Kontron ETX-OH User Manual download pdf (Page 17)

ETX-OH / Specification

3.7 MTBF

The following MTBF (Mean Time Before Failure) values were calculated using a combination of manufacturer’s test data, if

the data was available, and the Telcordia (Bellcore) issue 2 calculation for the remaining parts.

The calculation method used is “Bellcore Method 1 Case 1” in a ground benign, controlled environment (GB,GC). This

particular method takes into account varying temperature and stress data and the system is assumed to have not been

burned in.

Other environmental stresses (extreme altitude, vibration, salt water exposure, etc) lower MTBF values.

System MTBF (hours): 212866 @ 40°C

Fans usually shipped with Kontron Europe GmbH products have 50,000-hour typical

operating life. The above estimates assume no fan, but a passive heat sinking arrangement

Estimated RTC battery life (as opposed to battery failures) is not accounted for in the above

figures and need to be considered separately. Battery life depends on both temperature

and operating conditions. When the Kontron unit has external power; the only battery

drain is from leakage paths.

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Kontron ETX-OH User Manual Page 17