Mars-Mars PRO
User Manual
Code No. 9.900.900.710
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8.4 Test of filters
Equipment:
Aerosol generator capable of producing test aerosol for HEPA filter leak testing.
Aerosol photometer with an upper measuring threshold of 10 µg/l to 100 µg/l and a range covering
not less than 5 log rates.
Test aerosol:
PAO-4 from ATI, or
Emmery 3004 from Henkel Company, or an equivalent material.
Procedure:
Mars:
Main- and exhaust filter:
Turn on the Mars and introduce the aerosol directly under the table top at the centre of the cabinet.
Adjust the Photometer to 100% up-stream concentration
Scan the downstream side of the filter over the entire surface. Scan all filter joints and sealant for
leaks.
Mars PRO:
Main and exhaust filters:
Turn on the Mars PRO and introduce the aerosol directly in the centre of the cabinet backwall.
Adjust the Photometer to 100% up-stream concentration
Scan the downstream side of the filter over the entire surface. Scan all filter joints and sealant for
leaks.
Pre-filter
Turn on the Mars PRO and introduce the aerosol slowly directly in each filter over the whole surface -
one by one.
Adjust the Photometer to 100% up-stream concentration.
Scan the clean side of the filter over the entire surface. Scan all filter joints and sealant for leaks.
Acceptance:
Maximum local penetration: 0.01% of upstream concentration.
8.5 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.
