Cirrus SR22 Maintenance Manual

C I R R U S
A I R P L A N E M A I N T E N A N C E M A N U A L
1. DESCRIPTION
That portion of the system that uses heat sensing devices such as infra-red scanners, infra-red image and
detection to acquire information. This includes the Enhanced Vision System.
The Enhanced Vision System (EVS) is an electro-optical system that uses a Long-Wave Infrared (IR) cam-
era to enhance situational awareness. Infrared red is particularly effective at night, smoke, haze, and smog
in addition to a broad spectrum of rain, snow, and radiation-type fog. 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 pro-
duces a infrared image and a low-light CMOS camera that produces a visible image. The two images are
then combined to produce a single monochrome image that is transmitted directly to the MFD. Upon
power-up the sensor requires approximately 90 seconds to produce a usable image.
28 VDC for Enhanced Vision System operation is supplied through the 5-amp EVS CAMERA circuit
breaker on Main Bus 3. Refer to the manufacturer's approved Instructions For Continued Airworthiness.
EFFECTIVITY:
All
INFRARED SENSORS
M O D E L S S R 2 2 A N D S R 2 2 T
93-50
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15 Jun 2010