Intel D845HV Product Specification - Page 83

Reliability, 14 Environmental

Page 83 highlights

Technical Reference 2.13 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 Mean Time Between Failures (MTBF) data is calculated from predicted data at 55 ºC. The MTBF calculations for the boards are as follows: • D845HV board MTBF: 147370.4687 hours • D845WN board MTBF: 126077.3308 hours 2.14 Environmental Table 54 lists the environmental specifications for the D845HV and D845WN boards. Table 54. D845HV/D845WN Board Environmental Specifications Parameter Specification Temperature Non-Operating -40 °C to +70 °C Operating 0 °C to +55 °C Shock Unpackaged 50 g trapezoidal waveform Velocity change of 170 inches/second Packaged Half sine 2 millisecond Product Weight (pounds) Free Fall (inches) Velocity Change (inches/sec)

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Technical Reference
83
2.13 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 Mean Time Between Failures (MTBF) data is calculated from predicted data at 55 ºC.
The
MTBF calculations for the boards are as follows:
D845HV board MTBF:
147370.4687 hours
D845WN board MTBF:
126077.3308 hours
2.14 Environmental
Table 54 lists the environmental specifications for the D845HV and D845WN boards.
Table 54.
D845HV/D845WN Board Environmental Specifications
Parameter
Specification
Temperature
Non-Operating
-40
°
C to +70
°
C
Operating
0
°
C to +55
°
C
Shock
Unpackaged
50 g trapezoidal waveform
Velocity change of 170 inches/second
Packaged
Half sine 2 millisecond
Product Weight (pounds)
Free Fall (inches)
Velocity Change (inches/sec)
<20
36
167
21-40
30
152
41-80
24
136
81-100
18
118
Vibration
Unpackaged
5 Hz to 20 Hz:
0.01 g² Hz sloping up to 0.02 g² Hz
20 Hz to 500 Hz:
0.02 g² Hz (flat)
Packaged
10 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