:07 PM   #8
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ImageUploadedByBiplane Forum1500160012.793900.jpgImageUploadedByBiplane Forum1500160023.801765.jpg

Still having issues and no luck on getting more information. So what did everyone replace theirs with??
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Old 07-17-2017, 06:55 PM   #9
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This is the modern fuel flow gauge I'm familiar with:

https://www.jpinstruments.com/shop/fuel-scan-450/
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Old 07-18-2017, 12:04 AM   #10
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I have had this one in a couple planes. Very easy. This is the one I have along with a JPI 700. I'm still debating on if I should put this in panel or just add to the 700. I'll see I guess when I get panell lay out finished. I'd recommend it.
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Old 07-18-2017, 02:22 AM   #11
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I went with a JPI 740, probably uses the same flowscan transducer as yours. It replaces all of the engine instruments which may be more than you are looking for, but I have been very happy with it. JPI will add wires so that you can put buttons in the back seat.


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