Vega ASI-4HS Operating Manual

Introduction
The ASI-4 is a 2 1/4" (57mm) sunlight readable instrument that provides a wide range airspeed indication in both digital
and analog tape formats. 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. In addition, the ASI-4 provides a flight timer since takeoff and records the maximum
airspeed reached.
Airspeed can be indicated in statute miles per hour (mph), kilometers per hour (km/h) or nautical miles per hour (kts). The
analog airspeed tape can be scaled according to the aircraft's flying speed range and ranges for Vs0, Vs1, Vfe, Vno and
Vne can be set. The ASI-4 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.
The ASI-4 can measure airspeed from 20mph to 250mph and the ASI-4HS (High Speed version) can measure airspeed
from 20mph to 320mph. Both are well suited to slower aircraft due to very good sensitivity and linearity at low air speeds.
1 Features
• Large 1.8" high resolution 160x128, wide viewing angle, sunlight readable, 1000 cd/m2 color LCD display
• The ASI-4 measures airspeed from 20mph to 250mph
• The ASI-4HS (High Speed version) measures airspeed from 20mph to 320mph
• Both units are well suited to slow aircraft due to very good sensitivity and linearity at low air speeds
• Includes a flight timer since takeoff
• Provides a 50 entry flight log that stores duration of each of the last 50 flights. The flight timer can either
be started automatically or by using a front push button
• Airspeed units can be set to miles per hour (mph), kilometer per hour (km/h) or nautical miles per hour
(kts)
• Analog tape with programmable ranges for Vs0, Vs1, Vfe, Vno and Vne
• Contains a programmable Vs and Vne airspeed alarm output
• Records maximum airspeed reached in permanent memory
• Includes a RS232 serial output for interfacing to external equipment e.g dataloggers etc.
• Standard 2 1/4" (57mm) aircraft enclosure (can be front or rear mounted)
• Rotary control plus 2 independent buttons for easy menu navigation and user input
• Wide input supply voltage range of 8 to 30V DC with built in voltage reversal and over voltage protection
for harsh electrical environments
• 1 year limited warranty
Vega ASI-4
Vega ASI-4HS
Airspeed Indicator (ASI)
Operating Manual – English 1.05