Table 22 Operating temperature de-rating specificationsOperating temperature de-rating SpecificationsUp to 35°C (95°F) Maximum temperature is reduced by 1°C/300 m (1°F/547 ft) above 950m (3,117 ft).35°C to 40°C (95°F to 104°F) Maximum temperature is reduced by 1°C/175 m (1°F/319 ft) above 950m (3,117 ft).40°C to 45°C (104°F to 113°F) Maximum temperature is reduced by 1°C/125 m (1°F/228 ft) above 950m (3,117 ft).Standard operating temperatureThe following table lists standard operating temperature specifications.Table 23 Standard operating temperature specificationsStandard operating temperature SpecificationsContinuous operation (for altitude less than 950 m or3117 ft)10°C to 35°C (50°F to 95°F) with no direct sunlight on the equipment.Expanded operating temperatureThe following table lists expanded operating temperature specifications for the R740xd system.Table 24 Expanded operating temperature specificationsExpanded operating temperature SpecificationsContinuous operation 5°C–40°C at 5% to 85% RH with 29°C dew point.Note: Outside the standard operating temperature (10°C–35°C), thesystem can operate continuously in temperatures as low as 5°C andas high as 40°C.For temperatures between 35°C–40°C, de-rate maximum allowabletemperature by 1°C per 175 m above 950 m (1°F per 319 ft).≤ 1% of annual operating hours –5°C–45°C at 5% to 90% RH with 29°C dew point.Note: Outside the standard operating temperature (10°C–35°C), thesystem can operate down to –5°C or up to 45°C for a maximum of1% of its annual operating hours.For temperatures between 40°C and 45°C, de-rate maximum allowabletemperature by 1°C per 125 m above 950 m (1°F per 228 ft).Note: When operating in the expanded temperature range, system performance may be impacted.Note: When operating in the expanded temperature range, ambient temperature warnings may be reported in theSystem Event Log.Technical specifications30 R740xd Owner's Guide