Installation Guide Instruction Manual

Transducer Installation
FlightDEK-D180 Installation Guide 3-3
Cylinder Head Temperature (CHT) Probes
Dynon Avionics sells and supports a variety of CHT probes. All thermocouple harnesses
supplied by Dynon have each function (e.g., CHT1, EGT1) labeled on each thermocouple pair.
LYCOMING/CONTINENTAL
Dynon Avionics sells bayonet style CHT probes (used in Lycoming and Continental engines).
With each probe we sell, a bayonet adapter is included. Your specific engine manual should
describe where to mount these bayonet adapters, but normally, there is a threaded hole (CHT
well) near the bottom of the cylinder close to the lower spark plug. Screw the bayonet adapter
into this hole. Screw the locking collar up or down the spring surrounding the probe such that the
tip of the probe is pressed against the bottom of the CHT well when the collar is attached to the
adapter. Insert the CHT probe into the well and lock the collar to the adapter. Now, plug each
thermocouple wire into its corresponding wire on the thermocouple harness. Ensure that you
match the wire color pairs on the harness to those on the thermocouples.
ROTAX
Rotax 912 engines use 2 resistive CHT probes that are included with the engine. These probes
are preinstalled, but you need to route the connections from them to the FlightDEK-D180. See
the CHT General Purpose Installation section on page 3-15 for information on making the
physical connection to the sensor.
JABIRU
Jabiru engines require a 12mm ring-terminal CHT probe for each cylinder. First, slide the
compression washer off the spark plug. Slide the 12mm ring-terminal probe onto the plug. Now,
slide the spark plug compression washer back onto the spark plug. Reinstall the spark plug into
the spark plug hole. Please refer to the documentation that came with your engine for more
information. Now, plug each thermocouple wire into its corresponding wire on the thermocouple
harness. Ensure that you match the wire color pairs on the harness to those on the thermocouples.