Hitachi IC25N040ATCS04-0 Specifications - Page 36

6.0 Specification 6.1 Environment 6.1.1 Temperature and humidity Operating conditions Temperature 5 to 55°C (See note below) Relative humidity 8 to 90% noncondensing Maximum wet bulb temperature 29.4°C noncondensing Maximum temperature gradient 20°C/hour Altitude -300 to 3048 m (10,000 ft) Nonoperating conditions Temperature -40 to 65°C Relative humidity 5 to 95% noncondensing Maximum wet bulb temperature 40°C noncondensing Maximum temperature gradient 20°C/hour Altitude -300 to 12,192 m (40,000 ft) Figure 17. Environmental condition The system is responsible for providing sufficient air movement to maintain surface temperatures below 60°C at the center of top cover and below 63°C at the center of the drive circuit board assembly. The maximum storage period in the shipping package is one year. Relative Humidity (%) Specification (Environment) 100 90 80 31'C/90% 41'C/95% WetBulb 40'C 70 60 Non Operating WetBulb29.4'C 50 Operating 40 30 65'C/23% 20 55'C/15% 10 0 -45 -35 -25 -15 -5 5 15 25 35 45 55 65 Temperature (degC) Figure 18. Limits of temperature and humidity Hitachi Travelstar 60GH & 40GN hard disk drive specifications 23