lxnav 5772 Airdata Indicator User Manual
- June 6, 2024
- lxnav
Table of Contents
lxnav 5772 Airdata Indicator
Important notices
The Airdata indicator (ADI) is designed for informational use only. All information are presented for reference only. It is ultimately the pilot’s responsibility to ensure that the aircraft is being flown in accordance with the manufacturer’s aircraft flight manual. The indicator must be installed in accordance with applicable airworthiness standards according to the country of registration of the aircraft.
Information in this document is subject to change without notice. LXNAV reserves the right to change or improve their products and to make changes in the content of this material without obligation to notify any person or organization of such changes or improvements.
WARNINGS:
A Yellow triangle is shown for parts of the manual that should be read carefully and are important for operating the Airdata indicator.
Notes with a red triangle describe procedures that are critical and may result in loss of data or any other critical situation.
A bulb icon is shown when a useful hint is provided to the reader.
Limited warranty
This ADI product is warranted to be free from defects in materials or
workmanship for two years from the date of purchase. Within this period, LXNAV
will, at its sole option, repair or replace any components that fail in normal
use. Such repairs or replacements will be made at no charge to the customer
for parts and labor, the customer shall be responsible for any transportation
cost. This warranty does not cover failures due to abuse, misuse, accident, or
unauthorized alterations or repairs.
THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE EXCLUSIVE AND IN LIEU OF ALL
OTHER WARRANTIES EXPRESSED OR IMPLIED OR STATUTORY, INCLUDING ANY LIABILITY
ARISING UNDER ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR
PURPOSE, STATUTORY OR OTHERWISE. THIS WARRANTY GIVES YOU SPECIFIC LEGAL
RIGHTS, WHICH MAY VARY FROM STATE TO STATE.
IN NO EVENT SHALL LXNAV BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT OR
CONSEQUENTIAL DAMAGES, WHETHER RESULTING FROM THE USE, MISUSE, OR INABILITY TO
USE THIS PRODUCT OR FROM DEFECTS IN THE PRODUCT. Some states do not allow the
exclusion of incidental or consequential damages, so the above limitations may
not apply to you. LXNAV retains the exclusive right to repair or replace the
unit or software, or to offer a full refund of the purchase price, at its sole
discretion. SUCH REMEDY SHALL BE YOUR
SOLE AND EXCLUSIVE REMEDY FOR ANY BREACH OF WARRANTY.
To obtain warranty service, contact your local LXNAV dealer or contact LXNAV
directly.
Packing lists
- Airdata indicator (ADI)
- Power supply cable
- OAT probe
ADI basics
The ADI at a glance
The Airdata indicator or ADI is a standalone unit designed to measure and
indicate airspeed, altitude and outside air temperature. The unit has standard
dimensions that will fit into the instrument panel with an opening of 57 mm
diameter.
The unit has integrated high-precision digital pressure sensors. The sensors
are sampled 50 times per second. Real-time data is displayed on a QVGA 320×240
pixel 2.5-inch high brightness color display. Three pushbuttons are used to
adjust values and settings.
ADI features
- An extremely bright 2.5″ QVGA color display is readable in all sunlight conditions with the ability to adjust the backlight
- Three pushbuttons are used for input
- Logbook
- 100 Hz sampling rate for very fast response.
Interfaces:
- Serial RS232 input/output
- Micro SD card
Technical data ADI57:
- Power input 8-32V DC
- Consumption 90-140mA@12V
- Weight 195g
- Dimensions: 57 mm cut-out 62x62x48mm
ADI80:
- Power input 8-32V DC
- Consumption 90-140mA@12V
- Weight 315g
- Dimensions: 80 mm cut-out 80x81x45mm
System description
Push buttons
Airdate indicator has three pushbuttons. It detects short or long presses of
the push button. A short press means just a click; a long press means pushing
the button for more than one second.
The three buttons between have fixed functions. The top button usually
increases a value or move focus up. Middle button is used to confirm or
dismiss selection. The lower button is used to decrease a value or move the
focus down.
SD card
SD card is used for updates. To update the device simply copy the update file
to the SD card and restart the device. You will be prompt for an update. For
normal operation, it is not necessary to have SD card inserted.
Micro SD card is not included with new ADI.
Switching on the unit
There is no special action required to switch on the unit. When power is
applied to the device, it will switch on and will be ready for immediate use.
User input
The user interface consists of dialogues that have various input controls.
They are designed to make the input of names, parameters, etc., as easy as
possible. Input controls can be summarized as:
- Checkbox,
- Selection control,
- Spin control,
- Slider control
Inside the dialog press top button to move the focus to control above currently selected or press the bottom button to move the next control below the currently selected. Press the middle button to change value of focused control.
Navigating menus:
When you press the middle button for a longer time, you will get into the setup menu. Press the upper and lower buttons to move focus. Quickly press the middle button to enter the submenu. Long press the middle button to exit the submenu or select the Exit option in the menu.
Checkbox
A checkbox enables or disables an option. Press the middle button to toggle
the selected option. If an option is enabled a check mark will be displayed,
otherwise an empty rectangle will be drawn.
Selection control
Selection control is used to select a value from a list of predefined values.
Press the middle button to enter edit mode. The currently selected value will
be highlighted in blue. Use upper and lower buttons to select other values.
Confirm selection with a short press on the middle button. Long press the
middle button to cancel selection and exit without changes.
Spin control
Spin control is used to select a numerical value. Press the middle button to
enter edit mode. The currently selected value will be highlighted in blue. Use
the upper and lower buttons to increase or decrease the value. Long press will
make a bigger increase or decrease. Confirm selection with a short press on
the middle button. Long press the middle button to cancel selection and exit
without changes.
Slider control
Some values, such as volume and brightness, are displayed as a slider.
Press the middle button to enter edit mode. The slider background color will change to white. Use the upper and lower buttons to increase or decrease the value. Long press will make a bigger increase or decrease. Confirm selection with a short press on the middle button. Long press the middle button to cancel selection and exit without changes.
Operating modes
The Airdata indicator has only one main screen, the quick menu for QNH, and
the setup mode. When powered on, the main screen will be shown. Short press
any button to access the QNH menu.
Long press middle button to enter setup mode
Main screen
The primary function of ADI is to display indicated airspeed. Indicated
airspeed is displayed with a needle on user-customizable dial. Great care has
been taken when designing a dial, which is nonlinear to have better resolution
in thermal range. See chapter 5.3.2.1 how to customize speeds markings on the
dial.
In the middle of screen, altitude is displayed as rolling counter. On the right side vertical speed is drawn as a magenta bar. Additionally, two numerical values can be shown. See chapter 5.3.1 on how to customize main screen.
QNH mode
QNH mode is used to enter QNH. Press and key to enter this mode. It will
display current QNH and elevation if you are still on the ground. Press the
upper or lower button to change QNH. The ground display will look like one the
picture be
While flying QNH display will look like the next picture.
QNH display will be automatically closed a few seconds after the last button was pressed.
Setup mode
Long press the middle button to enter setup mode. Setup is used to configure
your Airdata indicator.
A setup menu with the following options will be displayed:
- Display – use this menu to set brightness, customize numerical parameters, set theme color and needle size
- Airspeed – Define speed markings, airspeed calibration table, and method for true airspeed calculation.
- Vertical speed – change vertical speed filter and total energy compensation, if needed.
- Temperature – define temperature offset.
- Battery – select chemistry of the battery, which is being used for ADI in order to have proper battery indication
- Warnings – ADI can display user-defined warnings for speed and altitude.
- Units – define a system of measure.
- System time – enter current time and data for recording purposes.
- Password – used to reach system setup and various calibrations.
When SD card is inserted all settings will be copied to it once you exit setup mode. Settings are stored in file named settings.bin. Insert such SD card to other ADI and you will be prompt to copy settings from SD card to device. With this method you can easily duplicate settings.
Display
Use this menu to set brightness, customize numerical parameters, set theme
color and needle size.
Display row 1 and Display row 2 are used to select values that are shown in top row or bottom row. User can select among the following options: QNH, Battery voltage, Outside temperature, Vertical speed, Density altitude, Flight level, Height above take-off elevation, Altitude, True airspeed, Indicated airspeed and none. Color style – Gauge defines the background color of the airspeed dial, which can be black or default white.
- Cursor style, user can choose between three different cursor styles.
- Brightness s ets current screen brightness. If automatic brightness is enabled then this control will show current brightness.
- If the Automatic Brightness box is checked the brightness will be automatically adjusted between the minimum and maximum values.
- Get Brighter In specifies in which time period the brightness can reach the required brightness.
- Get Darker In specifies in which time period the brightness can reach the required lower brightness.
- Night Mode Darkness is used in night mode, which is not implemented yet.
Airspeed
In this menu, user can define speed markings, airspeed calibration table, and
method for true airspeed calculation.
Speeds
ADI allows user to define all the speed markings for the dial. Please refer to
aircraft manual to enter appropriate speeds.
You can also enter Vne at different altitudes. If Vne are entered for different altitude, then speed marking for Vne will change with altitude and gives a pilot proper warning for maximum speed.
Calibration table
Users can make corrections to the indicated airspeed for instrument and
position error. Use this table to enter corrections. By default, two points
are entered, one for Vso and one for One.
To add new point, select Add Point line and enter IAS and CAS. Press Save button to add or exit to cancel. Press delete line to delete a point.
TAS method
You can select three methods for how true airspeed is calculated. Altitude
only method is using a standard temperature profile with altitude and shall be
used only in case the OAT probe is not mounted or not working properly,
Altitude and OAT is a method that takes into account density change due to
altitude change and temperature change. Altitude, OAT and Compressibility is a
method which takes into account also compressibility of the air and shall be
used for faster aircraft.
Vertical speed
Vario bar filter value defines the response of the vertical speed indicator. A
higher value of filter will cause more slow and more filtered response of
vertical speed indication.
TE compensation is used mainly for gliders in order to show total energy change rather than vertical speed. Set to 100%, if you want to have compensated vertical speed indication or leave on 0 to have non-compensated vertical speed.
Temperature
A temperature offset can be defined here. Temperature offset is the same for
the whole temperature range. Temperature offset should be set on the ground.
If the temperature indication is the air is not ok, you should consider
relocating the OAT probe.
Battery
Airdate indicator can also show battery information in case it is running on
batteries. Select battery type from the list or enter values manually.
Warnings
The indicator can display warnings for user-defined altitudes and speeds. A
warning will be displayed in the center of the screen with red blinking
background and a critical parameter written in the middle of the screen.
Altitude warning
Two altitude warnings can be defined. First altitude warning is set for
altitude ceiling and will be triggered “warn me before” seconds you are going
to reach this ceiling. The second warning is defined for altitude floor and
will be triggered when you are about to descend to this altitude.
Speed warning
Users can select an airspeed alarm for stall speed and for maximum speed.
Units
In this menu, you can define a system of measure for all the data. Select from
predefined sets or change each unit separately.
Password
The Password menu is used to access special functions. Mostly calibration
parameters and resetting sensors, etc. Please consult the manufacturer before
using it.
- 01043 – Auto zero of the pressure sensor
- 00666 – Reset all settings to factory default
- 16250 – Show debug info
- 40000 – Set airspeed threshold (this is a threshold, at which ADI switches from ground to airborne mode)
Wiring and static ports
Pinout
The power connector is pin-compatible with S3 power or any other FLARM cable
with RJ12 connector.
Pressure ports connections
Two ports are on the back of Airdate indicator Pstatic static pressure port
and Ptotal pitot or total pressure port.
Installation
The Airdata indicator requires a standard 57mm cut-out. The power supply
scheme is compatible to any FLARM device with RJ12 connector. On the back it
is fitted with two pressure ports for total pressure and static pressure.
OAT (outside air temperature) probe that comes with the device must be
inserted to the OAT port located next to the MAIN POWER port.
More about pinout and pressure ports connections is available in chapter 7:
Wiring and static ports.
Cut-out
The length of the screw is limited to a maximum 4mm!
Test of the prostatic system
- To avoid rupturing the diaphragm of the airspeed indicators and altimeters, apply pressure slowly and do not build up excessive pressure in the line. Release pressure slowly to avoid damaging the airspeed indicators and altimeters.
- Do not apply suction (vacuum) only to Pstatic line. You may damage the airspeed sensor or diaphragm on pneumatic airspeed indicators.
Static system leak test
Connect the static pressure openings (Pstatic port) to a tee to which a source
of pressure and manometer or reliable indicator is connected.
Do not blow air through the line toward the instrument panel. This may
seriously damage the instruments. Be sure to disconnect the instrument lines
so no pressure can reach the instruments. Seal the disconnected lines.
Apply a vacuum equivalent to 1000feet/300m altitude, (differential pressure of
approximately 14.5inches/363mm of water or 35.6hPa) and hold.
After 1 minute, check to see that the leak has not exceeded the equivalent of
100feet/30m of altitude (decrease in differential pressure of approximately
1.43inches/36mm of water or 3.56hPa).
Static system test
Connect suction (vacuum) on both static opening (Pstatic port) and pitot
opening (Ptotal port). This way you will protect the airspeed sensor and also
other pneumatic airspeed indicators to be damaged due to the high differential
pressure.
Max differential pressure range for ADI is +- 50hPa/20inches of water. Maximum proof pressure, that should never exceed is 500hPa or 14.7inch of mercury.
Pitot system leak test
Connect the pitot pressure openings to a tee to which a source of pressure and
manometer or reliable indicator is connected.
Apply pressure to cause the airspeed indicator to indicate 150knots/278km/h
(differential pressure 14.9inches/378mm of water or 37hPa), hold at this
point, and clamp off the source of pressure. After 1 minute, the leakage
should not exceed 10knots/18.5km/h (decrease in differential pressure of
approximately 2.04inches/51.8mm of water or 5.08hPa).
Pitot system test
Connect suction (vacuum) on pitot pressure openings (Ptotal port). Start
decreasing pressure. When stabilized, compared with the reference. The
measurement repeat at different points (airspeeds).
Revision history
Rev | Date | Comments |
---|---|---|
01 | September 2020 | Initial release |
02 | November 2020 | Updated Ch. 4.2 |
03 | November 2020 | Removed chapter (System Time) |
04 | January 2021 | Style update |
05 | January 2021 | Updated Ch. 5.3.8 |
06 | February 2021 | Updated Ch. 3.1.3 |
07 | March 2021 | Updated Ch. 3.1.3 |
08 | July 2021 | Updated Ch. 7 |
09 | August 2021 | Added chapter 8 |
References
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