Trio Avionics EZ Altitude Control - Manual (Page 4)

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SYSTEM
TEST
EZ Altitude Control System
1.0 Introduction
Congratulations on choosing the EZ Altitude Control System. The EZ-1 System is designed to
hold a precise altitude of the aircraft. The EZ-2 system has all the features of the EZ-1 system
and adds additional safety features, vertical rate selection and vertical speed or airspeed capture
capabilities. The EZ-3 system builds on the capabilities of the EZ-1 and EZ-2 systems adding
airspeed management modes and altitude preselect and capture features. The following
paragraphs describe the EZ altitude control systems in detail. The EZ-2 system description
begins in paragraph 8 of this manual. The EZ-3 system is described in section 9.
The EZ-1 will precisely maintain a desired pressure altitude for your experimental aircraft up to an
altitude of 20,000 feet. In smooth air it will hold the aircraft altitude to within +/- 20 feet (generally
less). In turbulent air or turns of 15 to 20 degrees bank angle it will hold to within +/- 50 feet.
While the EZ-1 is simple to use, this manual is a guide to understanding its basic functions and
employing its many features. Operation is as simple as pressing the “ALT HOLD” button.
This causes the aircraft to maintain the current pressure altitude. The following sections illustrate
the built in safety measures, messages and the many features available in your new system.
2.0 General Information
The EZ altitude control system is comprised of 4 major hardware elements:
1 Elevator Servo
2 Electronics Module
3 LCD push button switch
4 Rotary encoder control
In addition, an external Sonalert or other warning device may be connected to provide an audible
warning prior to system disconnect. An audio tone is also available as an input to the aircraft
intercom system. An auxiliary small remote push button (momentary – normally open) switch
mounted to the stick or yoke will allow access to the many additional features of this system
.
3.0 Operation
When power is applied, the amber SYSTEM TEST message will be
displayed for approximately 8 seconds. After this stabilization period
the unit will become fully functional. The LCD switch will display a
green READY message. The altitude hold function is activated by
pressing the LCD switch which will then annunciate the hold condition
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