VWR International VWR 10 Instruction Manual page 9

PIPET Mode
This is the classic pipette mode (forward pipetting), your pipette is simply aspirating and dispensing.
• Fit a suitable tip
• Press the Push-button to aspirate the selected volume.
• To dispense: Click (press and release) the Push-button. Three things happen: sample dispense,
automatic purge and piston reset to zero.
Or Keep your thumb pressing the Push-button until the end of the dispense cycle: the piston reset
takes place after releasing the Push-button again. This feature enables you to remove the tip from
the liquid, without aspirating anything.
• Eject tip by pressing the ejection button.
VWR electronic pipette is ready again for next pipetting cycle while maintaining the volume and the
last settings!
Continue pipetting as you would as if you were using a mechanical pipette.
REPETITIVE Mode
The REPETITIVE Mode allows you to distribute the same volume repeatedly in predefined number
(N) of equal aliquots. You supply the aliquot volume (AV) and the pipette automatically calculates
the number of aliquots possible from the nominal (maximum) volume (NV) of the pipette as follows:
N = NV/AV (e.g. 120 μL x 10 for VWR 1200).
You also can decrease the number of repetitions (e.g. 120 μL x 10-(n ≥1) for VWR 1200).
• Press the Mode-button to access system menu, where you can choose between different pipette
modes by turning left or right the Push-button.
Select REPETITIVE Mode by turning the Push-button.To confirm your selection click on the
Push-button.
• Turn the Push-button half way, the screen will display: "click to change volume"
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