• Idle and Standby timers
Each time the drive performs an Active function (read, write or seek), the standby timer is reinitialized and begins counting down from its specified delay times to zero. If the standby timer reaches zero before any drive activity is required, the drive makes a transition to Standby mode. In both Idle and Standby mode, the drive accepts all commands and returns to Active mode when disc access is necessary.
3.10Environmental specifications
This section provides the temperature, humidity, shock, and vibration specifications for Momentus XT drives.
3.10.1Ambient 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) |
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Nonoperating: | |
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3.10.2Temperature gradient
Operating | 20°C per hour (68°F per hour max), without condensation |
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Nonoperating | 35°C per hour (95°F per hour max), without condensation |
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3.10.3Relative humidity
Operating | 5% to 95% noncondensing (30% per hour max) |
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Nonoperating | 5% to 95% noncondensing (30% per hour max) |
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3.10.4Wet bulb temperature
Operating | 37.7°C (99.8°F max) |
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Nonoperating | 40°C (104°F max) |
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3.10.5Altitude
Operating | |
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Nonoperating | |
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3.10.6Shock
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.
3.10.6.1Operating shock
These drives comply with the performance levels specified in this document when subjected to a maximum operating shock of 350 Gs based on
12 | Momentus XT Product Manual, Rev. D |
