B.4.6 Erlenmeyer flasks, 250 ml and 500 ml capacityB.4.7Peristaltic or syringe pump, capable of delivering 0,01 ml/min.B.4.8 Vacuum pump, capable of maintaining a flow rate of 57 l/minB.5 B.4.6Erlenmeyer flasks, 250 ml and 500 ml capacity.B.4.7 Peristaltic or syringe pump, capable of delivering 0,01 ml/min.B.4.8 Vacuum pump, capable of maintaining a flow rate of 57 l/min.B.5Test specimens .B.6Preparation of bacterial challenge.B.7Procedure.B.8Calculation of bacterial fltration efficiency (BFE)B.9Test reportAnnex C (normative) Method for determination of breathability (differential pressure)C.1Prir.......C.2Test apparatus.C.2.1Mass flow meter(s) capable of measuring an airflow of 8 l/min.C.2.2Manometer, a differential manometer (water or digital). Individual manometers canalso be used. M1 is for the upstream pressure measurement and M2 is for thedownstream pressure measurement.C.2.3Electric vacuum pump including a pressure buffer tank.C.2.4 Valve permitting the adjustment of the flow rate.C.2.5 Sample holder.C.3Test specimens .C.4Procedure.C.5Calculation of differential pressure.C.6Test reportAnnex D (informative] Microbial cleanliness.D.1Sampling.D.2Testing.Annex ZA (informative) Relationship between this European Standard and the essentialrequirements of Directive 93/42/EEC [1993 0JL 169] aimed to be coveredBibliographyB.6Preparation ofbacterial challengB.7ProcedureB.8Calculation of bacterial fltration efficiency (BFE)B.9Test reportAnnex C (normative) Method for determination of breathability (differential pressure].C.1PrincipleC.2Test apparatusC.2.1 Mass flow meter(s) capable of measuring an airflow of 8 l/min C.2.2 Manometer, a differential manometer (water or digital). Individual manometers canalso be used. M1 is for the upstream pressure measurement and M2 is for thedownstream pressure measurement.C.2.3 Electric vacuum pump including a pressure buffer tankC.2.4 Valve permitting the adjustment of the flow rateC.2.5 Sample hoereC.3Test specimensC.4 ProcedureC.5Calculation of differential pressureC.6Test reportAnnex D (informative] Microbial cleanliness.D.1Sampling D.2TestingAnnex ZA (informative] Relationship between this European Standard and the essentialrequirements of Directive 93/42/EEC [1993 0J L 169] aimed to be covered Bibliography