Fujitsu MHD2021AT Drill User Manual


 
Device Overview
1-8 C141-E050-02EN
(5) Power on/off sequence
The voltage detector circuits (the MHC Series and MHD Series) monitor +5 V.
The circuits do not allow a write signal if either voltage is abnormal. These
prevent data from being destroyed and eliminates the need to be concerned with
the power on/off sequence.
1.4 Environmental Specifications
Table 1.5 lists the environmental specifications.
Table 1.5 Environmental specifications
Temperature
Operating
Non-operating
Thermal Gradient
5°C to 55°C (ambient)
5°C to 60°C (disk enclosure surface)
40°C to 65°C
20°C/h or less
Humidity
Operating
Non-operating
Maximum Wet Bulb
8% to 90% RH (Non-condensing)
5% to 95% RH (Non-condensing)
29°C
Altitude (relative to sea level)
Operating
Non-operating
300 to 3,000 m
300 to 12,000 m
1.5 Acoustic Noise
Table 1.6 lists the acoustic noise specification.
Table 1.6 Acoustic noise specification
Sound Pressure
Idle mode (DRIVE READY)
30 dBA typical at 1 m