SkyView System Installation Guide - Dynon Avionics

SV-EMS-220/221 Installation and ConfigurationCHT wire may be extended as well, provided that:1) Type J thermocouple is used for the extension wire. (this is different than EGTwire)2) There is no temperature change across the connection between the junctionthat 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 beincorrect.Dynon Avionics sells and supports a variety of CHT probes. All thermocouple harnesses suppliedby Dynon have each function (e.g., CHT1, EGT1) labeled on each thermocouple pair.Lycoming/ContinentalDynon 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 shoulddescribe where to mount these bayonet adapters, but normally, there is a threaded hole (CHTwell) near the bottom of the cylinder close to the lower spark plug. Screw the bayonet adapterinto this hole. Screw the locking collar up or down the spring surrounding the probe such thatthe tip of the probe is pressed against the bottom of the CHT well when the collar is attached tothe adapter. Insert the CHT probe into the well and lock the collar to the adapter. Now, plugeach thermocouple wire into its corresponding wire on the thermocouple harness. Ensure thatyou match the wire color pairs on the harness to those on the thermocouples.Rotax 912 (except 912 iS)Rotax 912 engines use 2 resistive CHT probes that are included with the engine. These probesare preinstalled, but you need to route the connections from them to the SV-EMS-220. See theRotax CHT Sensors Section for information on making the physical connection to the sensor.JabiruJabiru engines require a 12 mm ring-terminal CHT probe for each cylinder. First, slide thecompression washer off the spark plug. Slide the 12 mm ring-terminal probe onto the plug.Now, slide the spark plug compression washer back onto the spark plug. Reinstall the spark pluginto the spark plug hole. Please refer to the documentation that came with your engine formore information. Now, plug each thermocouple wire into its corresponding wire on thethermocouple harness. Ensure that you match the wire color pairs on the harness to those onthe thermocouples.TachometerTachometer pulses/revolution must be set in the Engine Information Wizard(SETUP MENU > EMS SETUP > ENGINE INFORMATION).Dynon Avionics does not sell a tachometer transducer.SkyView System Installation Guide - Revision O 7-31