Installation guide

SV-EMS-220/221 Installation and Configuration
SkyView System Installation Guide - Revision R 7-59
External EMS Warning Light
SV-EMS-220/221 D37 pin 29 can be wired and configured as an External Alarm Light
To wire EMS D37 pin 29 as an External Alarm Light, you may connect any standard LED or
incandescent lamp (1.5 watts maximum), used during EMS-related “red” warning alarm
conditions. Ensure that the LED or lamp is designed for the voltage of your system. Mount it to
your panel according to its recommendations. Connect one of the lamp’s leads to your plane’s
power. Connect the other lead to pin 29 on the SV-EMS-220/221 37-pin wiring harness. During
an alarm condition, this pin is connected to ground, causing current to flow through the lamp.
Aircraft Spruce P/N 17-410 is an example of a light that will work for this application. An LED
and resistor in series will also suffice. If you use an LED as the indicator, you must choose a
resistor that delivers the appropriate current to the LED, and can accommodate the power
required for its current and voltage drop. Also note that the power and ground connections on
LEDs are not reversible.
Engine Information
Use the Engine Information Wizard (SETUP MENU > EMS SETUP > ENGINE INFORMATION) to
specify the engine type, horsepower rating, redline and cruise RPM, the RPM pulse
configuration, and tach and Hobbs time (if installation is in a non-zero time engine).
The Inhibit Engine Alerts at Boot option: When set to YES, all engine alerts, both audio and
visual, will occurs until after the first engine start, or 5 minutes, whichever comes first. This
option can help inhibit nuisance alarms before the engine is started. When set to NO, engine
alerts are always active.
If you have an engine type that is in the list, please choose the appropriate engine. This will
allow the system to perform some calculations that are specific to that engine, such as % power
(Lycoming / Continental only) and special operating limitations (Rotax only). If your engine is
not listed, choose "Other."
Horsepower is used to do some of the % power calculations (Lycoming/Continental engines
only) and the auto Rich-of-Peak and Lean-of-Peak detection. Set it to the engine manufacturer's
rated HP for initial usage. You may need to adjust this number in order to get all calculations
working correctly.
If you are getting an auto Lean-of-Peak indication that is coming on too early, before the engine
actually peaks while leaning, lower this number. It is not meant to be a measure of actual
horsepower produced, as engines that are more efficient will act as if they are lower
horsepower in the calculation. This will be particularly true if you are running a higher
compression ratio than the stock charts are based upon.
Cruise RPM is used when calculating tach time. Tach time is a measure of engine time
normalized to a cruise RPM. If you spend one hour at your cruise RPM, tach time will increment
one hour. If you spend 1 hour at 1/2 your cruise RPM, tach time will only increase by 1/2 hour.
Tach time is defined as TIME x (CURRENT RPM / CRUISE RPM).