I am helping a friend troubleshoot a fuel indication problem. I am not well versed in how this system works and we can't reach the manufacturer.
The system is installed in an RV-6, one probe per tank. The plane was certified in 2005 with the system purchased sometime around 2000. We have read that SkySports changed their system from 24-33 ohms to 0-5v. Not sure which we have. He has a tank selector switch and a single gauge. The left system works fine. When we switch to the right system, the gauge pegs below empty. We checked for power and ground at the switch, and ran a new ground wire from the sender with no success.
Does anyone know what to test for at the sensor? The tank is about half full and we get ~5 volts at the S lead to ground. From the documentation we have, it looks like a short from the outside of the sensor to ground or water in the tank (internal short) will send the gauge to Full.
Any thoughts on how to troubleshoot our problem? I am thinking there is a problem with the probe and it is sending a bad signal to the gauge. Should we be looking at volts or ohms at the S lead?
Thanks for any input.
The system is installed in an RV-6, one probe per tank. The plane was certified in 2005 with the system purchased sometime around 2000. We have read that SkySports changed their system from 24-33 ohms to 0-5v. Not sure which we have. He has a tank selector switch and a single gauge. The left system works fine. When we switch to the right system, the gauge pegs below empty. We checked for power and ground at the switch, and ran a new ground wire from the sender with no success.
Does anyone know what to test for at the sensor? The tank is about half full and we get ~5 volts at the S lead to ground. From the documentation we have, it looks like a short from the outside of the sensor to ground or water in the tank (internal short) will send the gauge to Full.
Any thoughts on how to troubleshoot our problem? I am thinking there is a problem with the probe and it is sending a bad signal to the gauge. Should we be looking at volts or ohms at the S lead?
Thanks for any input.
