Garmin MX20 Installation Manual - page 77
Environmental
Qualifications
MX20 Installation Manual
560-1025-09 Rev E
67
7 Environmental Qualifications
The MX20 has been tested to the following environmental categories per procedures defined in
RTCA/DO-160D.
Table 7-1. Environmental Qualification Form
Part No:
TSO/-JTSO
No:
430-0270-0( )
C110a
C113
430-0270-5( )
C110a
C113
430-0270-6( )
C110a
C113
C118
C147
430-0270-7( )
C63c/2C63c
C110a
C113
C118
C147
430-0270-8( )
C110a
C113
C118
C147
430-0270-9( )
C63c/2C63c
C110a
C113
C118
C147
Manufacturer: Garmin AT, Inc. 2345 Turner Road SE Salem, Oregon 97302
Conditions
Section Description of Conducted Tests
Temperature and Altitude
4.0
Equipment tested to Category A1 and C1 with
Operating Temp
-20
C to +55C
Short Time High Temperature
+ 70
C
Ground Survival Temperature
-55
C to +85C
In-flight Loss of Cooling
4.5.4
No cooling required
Altitude
4.6.1
Equipment tested to 35,000 feet
Decompression
4.6.2
Equipment tested 8K to 35K in < 15 seconds
Overpressure
4.6.3
Equipment tested for overpressure
Temperature Variation
5.0
Equipment tested to Category C, 2
C/minute
Humidity
6.0
Equipment tested to Category A, standard humidity environment
Operational Shocks and Crash Safety
7
Equipment tested to Category B5R for both operational and
crash safety shocks. (Equipment operated normally after the
crash safety shocks.)
Vibration
8.0
Standard vibration Category S (curves M and B)
Robust Helicopter Vibration Category U (curves F and F1) [1]
Explosion Proofness
9.0
Equipment identified as Category X, no test required
Waterproofness
10.0
Equipment identified as Category X, no test required
Fluids Susceptibility
11.0
Equipment identified as Category X, no test required
Sand and Dust
12.0
Equipment identified as Category X, no test required
Fungus Resistance
13.0
Equipment identified as Category X, no test required
Salt Spray
14.0
Equipment identified as Category X, no test required
Magnetic Effect
15.0
Equipment is Class Z, < 0.3 meters
Power Input
16.0
Equipment tested to Category B for 14 and 28 VDC
Voltage Spike
17.0
Equipment tested to Category A
Audio Frequency Conducted
Susceptibility - Power Inputs
18.0
Equipment tested to Category B
Induced Signal Susceptibility
19.0
Equipment tested to Category C, Z
Radio Frequency Susceptibility
(Radiated and Conducted)
20
Equipment tested to Category V (Conducted)
Equipment tested to Category V (Radiated)
Emission of Radio Frequency Energy
21
Equipment tested to Category M
Lightning Induced Transient
Susceptibility
22.0
Equipment tested to Category A3 and B2
Lightning Direct Effects
23.0
Equipment identified as Category X, no test required
Icing
24.0
Equipment identified as Category X, no test required
Electrostatic Discharge
25.0
Equipment tested to Category A
Remarks:
[1] Helicopter vibration tests performed with W
0
= 0.0392 g
2
/Hz for curve F and W
0
= 0.0785 g
2
/Hz for curve F1. These levels
create the DO-160D Figure 8-7 values of 2.97 and 4.20 grms respectively.