Heraeus HS 9 Service Manual page 176

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3 page Testing Safety Cabinet Class II
Low-turbulence repression flow
Mean repression flow speed for product protection 0.25 m/s – 0.5 m/s
Measuring level 50 mm - 100 mm above working opening
1/8
1/4
1/2
1/4
11,25 cm
15,00 cm
18,75 cm
22,50 cm
1 m/s 2
5 m/s 6
No individual measuring must deviate more than 20% from mean value!
Measuring instruments and their application
Measuring instrument
VDE-testing instrument
Anemometer
Particle monitor 28.3 l/min
Dilution system 1:1000
Aerosol generator
Test aerosol DEHS
Flow test tube
TEST RESULTS ACCORDING TO EN 12 469
Retaining at working opening
Integrity of exhaust air filter
Product protection (class II only)
Cross contamination (class II only)
KI – Disk method (voluntary)
Instrument complies with state of the art as per DIN EN 12 469 with regards to personal
protection
Date Signature Customer
2/8
2/8
1 2
5 6
Dimension 90 cm
Dimension 120
cm
Dimension 150
Dimension 180
Testing grid measuring points
m/s 3 m/s
m/s 7 m/s
Measuring Calibration note
instrument no.: no.:
./. ./.
./. ./.
./. Use before:
according to EN 12 469
1/8
2/8
3 4
7 8
4 m/s
8 m/s
Requirement fulfilled
Calibration date
./.
./.
Requirement fulfilled
Requirement fulfilled
Requirement fulfilled
Requirement fulfilled
Requirement fulfilled
Date Signature Service Engineer
Mean air speed
m/s
Yes No
Application
VDE-Safety test
Air speed metering
Air filter free of leakage
Particle measuring filter
Particle measuring filter
Particle measuring filter
Fire gas test
Yes No
Yes No
Yes No
Yes No
Yes No
Yes No