Intel D845HV Product Specification - Page 83
Reliability, 14 Environmental
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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)