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2.8 Air Circulation and Cooling
The GTR 200/200B unit meets all requirements without external cooling. However, as with all electronic
equipment, lower operating temperatures extends equipment life. Reducing the operating temperature by
15° to 20°C (27° to 36°F) reduces the mean time between failures (MTBF).
Units tightly packed in the avionics stack heat each other through radiation, convection, and sometimes by
direct conduction. Even a single unit operates at a much higher temperature in still air than in moving air.
Fans or some other means of moving the air around electronic equipment are usually a worthwhile
investment.
2.9 Compass Safe Distance
After reconfiguring the avionics in the cockpit panel, if the unit is mounted less than 12 inches from the
compass, recalibrate the compass and make the necessary changes for noting correction data.
190-01553-00
GTR 200/200B Installation Manual
Rev. P
Page 2-7
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