Seagate ST9500420AS Momentus 7200.4 SATA Product Manual - Page 17

2.10 Environmental specifications This section provides the temperature, humidity, shock, and vibration specifications for Momentus 7200.4 SATA drives. 2.10.1 Ambient temperature Ambient temperature is defined as the temperature of the environment immediately surrounding the drive. Actual drive case temperature should not exceed 65°C (149°F) within the operating ambient conditions. Above 1,000 feet (305 meters), the maximum temperature is derated linearly by 1°C every 1000 feet. Operating: Nonoperating: 0°C to 60°C (32°F to 140°F) -40°C to 70°C (-40°F to 158°F) 2.10.2 Temperature gradient Operating Nonoperating 20°C per hour (68°F per hour max), without condensation 35°C per hour (95°F per hour max), without condensation 2.10.3 Relative humidity Operating Nonoperating 5% to 95% noncondensing (30% per hour max) 5% to 95% noncondensing (30% per hour max) 2.10.4 Wet bulb temperature Operating Nonoperating 37.7°C (99.8°F max) 40°C (104°F max) 2.10.5 Altitude Operating Nonoperating -304.8 m to 3,048 m (-1,000 ft to 10,000+ ft) -304.8 m to 12,192 m (-1,000 ft to 40,000+ ft) 2.10.6 Shock All shock specifications assume that the drive is mounted securely with the input shock applied at the drive mounting screws. Shock may be applied in the X, Y or Z axis. Note. Additional shock protection is provided by the Free Fall Protection feature on ST9500420ASG, ST9320423ASG, ST9250410ASG, ST9160412ASG, and ST9120410ASG models. See Section 2.13.1 for additional information about this feature. 2.10.6.1 Operating shock These drives comply with the performance levels specified in this document when subjected to a maximum operating shock of 350 Gs based on half-sine shock pulses of 2 msec. Shocks should not be repeated more than one time per axis. Momentus 7200.4 SATA Product Manual, Rev. A 11