2
nd
page Testing Safety Cabinet Class II according to EN 12 469
Air filters free of leakages according to DIN EN 12 469 Appendix D
Test connection for DEHS- Test available
Yes
no
Pre-filter set ( Option) HEPA-Filter
Remarks
Values
Circulation air filter
Remarks
Values
Filter class ( H 12 /99.9 % ) Filter class ( H 14 / 99.999 % / 0.3 µm )
Particle concentration in plenum without test
aerosol
Measured raw air concentration 0.3 µm
Raw air concentration 0.3 µm before pre-filters Max. permissible mean flowthrough ( 1/100.000)
Max. permissible mean flowthrough ( 1/1.000 ) Measured mean flowthrough
Particle concentration in plenum with test
aerosol
Max. permissible local flowthrough
Number of filter elements/ Mean filter
concentration
Measured local flowthrough
Filter class requirements fulfilled (1
Yes
no Filter class requirements fulfilled
Yes
no
(1) For individual filter tests see separate printout of particle monitoring
Exhaust air filter
Remarks
Values
Second exhaust air filter ( Option)
Remarks
Values
Filter class ( H 14 / 99,999 % / 0,3 µm ) Filter class
Measured raw air concentration 0.3 µm Measured raw air concentration 0.3 µm
Max. permissible mean flowthrough ( 1/100.000) Max. permissible mean flowthrough ( 1/100.000)
Measured mean flowthrough Measured mean flowthrough
Max. permissible local flowthrough (2) Max. permissible local flowthrough
Measured local flowthrough (2) Measured local flowthrough
Filter class requirements fulfilled
Yes No
Filter class requirements fulfilled
Yes
no
(2) Only for safety cabinets that are not connected to customer’s exhaust air system
Remarks:
Air inflow speed Method 1 Air speed at exhaust air filter
Mean air inflow speed for personal protection of user
Front panel in working position
1 m/s 2 m/s 3 m/s 4 m/s 5 m/s
Air inflow speed Method 2 Air speed in exhaust air filter
Mean air inflow speed for personal protection of user
Front panel opening height 50 mm
1 m/s 2 m/s 3 m/s 4 m/s 5 m/s 6 m/s
7 m/s 8 m/s 9 m/s 10 m/s 11 m/s 12 m/s
13 m/s 14 m/s 15 m/s 16 m/s 17 m/s 18 m/s
Mean air speed in relation to height of working opening
Target value > 0.4
m/s
m/s
Air flow on all positions of working opening into safety cabinet Some test OK
Yes No
No individual measuring must deviate more than 20% from mean value!
Requirement
fulfilled
Yes
No
Remarks:
Date :2001- 10-01
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