Thommen AD20 - Environmental Qualification; Operating

REVUE THOMMEN AG
CH-4437 Waldenburg
AD20 Standby Altimeter
Page 37 of 72
07-Sep-2009 Document No: AD-INSOP-800 Revision: 1.6
3.1.3 Environmental Qualification
The flight instrument will indicate readings within the limits specified under the following
environmental conditions:
Environmental Criteria Requirement
RTCA/DO-160D
Remarks
Temperature & Altitude
Temperature:
Continuous operation
Ground Survival Temperature
Operating Low Temperature
Operating High Temperature
Short Time Operating High
Temperature
Altitude
Decompression
Overpressure
static port of the instrument
RTCA/DO-160D Section 4.0
Cat.
[F1]
from -30 to +70 °C (-22 to 158 °F)
from -55 to +85 °C (-67 to 185 °F)
Section 4.5.1
-30 °C (-22 °F)
Section 4.5.3
+70 °C (158 °F)
Section 4.5.2
+70 °C (158 °F)
Section 4.6.1
55,000 ft
Section 4.6.2
55,000 ft
Section 4.6.3
-15,000 ft
LCD limited to
- 30 °C (-22 °F)
Temperature Variation RTCA/DO-160D Section 5.0 Cat. C
2 °C/min. (36 °F/min.)
Humidity up to 95 %rH RTCA/DO-160D Section 6.0 Cat. B
Shock and Crash Safety:
Operational Shock
Crash Safety:
Impulse
Sustained
RTCA/DO-160D Section 7.0 Cat.
B
6g, 11 ms
Section 7.3
20g, 11 ms
Vibration RTCA/DO-160D Section 8.0 Cat.
[(TB1)(TR)]
without shock mounts
Explosion RTCA/DO-160D Section 9.0 Cat. X
(Environment II)
no test required