JohnH
New Member
I have just completed an SV installation in a Kitfox 7 with a Rotax 912ULS and ran the engine today for the 1st time. On startup I had no Tach indication. Firmware version 1.5 with Rev B manuals. I went through the wiring, I checked it against the manual and found everything as it should be. I even went as far as verifying that pin 32 for Standard RPM Input Left was correct. The wire was White and Green, it checked out on pin 32, the EMS setup was correct for pin 32. The 30k Ohm resistor was correctly in place. After much head scratching and fiddling I discovered that when I deleted the setup and enabled another RPM gauge for pin 33, it started working albeit at double the engine speed.
Back to the manuals. page 6-6 states pin 32 is for Standard RPM Input left. Table 28 on page 6-22 states that pin 33 is for Standard RPM Left! Table 30 again states pin 32 is Std RPM Left. In practice the green and White wire on pin 32 is STD RPM right and the EMS setup requires pin 33 configured. In the EMS engine setup the pulses per rev. it takes the required pulse from pin 32. Which pin is it supposed to be. I suspect some programming glitch here.
My real problem comes now when Dynon corrects this, I am going to need to re-program the RPM setup as it is now a mixture of pin 32 and 33.
My second problem with new firmware! I wired the setup using firmware version 1.0 and manuals Rev. A. Now Rev B requires some hardware changes, specifically in my case the need for 1.21 K Ohm resistors for the CHT's and Oil Temp. After the new firmware was installed, I had to open up the wiring loom and rip out the offending suckers! Hopefully this trend will not continue. I did some tests and found at the lower temps, the Rotax sensors were pretty well on the money. Near Boiling point of water though I found them over reading by 5 degrees consistently, through a range of temps and on different sensors of the same type.. This is error on the safe side, but still not accurate.
Back to the manuals. page 6-6 states pin 32 is for Standard RPM Input left. Table 28 on page 6-22 states that pin 33 is for Standard RPM Left! Table 30 again states pin 32 is Std RPM Left. In practice the green and White wire on pin 32 is STD RPM right and the EMS setup requires pin 33 configured. In the EMS engine setup the pulses per rev. it takes the required pulse from pin 32. Which pin is it supposed to be. I suspect some programming glitch here.
My real problem comes now when Dynon corrects this, I am going to need to re-program the RPM setup as it is now a mixture of pin 32 and 33.
My second problem with new firmware! I wired the setup using firmware version 1.0 and manuals Rev. A. Now Rev B requires some hardware changes, specifically in my case the need for 1.21 K Ohm resistors for the CHT's and Oil Temp. After the new firmware was installed, I had to open up the wiring loom and rip out the offending suckers! Hopefully this trend will not continue. I did some tests and found at the lower temps, the Rotax sensors were pretty well on the money. Near Boiling point of water though I found them over reading by 5 degrees consistently, through a range of temps and on different sensors of the same type.. This is error on the safe side, but still not accurate.