SV-EMS-220/221 Installation and Configuration
SkyView System Installation Guide - Revision AA 7-37
Figure 61 – SV-EMS-221 / Rotax 912 iS Connections
Other connections, including fuel pressure, amps, volts, trim/flaps, and fuel quantity sensors
are made in the usual way between the individual sensors and the SV-EMS-221 directly.
Additional Rotax 912 iS Installation Instructions
When installing the SV-EMS-221 and the Rotax 912 iS and configuring the SkyView EMS system,
please observe the following:
The engine type under SETUP MENU > EMS SETUP > ENGINE INFORMATION > ENGINE
TYPE must be set to ROTAX 912 iS (SV-EMS-221 ONLY) for 912 iS-specific indications to
display properly.
While the 912 iS ECU does report fuel flow information, Rotax makes no claims about its
accuracy. To allow the 912 iS ECU’s fuel flow parameter to be used by SkyView for both
fuel flow indications and fuel computer computations, simply make sure that pins
C37P14 and C37P19 under SETUP MENU > EMS SETUP > SENSOR INPUT MAPPING are
set to UNUSED. If, instead, you opt to use physical fuel flow sensors, set these pins to
fuel flow sensors in the usual way and the physical sensor will automatically override
the Rotax 912 iS ECU’s fuel flow reports.
If you have not installed physical fuel flow sensors (Dynon Avionics P/N 100403-003;
Electronics International FT-60 “Red Cube”), the fuel flow information from 912 iS ECU
used by the SkyView Fuel Computer can be adjusted if necessary: SETUP MENU >
HARDWARE CALIBRATION > EMS CALIBRATION > FUEL FLOW CALIBRATION > PUL/GAL
(C37 P14) > (value). The default value is 68000. Higher numbers will reduce reported
fuel flow; lower numbers will increase reported fuel flow. For example, if the reported
fuel flow is 10% low (determined by careful records of fuel fills and fuel used), set the
value of C37 P14 to 61818 (68000 – 10%). Changing this value will not alter the
displayed fuel flow; it will only alter the fuel used calculated by the SkyView Fuel
Computer.
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