Trio Avionics EZ Pilot - v 1.9 - Manual (Page 19)

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CONTRAST ADJUST
L=DECR R=INCR
SERVO POSITION
SERVO=NORM
MAX TURN RATE
XAUTO
4.1 CONTRAST SETTING (LCD model only)
The first screen presented is the CONTRAST
ADJUST screen. To increase the contrast, move
the L–R switch to the RIGHT. To decrease
contrast, move the switch to the left. This is a
slowly varying adjustment so it will require holding the switch in the LEFT or RIGHT position for
several seconds to cause a visible change on the screen.
4.2 INITIAL SERVO POSITION and SERVO direction
Press the MODE button to sequence to this screen. If this is a VFD equipped unit this will be the
first screen presented.
To change the servo position, use the L–R switch
to increase or decrease the displayed value.
Setting of the servo position is covered in Sections
7.6 and 7.7
To sequence to the SERVO: NORM or REV setting, press the MODE button momentarily. The
arrow indicator will now be before the NORM or REV indicator.
NOTE
This setting will only appear if the GPS is not locked. The autopilot locks out this function in flight.
See sections 7.6.2 and 7.6.3 for proper setting of the SERVO direction.
To change the setting, move the L–R switch to either selection. Release the switch when the
desired direction is obtained.
4.3 MAX TURN RATE Selection
A “standard rate turn” of 3 degrees per second may result in a comfortable bank angle at 130
knots, but as speed increases the bank angle must be increased to achieve the standard rate of
turn. In faster aircraft this steeper bank may be uncomfortable to some pilots and, indeed, may
exceed the capability of an altitude hold system to maintain altitude properly in the turn. To
remedy this, the EZ Pilot has a means whereby the users can adjust the maximum rate of turn to
their personal satisfaction.
When shipped, the EZ Pilot is defaulted to an “automatic” mode where the actual turn rate is
automatically adjusted based on groundspeed (as measured by your GPS) to limit the bank angle
to approximately 15 degrees. For aircraft cruising at groundspeeds of 140 knots or greater the
automatic mode will decrease the allowable turn rate to keep the aircraft bank angle at a
comfortable maximum of approximately 15 degrees. Slower speeds will allow a standard rate
turn of 3 degrees per second.
Alternatively, if your cruise groundspeed is typically less than 150 knots, or if you do not mind the
higher bank angles at the higher groundspeeds, you may want to select the MANUAL mode. In
the MANUAL mode you can set the maximum turn rate to a fixed limit. It is adjustable from 1
degree/sec to as high as 3 degree/sec, in increments of 1/10
th degree/sec. When this screen is
displayed the arrow is preset to select the MAN or AUTO field. Use the L–R switch to change
between the MAN and AUTO options.
To adjust the MAN turn rate press the MODE BUTTON one time until the arrow is in front of the
turn rate value. The L–R switch can now be used to