From b2e599e2deb67028a277449b3bb9176b48d477a0 Mon Sep 17 00:00:00 2001 From: Robin Clark Date: Thu, 25 Mar 2010 08:58:48 +0000 Subject: [PATCH] lme --- pt100/pt100.tex | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/pt100/pt100.tex b/pt100/pt100.tex index a6c9f28..1afed32 100644 --- a/pt100/pt100.tex +++ b/pt100/pt100.tex @@ -372,7 +372,7 @@ hours of operation. This figure is referred to as a FIT\footnote{FIT values are A thermistor, bead type, non military spec is given a FIT of 3150. -Using the RIAC finding we can draw up the following table \ref{tab:stat_single}, +Using the RIAC finding we can draw up the following table (table \ref{tab:stat_single}), showing the FIT values for all faults considered. @@ -405,6 +405,10 @@ test cases. The PT100 circuit here has a FIT of 3177.6. A Probablistic tree can now be drawn, with a FIT value for the PT100 circuit and FIT values for all the component fault modes that it was calculated from. +We can see from this that that the most likely fault is the thermistor going OPEN. +This circuit is 8 times more likely to fail in this way than in any other. +Were we to need a more reliable temperature sensor this would probably +be the fault~mode we would scrutinise first. \begin{figure}[h+]