background image

Vega AHRS-1 / MAG-1 Operating Manual

Page 5 

3.3.2 Using the course steering indicator

To activate the course steering indicator, steer the required heading and then press the F1 key. The compass will display:

The F1 key pressed at a heading of 176 degrees. Currently the heading equals the  
course to steer as shown below the heading tape. No course steering indicators are  
shown.

The current heading is 169 degrees; course steering indicators show the need to steer 
slightly to the right to intercept the course.

The   current   heading   is   218   degrees;   course   steering   indicators   show   that   a   large  
correction to the right is required to intercept the course.

Each “>” or “<” equals 2 degrees of heading error. To cancel the course steering function, simply press the F1 key again.

3.3.3 The reverse course (from heading) display

Press the F2 key to activate the reverse course display. This display remains active for 
about 5 seconds before reverting back to the normal heading display.

3.3.4 Heading stability issues

You may find short term fluctuations of the heading occurring. These tend to be very small and are typically less than one
degree. This could still cause the heading to fluctuate occasionally by a single degree. These fluctuations occur naturally
in the earth’s magnetic field and can also be caused by nearby electrical equipment such as radios, lamps, electronic
instrumentation or computers, even the ignition systems of engines. The AHRS-1 / MAG-1 has a compass filter setting
which can be set to filter out some of these small fluctuations.

Summary of Contents for AHRS-1

Page 1: ...rce indication Advanced magnetic compass with a course steering feature and slip indication Can be setup as an individual compass display artificial horizon or both The AHRS 1 MAG 1 is connected to the AHRS Compass sensor packages by a simple CAN bus interface This allows for the optimum placement of the sensor packages in the aircraft More then one AHRS 1 MAG 1 unit can be connected onto the CAN ...

Page 2: ...l anti clockwise will scroll through the main displays Artificial horizon compass and turn and bank indicator F1 Up Button Menu System Softkey button Pitch level function 2 1 4 enclosure Can be front or rear mounted Rotary Control Up Down Enter Button Press the rotary control during the normal display screens to access the menu system Rotate anti clockwise for up down menu scrolling F1 Up Button M...

Page 3: ...pass 3 1 Artificial Horizon with Compass Pitch level function Should your aircraft fly nose up or nose down due to trim then you can press the F1 key to level the pitch as displayed on the horizon 3 2 Turn and Bank Indicator Slip indicator A step on the ball slip indicator can be enabled to appear below the horizon and compass displays The source of information for this indicator is derived from t...

Page 4: ...based on mechanical gyros Simply correct the horizon when you are finished or let the horizon right itself which will happen during straight and level flight Message displayed when the maximum bank pitch or yaw rates have been exceeded 3 3 Digital Compass 3 3 1 Compass Tape The digital compass tape can be displayed in 3 different ways The way the compass is displayed can be setup in the menu syste...

Page 5: ...degrees of heading error To cancel the course steering function simply press the F1 key again 3 3 3 The reverse course from heading display Press the F2 key to activate the reverse course display This display remains active for about 5 seconds before reverting back to the normal heading display 3 3 4 Heading stability issues You may find short term fluctuations of the heading occurring These tend ...

Page 6: ... 4 1 Exiting the menu system Press the F1 Up button to exit the menu system when the EXIT soft key is shown All changes made during navigation of the menu system will be saved in non volatile memory upon exiting The instrument will not save any changes if you remove power before exiting the menu system 4 2 Horizon Setup Compass Select ON if you would like to see the compass box on the horizon disp...

Page 7: ...nabled in the turn and bank indicator mode Slip Sense Select if you want the slip to have a high sensitivity or a low sensitivity setting Slip Zero This function allows you to set your slip indicator to exactly zero even if your aircraft tends to fly slightly wing down The procedure is to place the aircraft in a stable straight and level attitude during calm flight conditions and then select this ...

Page 8: ...ve to update the variation setting This setting may be ignored if you only use the magnetic heading display option Filter Select the filter factor for the compass heading A selection of NONE LOW MED or HIGH can be made This can improve the stability of the compass Slip Select if you would like to enable the slip indicator to be shown underneath the horizon display The slip indicator operates in th...

Page 9: ...ind heading errors that are within 1 to 2 degrees about the limit one can reasonably expect When satisfied end the calibration by selecting DONE in the compass calibration menu This will save the calibration to permanent memory in the SP 6 Should you not be able to achieve a good heading readout please locate the compass to a better location in the aircraft The AHRS 1 MAG 1 displays the calibratio...

Page 10: ...ISC Setup Miscellaneous Setup Backlight Select this menu option to adjust the backlight brightness Security Setup Select this menu option if you want to password protect the menu system Information This menu option displays information about the unit ...

Page 11: ...ading turn and bank or horizon is illegal 6 RS232 NMEA enabled GPS receiver message The AHRS 1 has the ability to be connected to a NMEA enabled RS232 GPS receiver to allow the AHRS 1 to use the actual ground speed in the attitude aiding algorithms The NMEA enabled RS232 GPS receiver must be able to output a GPRMC message The Recommended Minimum sentence defined by NMEA for GPS Transit system data...

Page 12: ...sensors themselves are functional 9 AHRS 1 MAG 1 Specifications Operating Temperature Range 10ºC to 60ºC 14ºF to 140ºF Storage Temperature Range 20ºC to 80ºC 4ºF to 176ºF Humidity 85 non condensing Power Supply 8 to 30Vdc SMPS switch mode power supply with built in 33V over voltage and reverse voltage protection Current Consumption Approx 73mA 13 8V backlight highest setting 33mA 13 8V backlight l...

Page 13: ... field by connecting the RS232 port to a PC and running the firmware update program Note that only the RS232 port can be used to upgrade the firmware Please see the Vega firmware upgrading document for more information 12 Installation 12 1 AHRS 1 MAG 1 Cable connections Main connector D15 connector Unit Female Cable Male D15 Pin Color Function 1 Red 8 30Vdc power via power switch circuit breaker a...

Page 14: ...rnal 1A fuse is recommended Connect the supply terminals to your aircrafts power supply The AHRS 1 MAG 1 can be used on both 12V and 24V without the use of any pre regulators Ensure that the supply voltage will not drop below 8V during operation as this may result in incorrect readings ...

Page 15: ... and relevant pilot s license This person has to make themselves familiar with the operation of this instrument and the effect of any possible failure or malfunction Under no circumstances does the manufacturer condone usage of this instrument for IFR flights IMPORTANT NOTICE You must make your own determination if the products sold by MGL Avionics are safe and effective for your intended applicat...

Page 16: ...SI ASV 1 Altimeter Airspeed ASI and Vertical Speed Indicator VSI EMS 1 Engine Monitoring System FF 4 Fuel Computer INFO 1 Information Display G force meter RTC Outside Air Temperature OAT Volts and Current display MAG 1 Magnetic Compass Indicator MAP 3 Manifold Pressure and RPM Indicator RPM 1 Universal Engine Rotor RPM Indicator TC 4 4 Channel Thermocouple EGT CHT Indicator TP 3 Universal Tempera...

Reviews:

Related manuals for AHRS-1