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Momentus 5400 FDE Product Manual, Rev. C
13
2.10 Environmental specifications
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.
2.10.2 Temperature gradient
2.10.3 Humidity
2.10.3.1 Relative humidity
2.10.3.2 Wet bulb temperature
2.10.4 Altitude
2.10.5 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.
2.10.5.1 Operating shock
These drives comply with the performance levels specified in this document when subjected to a maximum
operating shock of 250 Gs based on half-sine shock pulses of 2 msec. Shocks should not be repeated more
than two times per second.
Operating 5° to 55°C (41° to 131°F)
Nonoperating –40° to 70°C (–40° to 158°F)
Operating 20°C per hour (68°F per hour max), without condensation
Nonoperating 30°C per hour (86°F per hour max), without condensation
Operating 5% to 90% noncondensing (30% per hour max)
Nonoperating 5% to 95% noncondensing (30% per hour max)
Operating 30°C (86°F max)
Nonoperating 40°C (104°F max)
Operating –304.8 m to 3,048 m (–1,000 ft to 10,000 ft)
Nonoperating –304.8 m to 12,192 m (–1,000 ft to 40,000 ft)