Trio Avionics EZ Altitude Control - Manual (Page 27)

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1. From the READY mode, repeatedly pressing the encoder will toggle through the various mode
screens as shown below (solid arrows). These screens will appear as amber (waiting) unless the
LCD switch is pressed when they will change to green (working).
A red screen either disconnects
the EZ-3 or, in the case of max airspeed, indicates that significant safety measures have been
implemented.
In the READY mode, press the LCD switch to engage ALT HOLD. Press ALT HOLD to go back to
READY.
2. In the VS MODE, rotate the encoder to set the climb or descent vertical speed. Pressing the LCD
switch will initiate a climb/descent at that rate. (If the rate is left at “0” when the LCD switch is
pressed, the system will engage and hold the present altitude). At any time during the climb or
descent, pressing the LCD switch will enable ALT HOLD and the aircraft will return to level flight. If
the encoder is used to set the vertical speed but the VS MODE is not engaged (still amber), the
selected rate will be activated when ALT PRSLCT is engaged.
Note: For convenience, the pilot may skip entering a value in the VS mode (leave it at “0”) and go
directly to the ALT PRSLCT menu. When ALT PRSLCT is engaged, the VS will default to a value
previously set in the setup menu. The factory sets this value at 500fpm, but pilots may change this
to suit their preference.
3. When in the ALT PRSLCT mode, the encoder can be rotated to modify the capture altitude.
(Rotate for 100 ft. increments. Press and rotate for 1,000 ft. increments). When the encoder is
rotated the ALT PRSLCT screen will turn amber indicating the new altitude is “waiting”. The pilot
must press the LCD to activate the new capture altitude., otherwise he display will time out and
return to the original altitude pre-select display. When the LCD is pressed, the LCD display will
briefly switch to the ALT SET screen. This screen will remain visible for 5 seconds so the pilot can
check to see if the baro ALT SET altitude agrees with the corrected aircraft altimeter (if not, rotating
the encoder will change it). After the 5 second delay times out (or if the LCD is pressed) the aircraft
will begin the climb/descent at the selected (or default) vertical speed. The “VS” mode screen will
be present and a TARGET ALT screen will flash momentarily to keep the pilot advised of the pre-
selected altitude. Once the aircraft reaches the target altitude the system will go into the ALT
HOLD mode and level the aircraft.
When the aircraft is within about 100 feet of the pre-selected altitude, the vertical rate is
automatically decreased to 200 fpm to minimize any overshoot of the capture altitude. Once the
lower VS rate is invoked, the pilot can adjust that VS rate by rotating the encoder knob.
Note: Any time the system is in the green ALT HOLD mode, pressing the LCD switch will disengage
the altitude control system and return it to the READY mode. This may also be accomplished in any
mode by a single press of the remote disconnect switch on the control stick.
READY
VS
MODE
ALT
PRSLCT
BARO
ALT
SET
ALT
HOLD
Solid arrows = Encoder switch press
Dotted arrows – LCD switch press