Checking Aerosol Tightness; Quick Test - VWR avantor Micro Star 21 Instruction Manual

Checking Aerosol Tightness

The aerosol tightness testing of the rotors and buckets depend on the microbiological test
process in accordance with the EN 61010-2-020 Appendix AA.
Whether or not a rotor is aerosol-tight depends primarily on proper handling.
Check as needed to make sure your rotor is aerosol-tight.
The careful inspection of the seals and seal surfaces for signs of wear and damage such
as cracks, scratches and embrittlement are extremely important.
Aerosol-tight applications are not possible if the lids are open.
Aerosol tightness requires the correct operation when filling the sample vessels and closing
the rotor lid.

Quick Test

As a quick test, it is possible to test the aerosol tightness of fixed-angle rotors using the
following process:
1. Lubricate all seals lightly.
Always use the supplied grease when lubricating the seals.
2. Fill the cavities with approx. 10 ml of carbonated mineral water.
3. Close the rotor as explained in the handling instructions.
4. Shake the rotor vigorously using your hands.
This releases the carbonic acid gas, which is bound in the water, resulting in excess
pressure.
Do not apply pressure to the lid when doing so.
Leaks can be detected by escaping water or the sound of escaping gas.
Replace the seals if you detect any leaks. Then repeat the test.
5. Dry the rotor, rotor lid and the cover seal.
CAUT IO N
Operation
The quick test is not suited for validating the aerosol tightness of a rotor.
Check the seals and sealing surfaces of the lid thoroughly.
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