Seagate ST39102LC Product Manual - Page 33
Cheetah 9LP Product Manual, Rev. C, Notes., Relative humidity
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Cheetah 9LP Product Manual, Rev. C 23 Notes. [1] Section 8.3.1 describes the air-flow patterns used when generating the 1 million hours MTBF guidelines in column 2. Air flow was opposite that shown in Section 8.3.1. Local air velocity was 0.92 m/sec (180 lfpm). Inlet air temperature to the drive was 77°F (25°C), plus 9°F (5°C) temperature rise in the test enclosure (86°F/30°C ambient local to the drive). [2] Measure HDA temp at point labeled "HDA" on Figure 4. [3] PCB mounted integrated circuit case. b. Non-operating -40° to 158°F (-40° to 70°C) package ambient with a maximum gradient of 36°F (20°C) per hour. This specification assumes that the drive is packaged in the shipping container designed by Seagate for use with drive. HDA Temp. Check Point 1.0" .5" Model "LC" PCBA Model "LW" PCBA 1 U12 J6 1 U12 J6 U11 U11 J2 J4 J4 U4 U20 2 U1 U3 U7 U4 U20 2 U1 U3 U7 U18 U6 U18 U6 U14 4 U14 U5 4 3 U5 3 J1A J1 Figure 4. Locations of PCBA components listed in Table 3 6.4.2 Relative humidity The values below assume that no condensation on the drive occurs. a. Operating 5% to 95% non-condensing relative humidity with a maximum gradient of 10% per hour. b. Non-operating 5% to 95% non-condensing relative humidity.
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