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
Ill, Class 5, Style D equipment, except where
noted otherwise.'
Temperature
Operating
Nonoperating
-40" C to +71° C (-40"
F
to +160° F)'
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 (1 3,716 feet)'
Maximum operating temperature decreases 1
"
C per 1,000
feet above 5,000 feet.
Nonoperating To 15,240 meters (50,000 feet)'
Exceeds requirements of
MIL-T-2880D, para 4.5.5.2.
4
Humidity
Zi
Operating and Nonoperating
5 cycles (1 20 hours) referenced to
MIL-T-28800D para
4.5.5.1.2.2 for Type
Ill, Class 5 instruments. Operating and
nonoperating at
95%, -5% to +O%, relative humidity. Operat-
zi
ing, +30° C to +50° C; nonoperating, +30° C to +60° C.'
EM1 (electromagnetic interference)
Meets radiated and conducted emission requirements per
VDE 0871, Class
6.'
To meet EM1 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.'
Meets requirements of MIL-T-22800D, para 4.5.5.3.1.
'Performance requirement not checked in manual.
A-22
Appendices
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