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version 1.1, 2003/04/04 16:01:38
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version 1.2, 2003/04/11 23:13:06
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| \category{hms} % Subject area of this document | \category{hms} % Subject area of this document |
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| %\maintainer{Name of person maintaining document} % Optional | %\maintainer{Name of person maintaining document} % Optional |
| \date{April 1, 2003} % Can use \today as the argument |
\date{April 11, 2003} % Can use \today as the argument |
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| \begin{document} | \begin{document} |
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| An interlock prevents access to the HMS detector hut unless the | An interlock prevents access to the HMS detector hut unless the |
| safety shutter has been moved to its `down' position, | safety shutter has been moved to its `down' position, |
| such that it covers the vacuum window. This is to prevent people from | such that it covers the vacuum window. This is to prevent people from |
| accidentally touching the large vacuum window. The shutter cannot |
accidentally touching the large vacuum window, or suffering hearing |
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loss should there be a catastrophic failure of the window. The shutter cannot |
| be retracted unless the door is closed. The door cannot be opened | be retracted unless the door is closed. The door cannot be opened |
| unless the shutter is already inserted. | unless the shutter is already inserted. |
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| \section{Shutter Operation} | \section{Shutter Operation} |
| To close the shutter, press (and hold for a few seconds) the button labeled | To close the shutter, press (and hold for a few seconds) the button labeled |
| ``CLOSE'' on the shutter control box. This will start insertion of the |
``DOWN'' on the shutter control box. This will start insertion of the |
| shutter. After a few seconds the light indicating ``out'' will turn off. |
shutter. After a few seconds the light indicating ``OUT'' will turn off. |
| It takes about two minutes for the shutter to move into place. When it | It takes about two minutes for the shutter to move into place. When it |
| does, the light labeled ``IN'' will glow. The shutter is now inserted and |
does, the light labeled ``IN'' will glow. This indicates that the shutter is inserted and |
| the door may be opened. | the door may be opened. |
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| To open the shutter, after the HMS shield house door has been fully |
To open (i.e. {\it raise} the shutter, after the HMS shield house door has been fully |
| closed, press the button labeled ``CLOSE'' and hold it for a few |
closed, press the button labeled ``UP'' and hold it for a few |
| seconds. The ``IN'' light will dim as the shutter moves away from | seconds. The ``IN'' light will dim as the shutter moves away from |
| the fully inserted position. Full retraction takes about two minutes. | the fully inserted position. Full retraction takes about two minutes. |
| When the shutter is fully retracted, | When the shutter is fully retracted, |
| the 'OUT'' light will glow. |
the ``OUT'' light will glow. |
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| Usually the shutter is retracted by MCC operators after they have | Usually the shutter is retracted by MCC operators after they have |
| swept the interior of the HMS shield house and closed the door. | swept the interior of the HMS shield house and closed the door. |
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| hall without opening the shutter, you will have to make a | hall without opening the shutter, you will have to make a |
| controlled access and open the shutter yourself. | controlled access and open the shutter yourself. |
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If you enter the HMS shield house during Controlled Access, |
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you are responsible for closing the door and raising the shutter yourself. |
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| ``IN'' and ``OUT'' shutter status lights are located both on the | ``IN'' and ``OUT'' shutter status lights are located both on the |
| shutter control box and on the top left panel of the Counting House | shutter control box and on the top left panel of the Counting House |
| main console. You can check the status of the shutter from the | main console. You can check the status of the shutter from the |
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| % Revision history: | % Revision history: |
| % $Log$ | % $Log$ |
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% Revision 1.2 2003/04/11 23:13:06 saw |
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% (hcf) Some corrections |
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% |
| % Revision 1.1 2003/04/04 16:01:38 saw | % Revision 1.1 2003/04/04 16:01:38 saw |
| % Initial Checkin | % Initial Checkin |
| % | % |
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