RDAC X installation manual (800 KBytes) - MGL Avionics

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<strong>RDAC</strong> Fuel injection system monitoring Fuel Injector +12V rail Join here to monitor injector Fuel injection control unit Typical low side fired fuel injection system Should you want to monitor fuel flow directly by means of measuring the fuel injector opening time, the above arrangement can be used. You can use both high or low fired injectors (most systems are low side fired as shown above). After you have connected the system as shown above you can proceed to set up the system. (don’t forget that you need a connection from the <strong>RDAC</strong> ground terminal to the engine block (at the same potential as the battery negative). a) Select high or low side fired injector in the Mode Menu (InjectorH and InjectorL). b) Enable the flow sender in the Mode Menu. c) Select a suitable K-factor in the calibration menu to give you correct rate of flow. A good starting value may be in the 1500-2000 range. Increase to lower indicated flow and decrease to have a larger indicated flow.
Flow through the injectors may not be 100% linear with switching times due to various effects. However, it is possible to obtain very good performance from this flow monitoring system if you keep the following in mind: Calibrate the K-factor so flow indication is accurate during cruise, the period your engine spends most of its active time at. Ensure that you have a correctly working fuel pressure regulator. The more constant your fuel pressure, the more accurate the flow indication. Never use this or any other flow system as your only fuel level indication. This is not the intended purpose of a flow measuring system and this can be dangerous if for whatever reason incorrect flow is indicated.
Page 1 and 2: RDAC X Technical installation docum
Page 3 and 4: The RDAC X power supply and data ca
Page 5 and 6: Installation of the RDAC X The RDAC
Page 7 and 8: RDAC EMS unit thermocouple inputs T
Page 9 and 10: four strokes (such as the Rotax 912
Page 11 and 12: RDAC Fuel flow sender installation
Page 13 and 14: Example: Actual fuel used: 21.5 lit
Page 15: mechanical problems causing the flo
Page 19 and 20: You can connect capacitive senders
Page 21 and 22: The rev counter input on the RDAC c
Page 23 and 24: Connecting the rev counter on a two
Page 25 and 26: The Rotax 912/914 contains two buil
Page 27: Connecting a Bendix magneto as RPM

RDAC X installation manual (800 KBytes) - MGL Avionics

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