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36
7.3
7.4
7.4.1
7.4.2
ST15150N/ND/W/WD/WC/DC Product Manual, Rev. D
Heat/power dissipation
The heat and power dissipation values for your drive are listed below.
Typical seek and read
power dissipation of DC power
average at nominal voltages
Typical power dissipation
under idle conditions
Environmental limits
Temperature and humidity must not cause condensation within the drive.
Altitude and atmospheric pressure specifications are referenced to a stan-
dard day at 58.7°F (14.8°C). Maximum wet bulb temperature is 82°F (28°C).
Temperature
a. Operating
The MTBF specification for the drive is based on operating at a local
ambient temperature of 95°F (35°C). Occasional excursions to drive
ambient temperatures of 122°F (50°C) may occur without impact to
specified MTBF. The enclosure for the drive should be designed such that
the temperatures at the locations specified in Figures 7, 8, 9, 10, 11, and
12 are not exceeded. Air flow may be needed to achieve these tempera-
tures. Continual or sustained operation at case temperatures above
these values may degrade MTBF.
The drive meets all specifications within a 41° to 122°F (5° to 50°C) drive
ambient temperature range with a maximum gradient of 36°F (20°C) per
hour.
b. Non-operating
Non-operating temperature should remain between –40° to 158°F (–40° to
70°C) package ambient with a maximum gradient of 36°F (20°C) per
hour. This assumes that the drive is packaged in the shipping container
designed by Seagate.
Relative humidity
The values below assume that no condensation on the drive occurs.
a. Operating
5% to 95% relative humidity with a maximum gradient of 10% per hour
b. Non-operating
5% to 95% relative humidity
ST15150N/W/WC ST15150ND/WD/DC
15W
16W
(51 BTUs/hr)
(54 BTUs/hr)
12W
12W
(41 BTUs/hr)
(41 BTUs/hr)
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