Astronics Max-Viz 1500, Информационное руководство

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Astronics Max-Viz Max-Viz 1500 3091-00019 Rev M
6. WARNINGS, CAUTIONS, AND GUIDANCE
6.1. Electromagnetic Interference
The Max-Viz 1500 system is qualified (RTCA/DO-160) to operate in normal aircraft EMI
environments.
When installing the system, be sure that the Sensor window is
not installed in close proximity to high power EMI transmitters, such as
transponders.
High energy transmitters mounted directly in front of the germanium
lens may cause video disturbance.
Particular attention must be taken in routing the RS-170 video coax cable through the
aircraft structure to avoid potential RFI from noise items. It is highly recommended to
avoid routing the video coax in close proximity to electrical noise sources such as
motors, generators, transmitters, etc. Do not lace the video coax cable together (in
parallel) with high current conductors, particularly AC power type wires such as 115 Vac
400 Hz or 60Hz.
6.2. Germanium Window Breakage
The Sensor window is made of Germanium. If this window is ever broken, use extreme
caution when handling broken germanium shards or dust.
Always use gloves and
masks when handling broken germanium window material.
6.3. Germanium Window Cleaning
In contrast to visible light energy, infrared energy typically passes through dirt or bug-
debris build-up on the window. As such, the Sensor window requires only occasional
cleaning with mild liquid soap and water or isopropyl alcohol, and a soft cloth.
Do not use abrasive cleansers or cleaning pads on the germanium window.
Abrasive cleaning can damage the window coating. The use of products such as
Corrosion X can damage the RTV seals and coating on the germanium window.
Do not
use any cleansers with ammonia. Ammonia will remove the window coating.
6.4. Halo Images
Under certain circumstances, it is possible a “halo” will be seen around the image. The
following sequence of events will occur:
 The Sensor has automatically temperature controlled heaters. When the heaters
first turn on, they will begin to heat the window from the outside-in.

As the window is heated, the infrared detector will not be able to compensate for
the signal coming from the window, as compared to the outside view, and thus a
white (hot) area will appear around the outside of the image, working its way in.