【正文】 .................................................................................... 7 Objectives ....................................................................................................................................................... 7 Average face velocity method ...................................................................................................................... 7 Calibrated pressure difference method....................................................................................................... 8 Pressure drop test ......................................................................................................................................... 8 Objectives ....................................................................................................................................................... 8 Test equipment and test procedure............................................................................................................. 8 Expression of results .................................................................................................................................... 8 Air flow visualization ..................................................................................................................................... 8 Objectives ....................................................................................................................................................... 8 Test procedure ............................................................................................................................................... 9 Expression of results .................................................................................................................................... 9 Room air velocity test ................................................................................................................................... 9 Objectives ....................................................................................................................................................... 9 Test equipment .............................................................................................................................................. 9 Probe positions .............................................................................................................................................. 9 Test procedure and test results ................................................................................................................... 9 Alarm system test .......................................................................................................................................... 9 Alarm by overriding the vertical sash stop ................................................................................................. 9 Air flow indicator............................................................................................................................................ 9 Containment test.......................................................................................................................................... 10 Objectives ..................................................................................................................................................... 10 Test equipment, test procedure and data analysis .................................................................................. 10 Test report .................................................................................................................................................... 10 Sound pressure measurement ................................................................................................................... 10 Objectives ..................................................................................................................................................... 10 Test procedure ............................................................................................................................................. 10 Test report .................................................................................................................................................... 10 6 Routine testing of type tested fume cupboards ....................................................................................... 10 Scope and purpose...................................................................................................................................... 10 Face velocity test ......................................................................................................................................... 11 Objectives ..................................................................................................................................................... 11 Test equipment and test procedure........................................................................................................... 11 Test report .................................................................................................................................................... 11 Extract volume flow rate test ...................................................................................................................... 11 Objectives ..................................................................................................................................................... 11 Sequential average face velocity test ........................................................................................................ 11 EN 141754:2022 3 Licensed copy:PONTYPRIDD COLLEGE, 06/03/2022, Uncontrolled Copy, 169。I S C HES KOM I TEE F 220。ge Teil 4: VorOrt Pr252。ENNE EUROP196。 標(biāo) 標(biāo) 準(zhǔn)