Belte r r a Cor p or at ion S afety M an ual D oc I D C H S M BE L 2 0 1 7 Pa g e 2 45 of 53 8 This t e st i s c a ll e d a ne ga ti ve pre ssur e us e r se a l che c k b e c a us e y ou c r e a te a sli g htl y n e g a ti ve a ir pr e ssure insi de the re spira tor fa c e piec e b y inhalin g F oll ow these inst ruc ti ons 1 P ut on t he re spira tor a nd other a ssocia ted p e rsona l prote c ti ve e quipm e nt Ti g hten the h e a d st r a ps unt il the r e spira tor fe e ls s nu g but comf orta ble W e a r th e re spira to r f or a fe w min utes so that it will wa rm up a nd c onfor m t o y our fa c e be tt e r 2 C lose of f the inl e t ope nin g of the c a rtr idges or filt e rs b y c ove rin g them g e ntl y with t he pa lm s of y our ha nds a plasti c ba g a spe c ial a d a pter or g loves i n som e c a se s y ou ma y h a ve to re move th e c a rtr id g e s so y ou c a n c ov e r the inl e t valve s I f y ou a re c a r r y ing out t his t e st whi le w e a ring a P APR or a n a ir suppl ied r e spira tor c los e off or disc onne c t t he hos e to st op the a ir f low 3 B re a the in sl ig htl y to cr e a te a va c uum 4 Hold f or 10 se c onds 5 I f y ou ha ve a g o o d se a l t he fa c e pie c e shoul d c oll a pse sli g htl y a ga inst y our fa c e a nd st a y c oll a ps e d No a ir should l e a k int o the fa c e pie c e pa st t he sides to p or bott om For a ne gati v e pre ssure s e al che c k c lose off the in let ope nings w it h y our pal ms and i nhale ge ntl y C onsul t t he manuf a c ture r s ins truc ti ons t o se e whe ther the positi ve pre ssur e use r se a l ch e c k a ppli e s to the r e spira tor 120 F IT T E S T ING Af ter the r e spira tor h a s p a ssed the posi ti ve a nd the ne ga ti ve pr e ssure us e r s e a l che c k a nothe r te st of the se a l ca ll e d a fi t t e st mus t be done a nd the r e sult s re c ord e d W he n fit t e sts a re pe r for med w orke rs must be c lea n sha v e n a nd mus t we a r a ll other prot e c ti ve e quipm e nt t ha t t he y n e e d suc h a s g o gg les a nd h a r d ha ts P re sc riptio n e y e g l a sses must not int e rf e re with the se a l of the r e spira tor spe c ialt y e y e g l a sses a re a va il a ble I de a ll y fit tes ts s hould be done unde r ope ra ti n g c ondit ions s im il a r to those tha t wor ke rs w ould ex pe rie nc e a t t he wor ksit e The re a re two t y pe s o f f it testing qua li tative a n d q ua nti tative I n qu a li tative fit t e sti ng wor ke rs w it h poorl y se a li ng re spira to rs will de tec t an ir rita nt an odo r or a taste whe n e x pose d to a te st a g e nt Doc u m e n t Identif icat ion S E L 033 P age Nu m b e r 12 of 14 Doc u m e n t C r e ation Dat e Ma y 2 2015 Im p le m e n tat ion Dat e J une 30 2015 I n qu a nti tative f it testing spe c ializ e d e quipm e nt i s used to a c tuall y mea sur e the a mount of the test a ge nt lea king int o the f a c e piec e