Edition 3 April 2012 Mars/Mars Pro Service Manual
Page 48/59
10.5 Test of the retention at front opening
General:
This test is optional, but useful for determination of the operator protection after installation where the cabinet is under
influence of the laboratory environment.
Equipment:
KI Discus tester, equipment with an aerosol that challenges the air curtain, established by the down-and inflow.
Procedure:
With a spinning disc the test aerosol (Potassium iodide 1.5% in Ethanol) is spread inside the MSC, in a
homogeneous aerosol cloud. The particles leave the disc in a horizontal course, and try to pass the air
curtain.
Four Air Samplers, each with a filter membrane, catch particles, which escape through the air curtain.
With a developing agent (Palladium chloride 0.1%) particles deposited on the filter membrane will
show up as brown spots. The amount of spots is to be counted.
Acceptance:
Apf =1×10
5
– Refer to EN 12469 for details.
Maintenance
Every 5000 operating hours or at least once every year the cabinet has to be inspected and tested.
Before repair work is carried out inside the contaminated and/or infected cabinet and prior to filter replacement and
upon change of location, proper cleaning and disinfecting by the operator is required. The lab Manager/Safety
Manager must confirm this in writing to service personnel. For the appropriate form, refer to section 13
After completion of work, tests are required according to the standard.
Leakage test of main and exhaust air filter.
Test and adjust air velocities and alarm settings in the vertical flow inside the work chamber and the horizontal in-
flow in the work opening.
Test of air flow patterns.
General function and safety tests in accordance with local requirements.
For this purpose we recommend a maintenance agreement.
To Next Page
Loading...
Need help?
General
