DO NOT ATTEMPT THIS unless you REALLY REALLY know how to check the
tagger vacuum and the setting of ALL the vacuum valves in the
tagger system. You can wreck the MAMI vacuum!

The beamline-valve that you have to open has the description {\sf
SFA2PLVE09}.
It is located around three metres in front of the radiator-box along the
beamline. It is running on compressed air. If you like to open this valve
you have to plug-in the 220V-connector of the magnetic-valve that controls
the compressed air. This cable has a dark-green tape label on it. Plug it
into one of the sockets available in the vicinity. With a loud
{\em BANG} the valve should open. Open only if you are sure and
the tagger vacuum is ok! If you want to close the valve after a
beamtime, just disconnect the plug from the socket.