Buchi Nano B-90, Руководство по эксплуатации

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6 Operation
73
B-90 Operation Manual, Version B
The electrostatic particle collector has very high separation efficiency. Nevertheless some particles
may be deposited on the glass cylinder wall and the inner star electrode. These particles can be
recovered carefully with a spatula or a brush.
Recommended set of tools for particle recovery
• BUCHI particle scraper (order no. 11055338)
• BUCHI weighing paper in A4 format (order no. 11055339)
Particle recovery procedure
1. Place a blank sheet of weighing paper on a free area inside a fume hood.
2. Remove the collector cylinder from the bottom basement of the particle collector.
3. Place the collector cylinder on the sheet of paper.
4. Use a particle scraper to collect particles from the cylinder.
5. Lift the cylinder from the weighing paper and put it aside.
6. Fill the powder from the sheet of paper into a storage vessel. Depending on the substance, a
particle recovery rate of up to 90 % can be achieved.
NOTE
Act carefully (e.g. avoid shaking movements) in order to prevent loss of particles. Clean all contami-
nated parts thoroughly to avoid hazardous situations and cross contamination. For information about
cleaning, see section 7.6.
6.9 Other operation modes
6.9.1 Inert Loop B-295 operation
System preconditions
All system items must be correctly installed according to the set-up configuration. See section 5 for
more information. Carry out a final installation check (see section 5.9) before starting a spray drying
process.
! Danger
Death by suffocation or serious poisoning by inhalation of inert gases.
• Do not inhale inert gases
• Directly withdraw released gases and gaseous substances by sufficient ventilation
• Only operate the instrument in ventilated environments
• Before operation, check all parts, connections and sealings involved in the gasflow for proper
sealing
• Exchange worn out or defective parts immediately