System Control: System States
C O N F I D E N T I A L – FEI Limited Rights Data 2-5
Power Off
The system has protection against power failures in the sense that the different components of the system are not
likely to be damaged. However, a power failure is never good for the system. It might affect the ultrahigh vacuum
levels of the columns and the overall stability of the system.
Take sufficient measures to avoid power failures. If it occurs while the instrument is completely operational, the
microscope comes down to a safe state and the following happens:
• Both electron and ion accelerating voltages are switched off.
• Both electron and ion emissions are switched off.
• The specimen chamber vents gently, automatically.
The vacuum in the instrument is no longer supported by running pumps, the column isolating valves close to
save the vacuum in the sources areas.
• The Microscope PC and the Support PC are switched off, the momentary adjustments of all system parameters
(accelerating voltage, magnification, stage positions etc.) are lost if they were not saved.
Note
If the mains failures occur occasionally it is recommended to use the Uninterruptible Power Supply (UPS – option).
Emergency Off
To switch off the electrical power completely in case of emergency, follow this quick and safe procedure:
1. Push the red EMERGENCY OFF (EMO) button (option – see the Safety Manual).
If the button is not installed proceed as follows:
2. Switch off the Main switch S1 breaker, which is placed at the very left side in the row of three,
or disconnect the power cord Main input 230 VAC.
If this is not easily accessible:
3. Turn off the mains wall switch (if present), and / or disconnect the mains plug from the mains socket.
WARNING!
The microscope console water chiller (option – separate device in the microscope vicinity) is powered separately via the
individual power cord. The hazardous voltages may be present on this equipment even when the microscope power plug
is disconnected!
Because the electron column IGP’s are supported by internal batteries, some parts of the microscope are still under
power.
System States
There are several system states:
• Complete shutdown – service and emergency reasons
• Standby – not using the system for a longer period
This is an abnormal system state.
• Overnight – not using the system overnight
• Full operation – all microscope equipment and accessories are in use or ready to use
The system is intended for continuous operation.
The Complete shutdown system state can be set only by a supervisor.
See detailed description of all following processes and elements further in this manual.
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