Seagate ST250LT011 - 9ZVG4C manual Ambient temperature, Temperature gradient, Wet bulb temperature

3.10Environmental specifications

3.10.1Ambient temperature

Ambient temperature is defined as the temperature of the environment immediately surrounding the drive. Above 1000 feet (305 meters), the maximum temperature is derated linearly by 1°C every 1000 feet.

Operating:	0° to 60°C (32° to 140°F)
Nonoperating:	–40° to 70°C (–40° to 158°F)

3.10.2Temperature gradient

Operating	20°C per hour (68°F per hour max), without condensation
Nonoperating	35°C per hour (95°F per hour max), without condensation

3.10.3Humidity

3.10.3.1Relative humidity

Operating	5% to 95% noncondensing (30% per hour max)
Nonoperating	5% to 95% noncondensing (30% per hour max)

3.10.3.2Wet bulb temperature

Operating	37.7°C (99.86°F max)
Nonoperating	40°C (104°F max)

3.10.4Altitude

Operating	–304.8 m to 3,048 m (–1000 ft to 10,000+ ft)
Nonoperating	–304.8 m to 12,192 m (–1000 ft to 40,000+ ft)

12 Momentus Thin Product Manual, Rev. C Gen-2