Narco Avionics AR850 Installation And Operation Manual - page 9
GENERAL INFORMATION
SECTION 1
7/03
1-5
1.7 TSO EXPLANATION
The AR850 is designed to be remote mounted within a non-
pressurized but controlled temperature location within an aircraft
that is operated up to 30,700 MSL.
This equipment requires direct current power, but may be installed
in aircraft having additional on-board alternating current
sources.
There are 18 "Environmental Test Procedures" established in RTCA
Document DO-160B, dated July 1984. These are identified on the TSO
Nameplate. The following identifies the Environmental Categories
to which the AR850's are designed, the sections of DO-160B
covering the test procedures, and an explanation of each category.
Temperature and Altitude (Section 4.0 Rev. 1)
│ Temperature Variation (Section 5)
│ │ Humidity (Section 6)
│ │ │ Vibration (Section 8)
│ │ │ │ Explosion (Section 9)
│ │ │ │ │ Waterproofness (Section 10)
│ │ │ │ │ │ Fluid Susceptibility (Section 11)
│ │ │ │ │ │ │ Sand and Dust (Section 12)
│ │ │ │ │ │ │ │
B1/B/A/NMO/X X X X X X Z B B B B B B
│ │ │ │ │ │ │ │ │
Fungus Resistance (Section 13)│ │ │ │ │ │ │ │
Salt Spray (Section 14)│ │ │ │ │ │ │
Magnetic Effect (Section 15)│ │ │ │ │ │
Power Input (Section 16)│ │ │ │ │
Voltage Spike (Section 17)│ │ │ │
Audio Frequency Conducted Susceptibility (Section 18)│ │ │
Induced Signal Susceptibility (Section 19)│ │
Radio Frequency Susceptibility (Section 20)│
Emission of Radio Frequency Energy (Section 21)
* AR850 also tested for shock operation (Sections 7, 7.2, 7.3).
Temperature and Altitude - Category B1
Temperature, Operating:
Low Operating Temperature
-20
°C (-4°F)
High operating Temperature
+55
°C (+131°F)
Short Time Operating Temperature, High
+70
°C (+158°F)
Temperature, Non-Operating:
Ground Survival Temperature, Low
-55
°C (-67°F)
Ground Survival Temperature, High
+85
°C (+185°F)
Altitude, Non-Pressurized:
7,620 M (25,000 ft.)