ST1.3 Series Product Manual, Rev. C 11
2.8 Environmental specifications
2.8.1 Ambient temperature
Ambient temperature is defined as the temperature of the environment immediately surrounding the drive.
Actual drive case temperature should not exceed 70°C (158°F) within the operating ambient conditions. Case
temperature of the drive operating at 60°C ambient may hit a maximum of 70°C at certain parts of the casing.
Above 1,000 feet (305 meters), the maximum temperature is derated linearly by 1°C every 1000 feet.
2.8.2 Temperature gradient
2.8.3 Humidity
2.8.3.1 Relative humidity
2.8.3.2 Wet bulb temperature
[1] Operating: Wet bulb temperature is calculated by the operating Temperature and the Relative Humidity levels.
[2] Nonoperating: Wet bulb temperature is calculated by the nonoperating Temperature and the Relative Humidity levels.
2.8.4 Altitude
Operating 0° to 60°C (32° to 140°F) (70°C max case temperature)
Nonoperating –40° to 70°C (–40° to 158°F)
Operating 20°C per hour (36°F per hour max), without condensation
Nonoperating 30°C per hour (54°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 33°C (91.4°F max) [1]
Nonoperating 40°C (104°F max) [2]
Operating –60.98 m to 3,048 m (–200 ft to 10,000+ ft)
Nonoperating –60.98 to 12,192 m (–200 ft to 40,000+ ft)