Vega SI-4 Operating Manual Page 5
Zero ASI Sensor:
This setup allows your instrument to measure the zero airspeed reading of the airspeed sensor and set a calibration value
internally for this This is equivalent to some mechanical airspeed indicators that have an adjustment to set the needle to
zero when the aircraft is not moving You would use this function occasionally if you see an airspeed reading when the
aircraft is at rest This may be caused by aging of the built in pressure sensor or related electronics When this function is
performed make sure that there is no air flow into the pitot tube as this would result in an incorrect internal calibration
ASI Unit:
Select if you want the ASI to be displayed in mph (statute miles per hour), km/h (kilometers per hour) or kts (nautical miles
per hour)
ASI Filter:
This function can be used to select the signal filter time constant Selections are "NONE", “FAST” or “SLOW” This
selection influences the rate at which your ASI can change its reading If you have an installation that suffers from strong
turbulence at the pitot tube, select “slow” If you have a very clean airflow in front of the pilot tube you can select “fast”
which will give you a faster response to airspeed changes
ASI Span:
Select the maximum airspeed that you want the airspeed tape to display This can give you increased display resolution
ASI In View:
Adjust this setting to set the amount of tape to view For example, setting this value to 30% and your "ASI SPAN" to 250
will result in the tape showing 75 on the display at a time
Vne Speed: (Max Exceed Speed)
Enter you maximum speed you aircraft should not exceed
Vno Speed: (Max Maneuvering Speed)
Enter your maximum maneuvering speed
Vfe Speed: (Max Flap Speed)
Enter the maximum speed that is permissible with the flaps extended
Vs Speed: (Min Safe Speed, Normal)
Enter your minimum safe speed for normal flight of your aircraft
Vs0 Speed: (Min Safe Speed, Landing)
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
