Tach and fuel sensor

[uk_figs]

I am in the test phase of my RV-7 and have a couple of questions:
1. The tach hours are way more than the Hobbs hours (17 versus 5), I am using the standard Van's tach pickoff attached to the EMS RPM left lead, is there a setup problem I have missed?
2. The Van's fuel senders max out at 12 left and 14 gals right respectively on the calibration exercise, in flight the fuel computer seems closer to reality but the tanks seem to start reducing from the incorrect full values per tank (I have set the total fuel to be 42 gals and press full when I fill the tanks) so after 30 mins of flight at 12 gals/hour fuel flow the left tank will show only 6 gals remaining versus the correct 15 gals (assuming full tank at start).
The net result is the tanks show much less fuel available than the fuel computer and the fuel computer of course only shows total fuel values not a per tank value. Is there any way to make the tank values more usefull
Thanks

 

[dynonsupport]

1) Tach hours are based on the Cruise RPM you have set in the Tach setup menu. We count tach time like a real mechanical tach, so we need to know what RPM you want to normalize around. I'd guess you have this at a number that is much lower than your real cruise RPM. Most Lycomings use something in the 2400 range.

2) If your tank values are way off, then all you can do is re-calibrate. Make sure the airplane is in a flight attitude and level in roll when you calibrate. Most customers find the fuel levels to be very accurate, and they work well with the standard vans senders, so something is up. Unfortunately, there is no way to adjust the numbers besides a recalibration.

 

[uk_figs]

OK thanks for the input

 

[uk_figs]

Recalibrated the tank senders in flight attitude and they are working much better, also reset the Tach as suggested and this is working now.
Thanks for the support