图尔克压力变送器，PT025R-14-LI3-H1131[产品打印页面]

图尔克压力变送器，PT025R-14-LI3-H1131
Version History: V3R0: IM1-12-R, IM1-12
-T and IM1-22-T added; February 21, 2014
V2R0: IM1-22-R added; February 8, 2013
V1, R1.0: External review comments integrated; April 14, 2005
V0, R2.0: Internal review comments integrated; March 31, 2005
附录1.1：可能的验证测试，以检测未检测到的危险故障
验证试验包括下列步骤的，如表11所述。
1采取适当的行动，以避免误行程
2提供NAMUR控制信号给隔离开关放大器打开/关闭
输出并验证输出为开/关。
Therefore it is obvious that the PFDAVG calcu
lation is only valid for components which have this
constant domain and that the validity of th
e calculation is limited to the useful lifetime of each
It is assumed that early failures are detecte
a huge percentage during the installation period
and therefore the assumption of a constant fail
ure rate during the useful lifetime is valid.
在FMEDA过程中发现可在验证测试进行检测。
表8，表9和表10示出重要的危险的重要性分析
未检测到故障，并指出如何将这些故障可在验证测试进行检测。
附录1应编写安全手册的时候，因为它包含重要的安全考虑
The circuits of the Isolating Switching Amplifie
rs IM1-(Ex)- and MK13-R-Ex0 do not contain
any electrolytic capacitors or other componen
ts that are contributing to the dangerous
undetected failure rate. Therefore there is no
limiting factor with regard to the useful lifetime of
However, according to section 7.4.7.4 of IEC
 61508-2, a useful lifetime, based on experience,
should be assumed. According to sectio
n 7.4.7.4 note 3 of IEC 61508-2 experience has shown
that the useful lifetime often lies within a range of 8 to 12 years.
这个测试将检测90％以上的
隔离开关放大器的可能“嘟”的故障。
V0, R1.0: Initial version; March 11, 2005
Authors: Stephan Aschenbrenner
根据IEC第7.4.3.2.2六）61508-2验证测试应采取以揭示
危险故障这是由诊断试验检测到。
这意味着，既要指定如何危险不能检测的故障已被

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