KONTRON
coolMONSTER/S User’s Guide
11
Specifications
4.4
MTBF
The following MTBF (Mean Time Between Failure) 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”. Using this method, 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 office or telecommunications
environment. Higher temperatures and other environmental stresses such as extreme altitude,
vibration, and salt-water exposure will lower the MTBF values.
System MTBF (hours) : 221390
Notes:
Fans shipped with Kontron Embedded Modules GmbH products have 50,000-
hours of typical operating life.
The estimates assume that a passive heat sink is used.
Estimated RTC battery life (as opposed to battery failures) is not accounted for in
the above figures and needs to be considered separately. Battery life depends on
temperature and operating conditions. When the Kontron unit has external power;
battery drain occurs from leakage paths.
4.5
Environmental Specifications
4.5.1.
Temperature
The Intel Pentium
Processor with MMX
Technology on 0.25 Micron is specified for proper
operation when case temperature is within the specified range of 0
C to 95
C.
Operating: 0 to +60°C (*) (with appropriate airflow)
Non-operating: -10 to +85
C
Note
:
The maximum operating temperature is the maximum measurable temperature on any
spot on the module’s surface. You must maintain the temperature according to the above
specification.
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