Table of Contents
Advertisement
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: tbd hours
9
COM Express® Eval Type 10 / Specification
Advertisement
Table of Contents
