I cant count how many times I have had to reset the power to the EDM
So I'm not the only one!
For the benefit of those who haven't had the pleasure (!) of using an EDM 700, one of the major user interface issues is setting the amount of fuel in the tanks. When in the appropriate mode (which is an issue in itself), pressing and holding the right hand button rapidly increases the value for fuel in the tanks. If you overshoot the correct amount (which you will), you have to repeatedly press the same button, to decrement the value, IN TENTHS OF US GALS!!!
If the fuel amount has been set to full tanks (74 Gals), which is easily done and I want to set it to half-tanks, I have to press the bl**dy button 370 times!
I've given up. I just write down the amount of fuel in the tanks and then compare it with the fuel used display, which can be easily reset to zero.
On the plus side, the fuel consumption calculation is very accurate. I carefully dipped the tanks at the beginning and end of a day's towing and added in the fuel that I added. The amount of fuel used, according to my calculation, matched the EDM 700 fuel used value to within half a gallon.
I monitor CHTs during the climb, enrichening the mixture and/or increasing speed as required to keep the CHT below 400° F and then during descent, I switch to the CLD display, which shows the highest rate of cooling of any of the cylinders in degrees per minute. With care in how I throttle back and manage the descent IAS, I can keep the initial rate of cooling below 20° per minute and reduce the rate to close to zero by the time I'm in the circuit. The CHT usually never drops below 350° F.