Cirrus Design Section 7
SR22 Systems Description
P/N 13772-004 7-93P/N 13772-004 7-93
Max Viz Enhanced Vision System
The Enhanced Vision System is an electro-optical system that uses a
Long-Wave Infrared (IR) camera. Infrared is particularly effective at
night, smoke, haze, and smog in addition to a broad spectrum of rain,
snow, and radiation-type fog. However, penetration is limited during
certain environmental conditions associated with heavy rain, heavy
snow, coastal fog and most cloud formations. Therefore the EVS is not
intended for all atmospheric conditions and may only be used for
acquisition of objects normally viewed through the cockpit windows.
EVS is an aid to visual acquisitions of:
• Ground vehicles and other ground-based equipment/obstacles,
• Aircraft on taxi-ways and runways,
• Other traffic during takeoff, approach, and landing,
• Runway and taxi lights,
• Runway and terrain features during climb, descent, and low
altitude maneuvering.
The EVS sensor, located on the underside of the LH wing, contains a
long-wave infrared camera that produces a infrared image and a low-
light CMOS camera that produces a visible image. The two images
are then combined to produce a single fused image and transmitted
directly to the MFD. Upon power-up the Sensor requires
approximately 90 seconds to produce a usable image. The image
generated is a monochrome image. The hotter an object is the whiter it
appears on the display.
28 VDC Enhanced Vision System operation is supplied through the 5-
amp EVS CAMERA circuit breaker on MAIN BUS 3. Refer to the Max
Viz Enhanced Vision System Pilot’s Guide for a detailed discussion of
the system. For maintenance information and special precautions to
be followed, refer to Section 8, Enhanced Vision System Sensor
Windows (Optional).
Revision 1
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