SV-EMS-220 Engine Monitoring System Installation and Configuration
SkyView HDX System Installation Manual - Revision E 10-7
• Make sure the hole is placed to ensure that the sensor does not interfere with
the cowl or spark plug. Also, when making holes, keep in mind that the sensor
could inhibit the ability to perform routine maintenance if placed incorrectly.
• Place sensor in exhaust manifold, and secure it by tightening the clamp with a
flathead screwdriver. Make sure the clamp is tight and provides a secure fit, but
do not over-tighten such that visible stress is put on the pipe.
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
thermocouple. All thermocouple harnesses supplied by Dynon Avionics have each
function (e.g., CHT1, EGT1) labeled on each thermocouple pair.
A loose sensor could allow exhaust to leak. This can lead to carbon monoxide
poisoning in the cabin and/or a potential fire. Have a knowledgeable
mechanic inspect the installation.
The sensor can come loose during flight, and could potentially come in
contact with rotating engine parts or the propeller. We suggest a safety wire
to keep the sensor in place.
10.2.8 Cylinder Head Temperature (CHT) Sensors
Wire length of CHT/EGT harnesses supplied by Dynon Avionics is not critical.
It is acceptable to cut the thermocouple (brown) wire of the CHT/EGT harness
to shorten the appropriate length for your installation. It is recommended to
not cut the “armored” portion of the cable near the sensor end of the CHT or
EGT sensors.
1. CHT wire may be extended as well, provided that:
Type J thermocouple is used for the extension wire.
(This is different than EGT wire).
2. There is no temperature change across the connection between the
junction that is created. For example, do not create a junction across the
firewall.
If either of the above guidelines are not followed, your CHT readings will
be incorrect.
Dynon Avionics sells bayonet style CHT sensors used in Lycoming and Continental
engines. With each sensor 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 sensor such that the tip of the sensor is pressed against the bottom of
the CHT well when the collar is attached to the adapter. Insert the CHT sensor 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.
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