EFIS-D100 Installation Guide - Dynon Avionics

Appendix
Appendix B: Dynon OAT Probe Installation and Usage
Note that this section only applies to the OAT with 3 wires (colored red, yellow, and blue), for
connection to the EDC-D10A. If you have the 2-wire OAT (with black/white wires), see one of
the EMS-based Installation Guides for more information.
The following instructions provide information on installing and using the EFIS-D100 OAT
probe. Keep in mind that this probe is designed specifically to work with the EFIS-D100. Do not
expect it to work properly with another OAT or TAS/Density Altitude system. If you own an
Dynon EMS product with an OAT installed, your EFIS-D100 can receive its OAT value from
the EMS via the DSAB wires. See the Dynon Smart Avionics Bus (DSAB) Wiring section on
page 3-11 for information on connecting the two instruments.
TOOLS AND MATERIALS REQUIRED
Dynon Avionics OAT probe/cable with nylon nut and washer.
Drill with 3/8” bit
Dynon Avionics EDC-D10A remote compass module.
2 machined D-sub pins
D-sub pin crimp tool
Loctite
INSTALLATION
Mount Location
It is important that the OAT probe be mounted somewhere on the skin of the aircraft where it
will not be affected by heat sources (sun, engine, aircraft interior, etc). The ideal location would
receive no heat from the aircraft engine or any other source in the aircraft body. While this may
be impractical, it is a good idea to mount the probe as far away from heat sources as possible. On
the RV series, common locations include the wingtip and under the horizontal stabilizer. Avoid
these three locations:
Engine exhaust paths
The engine itself
Where the sensor will have direct sunlight
Where the backside is exposed to a heated cabin
Mounting Instructions
After the mounting location has been determined, drill a 3/8” hole in the skin at the desired
location. Uncoil the cable attached to the OAT probe. Remove the nylon nut from the cable.
From outside the skin of the aircraft, insert the cable first and then the threaded end of the OAT
probe. From within the skin of the aircraft, gently pull the cable until the threaded end of the
OAT probe pokes through the hole. Thread the nylon nut down the cable and up to the threaded
end of the OAT probe. Spread some Loctite around the threads of the OAT probe. Twist the nut
onto the threads of the OAT probe and tighten.
EFIS-D100 Installation Guide 7-7