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\newcommand{\axaf}{{\em AXAF}}
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\large
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\centerline {\bf 1.6\_V2.1 SET FOCAL PLANE TEMPERATURE TO -120 C }
\vspace{0.25in}

\normalsize
\noindent{\it Last Revised: June 25,1999}\\
\noindent{\bf Filename: setfp\_m120} \\


\noindent {\bf BRIEF FUNCTIONAL DESCRIPTION:} \\
\normalsize
This is an ``atomic'' procedure which simply sets the focal plane
temperature to -120 C.

\vspace{0.25in}
\noindent The sequence of actions will be: 
\be
\item disable the focal plane bakeout heater and warm boot the BEP
\vspace{-0.10in}
\item start or re-start a DEA HKP run
\vspace{-0.10in}
\item load the ACIS SW command packet which sets the temperature
\ee


\vspace{0.15in}
\normalsize
\noindent {\bf ASSUMED INSTRUMENT STATE:} \\
\normalsize
Assumes that at least one side of the DPA and DEA A are on and the 
flight SW is running. \\

%\vspace{0.25in}
\normalsize
\noindent {\bf SPECIAL INITIAL CONDITIONS:} \\
\normalsize
Assumes that the contamination environment allows the focal plane to
be cooled to -120 C. \\
%The environment must be clean enough to allow opening of the valve. \\
%Assumes that \axaf\/ ISIM RCTU is powered on and in telemetry format 6. \\

%\newpage 

%\vspace{0.25in}
\normalsize
\noindent {\bf OPERATIONAL CONSTRAINTS/CAUTIONS:} \\
\normalsize
The focal plane must not be cooled below the dewpoint of water if the
CCD are powered on. \\
The focal plane should not be cooled if the spacecraft is still
outgassing significantly and there is a path for the contaminants to
flow to the focal plane. \\


\vspace{0.15in}
\normalsize
\noindent {\bf REFERENCES:} \\
\normalsize

\normalsize
\noindent {\bf CHANGE HISTORY:} \\
\normalsize

{\bf V1.2}
\begin{itemize}
\item changed filenames from ``setFP\_m120'' to ``setfp\_m120''
\end{itemize}

{\bf V1.3}
\begin{itemize}
\item added commands to disable the FP bakeout and reboot the BEP in
step 1
\item added step 2 to start or restart a DEA HKP run
\item added a ``dumpSysConfig'' command in step 3
\item added commandEcho values for SW command packets
\item added filename identification at top of procedure
\end{itemize}

{\bf V2.0}
\begin{itemize}
\item ACIS Team signed-off version
\item changed SW TLM verifiers in step 1.6 to check that the
warmbootFlag =1 and not to check the SW version number
\item changed expected value of BEP Select verifier in step 1.7 to BEP
A or BEP B
\end{itemize}

{\bf V2.1}
\begin{itemize}
\item changed expected value of ``1STAT7ST'' to ``0'' in step 1.7
\end{itemize}


\newcommand{\tablecaptiontext}{SET THE FOCAL PLANE TEMPERATURE TO -120 C}
\input{setfp_m120.tab}

\end{document}
