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ZEISS
2 Safety | 2.5 Safety Devices and Interlocks
2.5.6 Interlock System of Optional Airlock
The interlock function ensures that the gate valve can only be operated if the chamber door and
the airlock door are properly closed.
Fig. 8: Airlock Error LED
Additional blocking functions ensure that the specimen can only be transferred if the following
conditions are fulfilled:
§
The airlock rod is retracted.
§
The specimen stage is in transfer position.
§
The EHT (Extra high tension) is off.
§
The column chamber valve is closed.
This is to prevent any risk of damaging the airlock rod or the gate valve.
2.5.7 Energy Isolating Devices
At the site of installation, the electrical power connection and the fluid connections must be
equipped with energy isolating devices.
As energy isolating devices, the following main shut-off valves are required:
§
Water supply
§
Water runback
§
Nitrogen supply
§
Compressed air supply
The energy isolating devices
§
must be easily accessible
§
must be mounted near the microscope in such a way that the person actuating or inspecting
an energy isolating device is not be exposed to serious risks
§
must close off the connections to the corresponding media when needed
§
must be lockable in their off position in order to prevent accidental re-activation
Instruction Manual ZEISS SIGMA series | en-US | Rev. 7 | 352102-9344-006
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