Intel DH55HC Intel Desktop Board DH55HC Technical Product Specification - Page 57

Reliability, Environmental

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Technical Reference 2.7 Reliability The Mean Time Between Failures (MTBF) prediction is calculated using component and subassembly random failure rates. The calculation is based on the Bellcore Reliability Prediction Procedure, TR-NWT-000332, Issue 4, September 1991. The MTBF prediction is used to estimate repair rates and spare parts requirements. The MTBF data is calculated from predicted data at 50 ºC. The MTBF for the board is 138,157 hours. 2.8 Environmental Table 33 lists the environmental specifications for the board. Table 33. Environmental Specifications Parameter Temperature Non-Operating Operating Shock Unpackaged Packaged Vibration Unpackaged Specification -40 °C to +60 °C 0 °C to +40 °C 50 g trapezoidal waveform Velocity change of 170 inches/second² Drop Product Weight (pounds) Free Fall (inches) =20 and =40 and =80 and =100 and =121 18 50 Hz to 500 Hz , 3.13G_rms random Velocity Change (inches/sec²) N/A N/A N/A N/A N/A N/A Packaged 5 Hz to 40 Hz: 0.015 g² Hz (flat) 40 Hz to 500 Hz: 0.015 g² Hz sloping down to 0.00015 g² Hz 57

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Technical Reference
57
2.7
Reliability
The Mean Time Between Failures (MTBF) prediction is calculated using component and
subassembly random failure rates.
The calculation is based on the Bellcore Reliability
Prediction Procedure, TR-NWT-000332, Issue 4, September 1991.
The MTBF
prediction is used to estimate repair rates and spare parts requirements.
The MTBF data is calculated from predicted data at 50 ºC.
The MTBF for the board is
138,157 hours.
2.8
Environmental
Table 33 lists the environmental specifications for the board.
Table 33.
Environmental Specifications
Parameter
Specification
Temperature
Non-Operating
-40
°
C to +60
°
C
Operating
0
°
C to +40
°
C
Shock
Unpackaged
50 g trapezoidal waveform
Velocity change of 170 inches/second²
Packaged
Drop
Product Weight (pounds)
Free Fall (inches)
Velocity Change (inches/sec²)
<20
36
N/A
>=20 and <40
30
N/A
>=40 and <80
24
N/A
>=80 and <100
18
N/A
>=100 and <120
24
N/A
>=121
18
N/A
Vibration
Unpackaged
50 Hz to 500 Hz , 3.13G_rms random
Packaged
5 Hz to 40 Hz:
0.015 g² Hz (flat)
40 Hz to 500 Hz:
0.015 g² Hz sloping down to 0.00015 g² Hz