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Garmin GEA24 Sheilded Wire

Weasel

Weasel

Well Known Member
Tried searching for this but did not turn up a defiant answer.

The G3X installation manual shows the wiring to be shielded for the Oil pressure, Oil Temp and Fuel pressure sensors.

The supplied sensors that came with the Lycoming installation kit has plugs with about 12" of leads that are not shielded. Is the shielding required for stable engine monitor readings?

The Dynon Skyview system in our -10 does not have shielded wire on these sensors and reads very stable.

Anyone have experience with Garmin?
 
Yes, the shield is required!! The system is quite sensitive and it will pick up erratic interference if you don't do it.
 
KatieB said:
Yes, the shield is required!! .
Click to expand...

Ok thanks Katie. So.....what about the supplied harness?? Cut it off as close at possible to the sensor and run shield to there? If 12" NON-shielded is already there you would assume it must be ok???
 
Weasel said:
Tried searching for this but did not turn up a defiant answer.

The G3X installation manual shows the wiring to be shielded for the Oil pressure, Oil Temp and Fuel pressure sensors.

The supplied sensors that came with the Lycoming installation kit has plugs with about 12" of leads that are not shielded. Is the shielding required for stable engine monitor readings?

The Dynon Skyview system in our -10 does not have shielded wire on these sensors and reads very stable.

Anyone have experience with Garmin?
Click to expand...

Hello Weasel,

Yes, using shielded multi-conductor wiring from the GEA24 to each sensor is recommended for good noise immunity. Most of your sensor wiring will be done with 2 or 3 conductor 22 AWG shielded cable.

We trim the unshielded wires coming out of the sensors down to what is convenient (a few inches), and then attach the shielded signal wire coming from the GEA24. We don't worry about shielding the remaining few inches of wire and have never seen a problem.

Thanks,
Steve
 
g3xpert said:
Hello Weasel,

Yes, using shielded multi-conductor wiring from the GEA24 to each sensor is recommended for good noise immunity. Most of your sensor wiring will be done with 2 or 3 conductor 22 AWG shielded cable.

We trim the unshielded wires coming out of the sensors down to what is convenient (a few inches), and then attach the shielded signal wire coming from the GEA24. We don't worry about shielding the remaining few inches of wire and have never seen a problem.

Thanks,
Steve
Click to expand...
Thanks Steve
 
Weasel said:
Tried searching for this but did not turn up a defiant answer.

The G3X installation manual shows the wiring to be shielded for the Oil pressure, Oil Temp and Fuel pressure sensors.

The supplied sensors that came with the Lycoming installation kit has plugs with about 12" of leads that are not shielded. Is the shielding required for stable engine monitor readings?

The Dynon Skyview system in our -10 does not have shielded wire on these sensors and reads very stable.

Anyone have experience with Garmin?
Click to expand...

Just piling on here, but I have a few inches of sensor wire running before it transitions to shielded wire. No problems with those circuits at all. I did have a problem with a crimp on the K type thermocouple lead which caused an erratic CHT on #3. But that was more electrical conduction vs. radiated interference.
 
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