Labconco 700821500, Руководство пользователя

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5: Using Your Freeze Dryer
Operation Checklist
The following checklist should be followed prior to each use of your extraction freeze
dryer.
1. Wipe out the interior of the tray dryer chamber with a soft cloth or paper towel to
remove any moisture or debris.
2. Remove the shelves in the tray dryer
to access the freeze dryer’s collector
chamber. Wipe the interior of the collector chamber with a soft cloth or paper
towel to remove any accumulated moisture.
3. Use a soft, lint-free cloth or paper towel to wipe the seal of the tray dryer door to
remove any dirt or contaminants that could cause a vacuum leak.
4. Ensure the collector chamber and drain line are free of water. Place the drain
hose in a suitable container to collect the condensate from the collector chamber.
Insert the quick connect drain fitting into the quick connect drain coupling located
on the left-hand side of the freeze dryer.
Note: The freeze dryer (collector or
vacuum) will not start if moisture is detected in the drain line.
5. After completely draining the system, disconnect the quick connect drain fitting
from the quick connect drain coupling.
Disconnect the quick connect drain fitting before starting the vacuum
pump. Failure to remove the fitting will result in a large vacuum leak.
6. Start COLLECTOR and allow the refrigeration system to reach its specified
operating temperature.
7. Start VACUUM when collector temperature is -
40⁰C or colder.
8. Fully vent the tray dryer to atmospheric pressure, open the door and load a pre-
frozen sample onto the shelf.
Vacuum Pump Ballast Setting
Most vacuum pumps are equipped with a gas ballast mechanism. The freeze dry
process requires high vacuum. Therefore, it is recommended that the gas ballast be
closed during operation of the extraction freeze dryer. If the gas ballast is left open for
extended periods of operation, the oil can be pumped out the exhaust, causing the
pump to fail.
Pre-Freezing Samples
The sample container size should always be at least two to three times the sample size.
The temperature required for pre-freezing is dependent on the characteristics of the