Kontron COMe Ref. Carrier T2 - Manual (Page 16)

COM Express™ miniBaseboard Type 2 / Specification
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3.5 Environmental Specification
Ambient temperature
» Operating: 0 to +60 °C
» Non-operating: -30 to +85 °C
Humidity
» Operating: 10% to 90% (non condensing)
» Non operating: 5% to 95% (non condensing)
3.6 MTBF
The following MTBF (Mean Time Between Failures) values were calculated using a combination of manufacturer‟s test
data, if the data was available, and a Bellcore calculation for the remaining parts. The Bellcore calculation used is
“Method 1 Case 1”. In that particular method the components are assumed to be operating at a 50 % stress level in a
40° C ambient environment and the system is assumed to have not been burned in. Manufacturer‟s data has been
used wherever possible. The manufacturer‟s data, when used, is specified at 50° C, so in that sense the following
results are slightly conservative. The MTBF values shown below are for a 40° C in an office or telecommunications
environment. Higher temperatures and other environmental stresses (extreme altitude, vibration, salt water
exposure, etc.) lower MTBF values.
» System MTBF ETXexpress® miniBaseboard: 192796 hours
» System MTBF COM Express™ miniBaseboard Type 2: 144767 hours