Dell OptiPlex 990 Mini-Tower Service Manual page 96

Environmental
Maximum shock:
Altitude:
Airborne contaminant level
96
Storage
Operating
Storage
Operating
Storage
2.2 GRMS
40 G
105 G
–15.2 m to 3048 m (–50 ft to 10,000 ft)
–15.2 m to 10,668 m (–50 ft to 35,000 ft)
G1 or lower as defined by ANSI/ISA-
S71.04-1985