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\large
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\centerline {\bf 5.13\_V1.0 EXIT BAKEOUT: FP to $-60$~C, DH to $+20$~C }
\vspace{0.25in}

\normalsize
\noindent{\it Last Revised: October 6, 2003}\\
\noindent{\bf Filename: exit\_bake\_FPm60\_DHp20} \\

\noindent {\bf BRIEF FUNCTIONAL DESCRIPTION:} \\
\normalsize

This procedure takes the instrument out of the bakeout mode which
set the detector housing (DH) temperature to $\sim +20.0$~C and the 
focal plane (FP) to $\sim-60.0$~C and
restores it to the canonical thermal standby state. 
The procedure first turns off the DH heaters and waits for the
DH to cool to $\sim -55.0$~C.  It will take the DH about 12~hr to
reach $-55.0$~C.  Once the DH is cold, then the FP bakeout heater
is turned off and the FP is allowed to cool to -120 C. This procedure
takes a long time to execute, but the vast majority of that time is
spent waiting for the DH and/or FP to cool.  Please note that the FP
is commanded to a set point of -121.0 C, since the set point
apparently shifted after launch.


\vspace{0.25in}
\noindent The sequence of actions will be: 
\be
\item Verify the initial Camera Body, Warm \& Cold Radiators and FP temperatures
\vspace{-0.10in}
\item Turn off the DH bakeout heater and begin cooling the DH to -60~C
\vspace{-0.10in}
\item Disable the FP bakeout  and cool the FP to -120~C
\vspace{-0.10in}
\item Monitor the FP temperature as it cools to -120~C
\vspace{-0.10in}
\item Translate the SIM to the HRC-S position
\ee


%\vspace{0.25in}
\normalsize
\noindent {\bf ASSUMED INSTRUMENT STATE:} \\
\normalsize
Assumes the instrument is in the bakeout mode with the FP and DH
bakeout heaters on and the FP temperature at -60~C and the DH
temperature at +22.8/17.8~C.\\
Assumes the video boards and FEPs are off.\\


\vspace{0.25in}
\normalsize
\noindent {\bf SPECIAL INITIAL CONDITIONS:} \\
\normalsize


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\vspace{0.25in}
\normalsize
\noindent {\bf OPERATIONAL CONSTRAINTS/CAUTIONS:} \\
\normalsize


\vspace{0.15in}
\normalsize
\noindent {\bf REFERENCES:} \\
\normalsize
\noindent ACIS Long Form Functional Test Procedure (36-01301.01) \\
\noindent SOT procedure 2.13\_V2.0 ``Exit Full Bakeout and Return to
Thermal Standby Mode''

\vspace{0.15in}
\normalsize
\noindent {\bf CHANGE HISTORY:} \\
\normalsize

{\bf V1.0}
\begin{itemize}
\item adapted from SOT procedure 2.13\_V2.0 ``Exit Full Bakeout and Return to
Thermal Standby Mode'', corresponding FOT procedure is SAP\_61076

\end{itemize}

\newcommand{\tablecaptiontext}{Exit Bakeout: FP to $-60$~C, DH to
 $+20$~C and Return to Thermal Standby Mode }
\input{exit_bake_FPm60_DHp20.tab}

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