From a0a64ccbd8fcb27d83766b33a1a5acdb58f98531 Mon Sep 17 00:00:00 2001 From: Robin Clark Date: Thu, 24 Feb 2011 13:22:40 +0000 Subject: [PATCH] Notes from C Garrett --- pt100/pt100.tex | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/pt100/pt100.tex b/pt100/pt100.tex index 6e9bce1..1dbc9c0 100644 --- a/pt100/pt100.tex +++ b/pt100/pt100.tex @@ -677,7 +677,7 @@ TC 12: & $R_1$ SHORT $R_2$ SHORT & high & low & Both out of ran TC 14: & $R_1$ SHORT $R_3$ SHORT & high & high & Both out of range \\ \hline \hline - TC 15: & $R_2$ OPEN $R_3$ SHORT & high & Floating input Fault & sense+ out of range \\ \hline + TC 15: & $R_2$ OPEN $R_3$ OPEN & high & Floating input Fault & sense+ out of range \\ \hline TC 16: & $R_2$ OPEN $R_3$ SHORT & high & high & Both out of Range \\ \hline TC 17: & $R_2$ SHORT $R_3$ OPEN & high & low & Both out of Range \\ \hline TC 18: & $R_2$ SHORT $R_3$ SHORT & low & low & Both out of Range \\ \hline @@ -864,13 +864,13 @@ a given cardinality constraint is not visually obvious. \subsubsection{Symptom Extraction} We can now examine the results of the test case analysis and apply symptom abstraction. -In all the test case results we have at least one an out of range value, except for +In all the test case results we have at least one out of range value, except for $TC\_7$ which has two unknown values/floating readings. We can collect all the faults, except $TC\_7$, into the symptom $OUT\_OF\_RANGE$. As a symptom $TC\_7$ could be described as $FLOATING$. We can thus draw a PLD diagram representing the failure modes of this functional~group, the pt100 circuit from the perspective of double simultaneous failures, -in figure \ref{fig:dubsim}. +in figure \ref{fig:pt100_doublef}. \begin{figure}[h]