formatting

pt100/pt100.tex

@@ -22,6 +22,29 @@ Thus after the analysis the PT100 temperature sensing circuit, may be veiwed
 from an FMEA persepective as a component itself, with a set of known failure modes.
 
 \end{abstract}
+}
+{
+
+\section{Overview}
+The PT100, or platinum wire \ohms{100} sensor is 
+a widely used industrial temperature sensor that is
+slowly replacing the use of thermocouples in many 
+industrial applications below 600\oc, due to high accuracy\cite{aoe}.
+
+This chapter looks at the most common configuration, the 
+four wire circuit, and analyses it from an FMEA perspective twice.
+Once considering single faults (cardinality constrained powerset of 1) and then again, considering the 
+possibility of double faults (cardinality constrained powerset of 2).
+
+The analysis is performed using Propositional Logic
+diagrams to assist the reasoning process.
+This chapter describes taking
+the failure modes of the components, analysing the circuit using FMEA
+and producing a failure mode model for the circuit as a whole.
+Thus after the analysis the PT100 temperature sensing circuit, may be veiwed 
+from an FMEA persepective as a component itself, with a set of known failure modes.
+
+
 }
 
 \begin{figure}[h]
@@ -33,7 +56,7 @@ from an FMEA persepective as a component itself, with a set of known failure mod
 \end{figure}
 
 
-\section{Overview of PT100 four wire circuit}
+\section{General Description of PT100 four wire circuit}
 
 The PT100 four wire circuit uses two wires to supply small electrical current,
 and returns two sense volages by the other two.