aeg, mis kulub vedela meniski laskumiseks gradueerimisjoonelt/skaalakriipsult punktini, kus menisk näib joas peatuvat ühe märgiga/skaalakriipsuga pipettide puhul, ja ülemisest gradueerimisjoonest/skaalakriipsust alumisele gradueerimisjoonele/skaalakriipsule kahe märgiga/skaalakriipsuga pipettide puhul
time required for the descent of the liquid meniscus from the graduation line to the point at wich the meniscus appears to come to rest in the jet for one-mark pipettes and from the upper graduation line to the lower graduation line for two-mark pipettes
time required for the pipette to deliver its nominal volume
time required for the descent of the liquid meniscus from the zero line to the lowest graduation line of the volumetric instrument
Manustamisaja testimiseks hoitakse puhast pipetti vertikaalselt ja täidetakse deioniseeritud veega mõne millimeetrini (ülemisest) gradueerimisjoonest/skaalakriipsust kõrgemale; langev menisk asetatakse seejärel sellele joonele/kriipsule. Pipeti joa/otsa külge jäänud tilk eemaldatakse, viies klaasanuma pinna kokkupuutesse joa otsaga.
For testing of the delivery time, the clean pipette shall be held in a vertical position and filled with de-ionized water to a few millimeters above the (upper) graduation line; the falling meniscus shall then be set to this line. Any drop adhering to the jet of the pipette shall be removed by bringing the surface of a glass vessel into contact with the tip of the jet.
