Page 16 / 35
INSTRUCTION MANUAL
SAFE 2010/MaxiSAFE 2010
81-09-IM.doc
Acceptance:
Air velocity in inlet ≥ 0,4 m/s.
S/MS 0,9 S/MS 1,2 S/MS 1,5 S/MS 1,8
0,4 m/s = 258 m
3
/h 344 m
3
/h
430 m
3
/h 516 m
3
/h
Alarms:
The alarm for inflow velocity is set to 0,4 m/sec, and the matching voltage is to be recorded.
The acoustic alarm is tested in accordance with DIN EN 457, measured 0.5 m from the middle of
the cabinet 1.5 m over the floor. The alarm signal must be at least 13 db(A) higher at 4000 Hz than
the sound of the cabinet.
7.3. Airflow patterns, visualisation
The purpose of the test is to verify that no smoke escapes from the working space to the room, and
that smoke will be drawn into the working space from the room.
Equipment: Smoke stick.
Procedure:
Pass the smoke stick in an easy movement along the front opening outside the cabinet. The
smoke must be drawn into the cabinet without visible turbulence.
Test the laminarity of the downflow and along the side- and back wall. No smoke must come out in
the room and only small turbulence must be observed.
7.4. 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 ųg/l to 100 ųg/l and a range covering not less
than 5 log rates.
Test aerosol: POA (Poly-Alpha Olefin).
Emery 3004 from Henkel Company or an equivalent material.
Procedure:
Main- and exhaust filter:
Turn on the cabinet and induce the aerosol through the “challenge” valve to the upstream side of
the filter.
Scan the downstream side of the filter over the entire surface. Scan all filter joints and sealant for
leaks.
Pre-filters (Maxi):
Turn on the cabinet in reduced speed mode, and let the airflow stabilise. Remove the tabletop.
Cover half of the pre filters. Adjust the concentration over the “challenge” piece to 0. Every single
pre-filter is “challenged” with test aerosol, and all joints and surfaces are tested.
To Next Page
Loading...
Need help?
General