Appendix B: Specification
*
Table A-5: Environmental Characteristics
Characteristics Performance Requirements
Environmental Requirements
The instrument meets the following MIL-T-28800D require
ments for Type III, Class 5, Style D equipment, except where
noted otherwise.1
Temperature
Operating
0° C to +50° C (+32° F to +122° F)1
Nonoperating
-40° C to +71° C (-40° F to +160° F)1
Tested to MIL-T-28800D, para 4.5.5.1.3 and 4.5.5.1.4, except
that in para 4.5.5.1.3 steps 4 and 5 (-10° C operating test)
are performed before step 2 (-40° C nonoperating test).
Equipment shall remain off upon return to room ambient tem
perature during step 6. Excessive condensation shall be re
moved before operating during step 7.
Altitude
Operating To 4,500 meters (13,716 feet)1
Maximum operating temperature decreases 1 ° C per 1,000
feet above 5,000 feet.
Nonoperating To 15,240 meters (50,000 feet)1
Exceeds requirements of MIL-T-2880D, para 4.5.5.2.
Humidity
Operating and Nonoperating 5 cycles (120 hours) referenced to M1L-T-28800D para
4.5.5.1.2.2 for Type III, Class 5 instruments. Operating and
nonoperating at 95%, -5% to +0%, relative humidity. Operat
ing, + 30s Cto +50° C; nonoperating, +30° Cto +60° C.1
EMI (eiectromagnetic interference)
Meets radiated and conducted emission requirements per
VDE 0871, Class B.1
To meet EMI regulations and specifications, use a double
shielded cable and metal connector housing with the housing
grounded to the cable shield on the AUXILIARY CONNEC
TOR.
Vibration
Operating
15 minutes along each of three major axes at a total displace
ment of 0.015 inch p-p (2.3 g at 55 Hz) with frequency varied
from 10 Hz to 55 Hz to 10 Hz in one-minute sweeps. Hold for
10 minutes at 55 Hz in each of the three major axes. All major
resonances are above 55 Hz.1
Meets requirements of MIL-T-228000, para 4.5.5.3.1.
Performance requirement not checked in manual.
A-22 Appendices
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