ZEISS
7 Operation | 7.1 Filling the Dewar with Liquid Nitrogen
Always exchange the specimen via the airlock, when the cryo trap is cooled down.
Info
Ensure, that the borehole in the lid does not face the specimen chamber.
7.1 Filling the Dewar with Liquid Nitrogen
Prerequisite
ü
The chamber must be evacuated.
1. Open the lid.
2. Fill in liquid nitrogen as necessary with a suitable container (dewar) and funnel.
3. Wait 10 to 15 minutes.
4. Refill.
5. Close the lid (white Teflon cover).
6. Make sure that the lid is correctly seated and
the borehole is not facing towards the speci-
men chamber.
7. For extended operating hours (>10 hours), refill liquid nitrogen as necessary.
7.2 Venting the Specimen Chamber
1. Start the CryoWarmUp macro with the button
CryoWarmUp
in the SmartSEM Toolbar.
à
This will stop the turbo pump, execute a partial vent and keep the system chamber at a
pressure of about 30 mbar, followed by a regular system pump-down.
à
The cooling plate will be warmed up to 20°C within 6 hours.
9
After that you can open the specimen chamber.
Instruction Manual ZEISS Cryo Trap | en-US | Rev. 2 | 346000-8166-000
15
Summary of Contents for Cryo Trap
Page 1: ...Instruction Manual ZEISS Cryo Trap...
Page 19: ......
