- 
quit pics_gui and pics_ag, enter on IDL prompt :
 
         Pmas> pics_shutdown,e
- 
exit IDL and shutdown rike from unix prompt, type : 
 
         Pmas> exit
         rike:~/idl > su - goodbye 
- superuser password required !
- 
Switch off PMAS Electronics MAIN SWITCH
 
- 
Disconnect PMAS  230VAC  and LAN cables
 
Note: Do not leave PMAS  unconnected from 230VAC longer 
                 than necessary  ( CCD cryostats unregulated ! )