Heraeus HS 9 Service Manual page 175

nd
2 page Testing Safety Cabinet Class II
Air filters free of leakages according to DIN EN 12 469 Appendix D
Test connection for DEHS- Test available
Pre-filter set ( Option)
Filter class
Particle concentration in plenum without test
aerosol
Raw air concentration 0.3 µm before pre-filters
Max. permissible mean flowthrough ( 1/1.000 )
Particle concentration in plenum with test
aerosol
Number of filter elements/ Mean filter
concentration
Filter class requirements fulfilled (1
(1) For individual filter tests see separate printout of particle monitoring
Exhaust air filter
Filter class ( H 14 / 99,999 % / 0,3 µm )
Measured raw air concentration 0.3 µm
Max. permissible mean flowthrough ( 1/100.000)
Measured mean flowthrough
Max. permissible local flowthrough (2)
Measured local flowthrough (2)
Filter class requirements fulfilled
(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
1 m/s 2
Air inflow speed Method 2 Air speed in exhaust air filter
1 m/s 2
7 m/s 8
13 m/s 14
Mean air speed in relation to height of working opening
Air flow on all positions of working opening into safety cabinet
No individual measuring must deviate more than 20% from mean value!
Remarks:
Remarks
HEPA-Filter
Values
( H 12 /99.9 % )
Yes
no
Remarks
Values
Yes No
Mean air inflow speed for personal protection of user
Front panel in working position
m/s 3
Mean air inflow speed for personal protection of user
Front panel opening height 50 mm
m/s 3
m/s 9
m/s 15
according to EN 12 469
Circulation air filter
Filter class ( H 14 / 99.999 % / 0.3 µm )
Measured raw air concentration 0.3 µm
Max. permissible mean flowthrough ( 1/100.000)
Measured mean flowthrough
Max. permissible local flowthrough
Measured local flowthrough
Filter class requirements fulfilled
Second exhaust air filter ( Option)
Filter class
Measured raw air concentration 0.3 µm
Max. permissible mean flowthrough ( 1/100.000)
Measured mean flowthrough
Max. permissible local flowthrough
Measured local flowthrough
Filter class requirements fulfilled
m/s 4 m/s
m/s 4 m/s
m/s 10 m/s
m/s 16 m/s
Target value > 0.4
m/s
Some test OK
Requirement
fulfilled
Yes
Remarks
Values
Yes
Remarks
Values
Yes
5 m/s
5 m/s 6
11 m/s 12
17 m/s 18
Yes
Yes
no
no
no
m/s
m/s
m/s
m/s
No
No