Integrated Standby Instrument System

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Description

The Integrated Standby Instrument System (ISIS) integrates the 4 classical standby instruments (Compass, Horizon, Airspeed, Altimeter) into one single instrument.

The ISIS system displays the following information:

• Attitude
• Airspeed and mach
• Altitude
• Barometric pressure
• LS function
• Bugs

Usage

”+” / “-”

• Used to adjust the level of brightness.

LS

• Pressing the LS pb will display the LS scales. Pressing the LS pb again will remove the LS scales.

BUGS

• Pressing the BUGS pushbutton will activate the BUGS function and display the bug values to be selected.

SPD BUG and ALT BUG columns:

• The SPD BUG column gives four speed values (in knots) that can be selected by the crew.
• The ALT BUG column gives two altitude values (feet) to be selected by the crew.

BUGS value selection knob

• It allows the bug value to be set by rotating the BARO knob. This value cannot be lower than 30 kt for a speed bug, or a negative value for an altitude bug.
• Pressing the BARO setting knob, once a bug value box is activated, will deselect the bug value.
• The “OFF” label comes on close to the activated box.
• The entered values are memorized by the system, when exiting the screen, by pressing the BUGS pushbutton (1), or after 15s without any pilot action.

“+” / ”-” box activation buttons

• Access from one box to another is obtained by pressing the “+” or “–” pushbutton.
• When a bug value is entered, access to the next box is obtained by pressing the “–” pushbutton. The box becomes active and flashes.
• The “+” pushbutton can be used to return to a previous box.

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