Dell PowerVault MD3000i Getting Started Guide - Page 15

Environmental (Battery Backup Unit [BBU]) NOTE: For additional information about environmental measurements for specific system configurations, see dell.com/environmental_datasheets Maximum input power • +12 VDC +/-5% at 1 A • +3.3 VDC +/-5% at 150 mA • Operating temperature range: 5° to 35°C (41° to 95°F) Regulated output voltage from BBU • +2.5 VDC +/-3% at 20 mA to 120 mA • Operating temperature range: 5° to 45°C (41° to 113°F) Minimum retention time (life expectancy) 72 hours for 512-MB DDR-I DIMM, 2.5 V at 120 mA Working temperature range (dry bulb) • 5° to 35°C (41° to 95°F) • Maximum dry bulb temperature derated by 3.3°C (37.9°F) per 1000 m (3281 ft) above 500 m (1640 ft) Working relative humidity range 5% to 90% noncondensing Storage temperature range (dry bulb) • -10° to 45°C (14° to 113°F) for 3 months maximum • Maximum dry bulb temperature derated by 3.3°C (37.9°F, guaranteed) per 1000 m (3281 ft) above 500 m (1640 ft) Transit temperature range (dry bulb) -20° to 60°C (-4° to 140°F) for 1 week maximum Storage and transit humidity range 5% to 95% relative humidity Storage and transit maximum temperature gradient 1°C (33.8°F) per minute to a maximum of 20°C (68°F) per hour Storage and transit maximum humidity 30% relative humidity per hour gradient Getting Started With Your System 13