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3 OPERATION
Place a tip on the shaft of the pipette. See Section 6 for the appropriate tip. Press the tip on firmly
using a slight twisting motion to ensure a positive, airtight seal.
Important: Never aspirate liquids into the pipette without a tip attached.
Aspiration
Press the pushbutton to the first positive stop. Fig. 2A. Holding the pipette vertically, immerse the
tip into the sample liquid. The depth to which the tip is immersed depends on the model.
PW2, PW1010
PE20, PW100
PW200, PW1000
PW5000
1 mm
2-3 mm
2-4 mm
3-6 mm
Release the pushbutton slowly and smoothly to aspirate the sample. Fig. 2B. Wait one second
and then withdraw the tip from the liquid. Wipe any droplets away from the outside of the tip using
a medical wipe.
Avoid touching the orifice of the tip.
Dispensing
Place the end of the tip against the inside wall of the vessel at an angle of 10 to 40 degrees. Press
the pushbutton smoothly to the first stop, Fig. 2C. Wait one second. Press the pushbutton to the
second stop to expel any remaining liquid. Fig. 2D. Keeping the pushbutton pressed to the end,
remove the pipette by drawing the tip along the inside surface of the vessel. Release the
pushbutton. Fig. 2E.
Eject the tip by pressing the tip ejector button. Fig. 2F. It is necessary to change the tip if a
different liquid is being sampled or if the volumeter setting is changed.
