Eppendorf Varispenser 4962 - Manual (Page 34)

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Attention: Do not carry the mounted
instrument by the upper casing. Always
support both the varispenser and the
bottle. Carry the mounted instrument
only as shown in the figure.
8. Removing Air
8.1. Dispenser without recirculation valve
Hold a suitable vessel below the discharge tube outlet.
Warning: Reagent may splash.
The discharge tube must always point
away from the user and others all the
time.
– Gently pull up the piston and push
down quickly. Repeat this motion in
the lower filling area of the cylinder
until air bubbles have disappeared
from the cylinder.