Dynon SkyView HDX - Fuel Level Sensor

SV-EMS-220 Engine Monitoring System Installation and Configuration
10-14 SkyView HDX System Installation Manual - Revision E
10.2.14.1 General Placement Recommendations for Fuel Flow Transducer
• Do not install the fuel flow transducer, hoses and fittings near exhaust system
or turbocharger. Excessive heat can damage fuel system components.
• Do not install 90 degree fittings (elbows) on the input or output of the fuel flow
transducer. Doing so will cause turbulence in the fuel flow which causes
inaccurate fuel flow data.
• Install the fuel flow transducer with the three (3) wires pointed UP.
• Install a fuel filter UPSTREAM of the fuel flow transducer to screen out debris.
• For best measuring performance, the fuel should travel uphill by one (1) to two
(2) inches (2.54-5.08 cm) after leaving the fuel flow transducer.
• Placement of the fuel flow transducer relative to other items in the fuel system
like fuel pumps is left to the builder. It is common to place the sensor
downstream of any auxiliary electric boost pumps but upstream of the engine
driven fuel pump.
Due to vibration issues, never connect the fuel flow transducer directly to the
engine.
When sealing the fittings on the fuel flow transducer, do not use Teflon tape!
Instead, use a sealant such as “United EZ-Turn Fuel Resistant Lubricant” or
“Permatex Thread Sealant.”
10.2.14.2 Mechanical Installation
The fuel flow sensor has ¼” (6.35 mm) female NPT ports. Do not exceed a torque of 300
inch-lbs. (.112 Nm) when installing fittings into the transducer. The sensor should NOT
be installed with its wires pointing DOWN (the best situation is with the wires pointing UP).
The fuel line on the outlet port should not drop down after exiting the transducer - this
configuration can trap bubbles in the transducer, causing jumpy readings. The inlet port,
outlet port, and flow direction are marked on the top of the sensor.
10.2.15 Fuel Level Sensor
Dynon Avionics does not sell fuel level sensors.
10.2.15.1 Resistive Fuel Level Sensors
You may connect as many resistive fuel level sensors to the SV-EMS-220 to General
Purpose (GP) input – any of Pins 4, 7, 9, 10, 11, 12, 20, 21 (that are not already in use).
We recommend not using Pins 6, 8, 22, and 23, and 31 for fuel level sensors as these
pins are used for some specialized functions. We recommend that Pins 20 and 21 of the
SV-EMS-220 D37 be used for fuel level sensors before using other general purpose
inputs.
If you use a General Purpose Input other than Pins 20 and 21, you must configure the pin
you use: SETUP MENU > EMS SETUP > SENSOR INPUT MAPPING > C37 Pxx.