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3.10
Environmental specifications
This section provides the temperature, humidity, shock, and vibration specifications for Momentus drives.
3.10.1
Ambient temperature
Ambient temperature is defined as the temperature of the environment immediately surrounding the drive.
Actual drive case temperature should not exceed 65°C (149°F) within the operating ambient conditions.
Above 1000 feet (305 meters), the maximum temperature is derated linearly by 1°C every 1000 feet.
Operating:
0°C to 60°C (32°F to 140°F)
Nonoperating:
–40°C to 70°C (–40°F to 158°F)
3.10.2
Temperature 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
3.10.3
Relative humidity
Operating
5% to 95% noncondensing (30% per hour max)
Nonoperating
5% to 95% noncondensing (30% per hour max)
3.10.4
Wet bulb temperature
Operating
37.7°C (99.8°F max)
Nonoperating
40°C (104°F max)
3.10.5
Altitude
Operating
–304.8 m to 3048 m (–1000 ft to 10,000+ ft)
Nonoperating
–304.8 m to 12,192 m (–1000 ft to 40,000+ ft)
3.10.6
Shock
All shock specifications assume that the drive is mounted securely with the input shock applied at the drive
mounting screws. Shock may be applied in the X, Y or Z axis.
Note.
Additional shock protection is provided by the Free Fall Protection feature on ST9750420ASG,
ST9640420ASG and ST9500423ASG models. See Section 3.13.1 for additional information about
this feature.
3.10.6.1
Operating shock
These drives comply with the performance levels specified in this document when subjected to a maximum
operating shock of 350 Gs based on half-sine shock pulses of 2ms. Shocks should not be repeated more than
one time per axis.
14
Momentus Product Manual, Rev. A
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