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Introduction

The ASV-1 is a 2 1/4” (57mm) sunlight readable encoding altimeter, airspeed and wide range vertical speed indicator.

The altimeter contains an internal high accuracy 24 bit digital altitude sensor which calculates altitude from -1500 ft up to
a maximum of +35000 ft. The ASV-1 outputs various formatted RS232 serial data protocols compatible with serial input
transponders such as that from Garmin, Magellan, Northstar, Trimble, Microair etc. The altimeter can display altitude in
feet or meters and local pressure can be set in millibars or inches of mercury

The VSI indicator can be displayed in either feet/minute (ft/min) or meters/second (m/s). The VSI can be calibrated by the
user once the instrument has been installed in the aircraft.

Airspeed is based on the pressure generated by a pitot tube system and a static port is provided as well for use by high
speed aircraft. The ASV-1 can measure airspeed from 20mph to 250mph (Version 1), 20mph to 350mph (Version 2) and
20mph to 320mph for the ASV-1HS (High Speed version). All are well suited to slower aircraft due to very good sensitivity
and linearity at low air speeds. Airspeed can be indicated in statute miles per hour (mph), kilometers per hour (km/h) or
nautical miles per hour (kts). The ASV-1 also provides a programmable Vs and Vne airspeed alarm output. ASI sensitivity
can be calibrated by the user to cater for errors caused by pitot tube placement.
 
In addition, the ASV-1 provides an encoder test function, flight timer since takeoff and records the maximum airspeed
reached. The ASV-1 provides a parallel Gillham code interface when used in conjunction with the MGL Avionics CNV-ALT.

Please note that the ASV-1 Version 2 replaces both the ASV-1 Version 1 and the ASV-1HS (High speed) unit.

Vega ASV-1

Altimeter, Airspeed (ASI) and Vertical 
Speed Indicator (VSI)

Operating Manual – English 1.13

Summary of Contents for Vega ASV-1

Page 1: ...ic port is provided as well for use by high speed aircraft The ASV 1 can measure airspeed from 20mph to 250mph Version 1 20mph to 350mph Version 2 and 20mph to 320mph for the ASV 1HS High Speed versio...

Page 2: ...an be in feet minute ft min or in meters second m s The ASV 1 measures airspeed from 20mph to 250mph Version 1 The ASV 1 measures airspeed from 20mph to 350mph Version 2 The ASV 1HS High Speed version...

Page 3: ...nter Button Press the rotary control during the normal display screens to access the menu system Rotate anti clockwise for up down menu scrolling Rotate the rotary control during the normal display mo...

Page 4: ...ressure readout Either in mB or in HG Altitude unit Airspeed value Airspeed unit VSI value Airspeed unit Airspeed tape Vs0 Min safe speed landing Vs1 Min safe speed normal Vfe Max flap speed Vno Max m...

Page 5: ...st the altitude bug Press the F2 Down key to change the increment decrement unit to 50 or 500 Press the rotary control to exit and save The bug will be yellow when in the display screen and cyan when...

Page 6: ...y control to navi gate through the menu system 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...

Page 7: ...ored in the ASV 1 Flight Select whether you want the ASV 1 to automatically detect a flight or whether the pilot must press the F1 Up button to start stop a flight We recommend you select automatic fl...

Page 8: ...display only ALT Calibrate This section allows for the calibration and fine tweaking of the altitude value Before you begin ensure that your calibrated and certified reference is set to the local pre...

Page 9: ...be purchased from your MGL Avionics distributor to convert the RS232 output to a parallel Gillham output Prot Select the protocol of the serial RS232 output message The protocol can be selected betwee...

Page 10: ...TX Start of text 0x02 Address unsigned char 8bit 0x01 Message Type unsigned char 8bit 0x06 Length unsigned char 8bit Length of the data payload does not include the STX Address message type checksum o...

Page 11: ...C2 C4 1000ft 0 0 0 0 0 0 0 0 1 0 900ft 0 0 0 0 0 0 0 1 1 0 700ft 0 0 0 0 0 0 1 1 0 0 400ft 0 0 0 0 0 0 1 0 1 1 200ft 0 0 0 0 0 1 1 0 0 1 800ft 0 0 0 0 1 1 0 0 0 1 2800ft 0 0 0 1 1 0 0 0 0 1 6800ft 0...

Page 12: ...ry calm conditions Turbulence and thermal activity will make accurate calibration impossible Many areas have ideal conditions during early mornings or late afternoons Place the instrument in ft min fo...

Page 13: ...is performed make sure that there is no air flow into the pitot tube as this would result in an incorrect internal calibration As with any instrument regular zeroing is suggested to achieve maximum pe...

Page 14: ...Enter your minimum safe speed for landing your aircraft Vs Alarm This enables or disables Vs Alarm Vne Alarm This enables or disables the VNE alarm Cal During the factory calibration a factor has bee...

Page 15: ...etup 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 me...

Page 16: ...This menu displays information about the altitude and airspeed sensors 5 Loading factory default settings Press and hold the F1 Up button and rotary control during power up to load the pre programmed...

Page 17: ...flash CRC error will be displayed Reload the instruments firmware and load default settings If the error message still persists then it could possibly be an internal flash memory failure in which case...

Page 18: ...t min to 10000ft min VSI units ft min or m s Airspeed sensor ADC resolution ASV 1 Version 1 12 bit ASV 1 Version 2 24 bit ASV 1HS 13 5bit Airspeed range ASV 1 Version 1 20mph to 250mph ASV 1 Version 2...

Page 19: ...ld up of a pressure differential due to ram air or suction can lead to large errors of the indicated airspeed and alti tude Static ports are usually mounted at a strategic position on the rear side of...

Page 20: ...on 1 Red 8 30Vdc power via power switch circuit breaker and fuse 2 Black Ground 3 White Blue Stripe RS232 Transmit data Firmware upgrading RS232 Altitude output 4 RS232 Receive data Firmware upgrading...

Page 21: ...itude to parallel Gillham code converter The CNV ALT accepts RS232 serial data from a compatible MGL Avionics instrument and produces parallel Gillham codes in a format compatible with mode C transpon...

Page 22: ...Vega ASV 1 Operating Manual Page 22 11 Dimensions...

Page 23: ...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 manufa...

Page 24: ...tical Speed Indicator VSI EMS 1 Engine Monitoring System FF 4 Fuel Computer INFO 1 Information Display G Force meter UTC and Local Time Slip Indicator Outside Air Temperature OAT Battery Voltage Curre...

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