Has anyone installed UMA 1¼ diameter electronic engine gauges supplied by UMA and if you installed them did you have any problems with the operation of them.?
I have fitted UMA 1¼ oil pressure gauge to my aircraft. I am operating an IO-360-C1A power plant so the gauge range needs to be 0-130 psi which is what I have. UMA recommend a VDO 10bar sender unit, which I have.
On operating initially the gauge worked fine then the oil pressure readings started to read incorrectly. They went from 80 to 100psi but the gauge operated in reverse so when after landing the readings increased to 130psi with idle and decreased to 100psi when power was applied. Finally the oil pressure gauge ceased to read at all although when power was applied to the aircraft system the gauge moved to the zero mark. Investigation found the sender unit had failed. A new unit was fitted gauge powered up in reverse again.
I have removed the gauge and the sender from the aircraft and set it up on the bench.
Powered up the gauge – reads zero - apply pressure to the sender - gauge reads reverse.
Any help would be appreciated
Thanks in advance
I have fitted UMA 1¼ oil pressure gauge to my aircraft. I am operating an IO-360-C1A power plant so the gauge range needs to be 0-130 psi which is what I have. UMA recommend a VDO 10bar sender unit, which I have.
On operating initially the gauge worked fine then the oil pressure readings started to read incorrectly. They went from 80 to 100psi but the gauge operated in reverse so when after landing the readings increased to 130psi with idle and decreased to 100psi when power was applied. Finally the oil pressure gauge ceased to read at all although when power was applied to the aircraft system the gauge moved to the zero mark. Investigation found the sender unit had failed. A new unit was fitted gauge powered up in reverse again.
I have removed the gauge and the sender from the aircraft and set it up on the bench.
Powered up the gauge – reads zero - apply pressure to the sender - gauge reads reverse.
Any help would be appreciated
Thanks in advance
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