4 Pipetting
34
Operating manual
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3. Fill pipette
a. Immerse pipette tip into the test liq-
uid.
b. Carefully push the pipetting lever up-
wards, and fill the pipette slightly
above the desired mark.
NOTICE
Make sure that no liquid gets into the device! The function of the mem-
brane filter is impaired, and the suction capacity decreases. In this case,
replace membrane filter; see Replace filter and clean adapter, p.37 .
NOTICE
The further the lever is moved upwards, the stronger the suction effect
(i.e., the faster the meniscus rises)!
With large pipettes (> 50 ml), the vacuum in the suction bellows is not
sufficient to draw up the entire amount of liquid at once. In this case:
Press the suction bellows together again and continue to pull it up.
4. Set volume
a. If necessary, wipe the tip of the pipette with a suitable lint-free cloth.
b. Press the pipetting lever down gently until the meniscus is precisely
adjusted.
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