FEI Quanta FEG 250, Руководство пользователя

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System Options: CryoCleanerEC
9-53
WA R N I N G !
When the LN2 is removed from the nitrogen vessel, the bottle still
remains at a very low temperature.
5. Place the Nitrogen vessel onto the Stand ready for baking.
Baking Nitrogen Vessel
1. Place the Nitrogen vessel Stand on a suitable heat resistant
surface.
2. Place the Nitrogen vessel onto it and use an Infra-red lamp to bake
the base of the bottle. Baking should take place for approximately
2 hours.
Alternatively the Nitrogen vessel can be baked in an oven at 90 °C
for 2 hours.
Regenerating the Dewar by heat allows removal of condensed
contamination and subsequent reuse of the vessel.
Note:
The oven that is used must have a venting system to extract any
harmfull fumes. Alternatively it should be baked in a fume cupboard
using an infra-red lamp.
Replacing Nitrogen Vessel
1. Vent the specimen chamber. Allow the Nitrogen vessel to cool
down before handling.
2. Unlock two clips holding the Vacuum vessel Lid. Remove the Lid
from the Vacuum vessel.
3. The Nitrogen vessel can be placed in the Vacuum vessel, taking
care that the 'O' ring seal on the Vacuum vessel is secure when
joining the two components together. Secure the two components
by fixing the clips to the top of the Nitrogen vessel and locking the
clips down.
4. Pump the specimen chamber. The Vacuum vessel is pumped
along with the specimen chamber.
MAINTENANCE
• Keep the 'O' rings clean of dust and fibre particles by inspecting
the Vacuum vessel main 'O' ring on a regular basis. If the Vacuum
vessel is removed frequently from the specimen chamber, inspect
the specimen chamber 'O' ring seal each time.
• Keep the sealing surfaces of the Nitrogen vessel and the Vacuum
vessel Lid clean and free of dust and fibre particles.
• Do not use any kind of vacuum grease on the 'O' rings.
• Wipe outsides of the stainless steel parts to remove finger stains
with a lint free cloth dampened with pH neutral soap solution.
SPARE VESSEL
It is possible to obtain secondary nitrogen vessel kit, which contains:
• Nitrogen Vessel
• Vessel Stand
• Vessel Plug