COMe-bTL6 - User Guide. Rev. 1.5
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Kontron is not responsible for any radio television interference caused by unauthorized
modifications of the delivered product or the substitution or attachment of connecting
cables and equipment other than those specified by Kontron. The correction of interference
caused by unauthorized modification, substitution or attachment is the user’s responsibility.
2.7.1.
MTBF
The MTBF (Mean Time Before Failure) values were calculated using a combination of the manufacturer’s test data, (if
available) and the Telcordia (Bellcore) issue 2, calculation for the remaining parts.
The Telcordia calculation used is “Method 1 Case 3” in a ground benign, controlled environment. 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 (such as extreme altitude, vibration, salt-water exposure) lower MTBF values.
Table 29: MTBF
MTBF
System MTBF (hour) = 554219 h @ 40°C for 38038-0000-26-2 (
COMe-bTL6 Celeron 6600HE HM570E)
Reliability report article number: 38038-0000-26-2
System MTBF (hour) = 490083 h @ 40°C for 38039-0010-47-0 (
COMe-bTL6 E2 W-11865MRE RM590E)
Reliability report article number: 38039-0010-47-0
The MTBF estimated value above assumes no fan, but a passive heat sinking arrangement.
Estimated RTC battery life (as opposed to battery failures) is not accounted for and needs to
be considered separately. Battery life depends on both temperature and operating
conditions. When the module is connected to external power, the only battery drain is from
leakage paths.
Figure 6 and Figure 7 show MTBF de-rating values for module variants when used in an office or telecommunications
environment. Other environmental stresses (extreme altitude, vibration, salt-water exposure, etc.) lower MTBF
values.
Figure 6: MTBF De-rating Values (Reliability report: 38038-0000-26-2)