Pipet-Plus - Mettler Toledo
Pipet-Plus - Mettler Toledo
Pipet-Plus - Mettler Toledo
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Tip Ejector Arm RemovalThe tip ejector can be removed if necessary.Two types of tip ejector are used and both types can beremoved with minimum effort - do not use force. See Figure 4.For models up to 2000 µL, press in the quick-release tabs onthe ejector arm and pull the ejector down.For 5000 µL and 10 mL pipettes, grasp the top of the ejectorarm and pull outward then downward.To replace the ejector arm on all models, insert the shaftthrough the large opening, align the top with the tip ejectorpushrod, and push until the ejector arm snaps in place.Up to 2000 µLPush inEjector ArmQuick-Release5000 µL and 10 mLTip EjectorPushrodPull EjectorArm outPull Ejector ArmdownPull EjectorArm downFigure 4Removing the Tip Ejector<strong>Pipet</strong>ting Guidelines<strong>Pipet</strong>-<strong>Plus</strong> pipettes have several features for enhanced pipettingconsistency. You should also maintain:1. Consistent pickup and dispense rhythm.2. Consistent speed and smoothness when pipetting.3. Consistent immersion depth. See table on page 9.4. <strong>Pipet</strong>te vertically, or no more than 20° from vertical.5. Do not invert or lay <strong>Pipet</strong>-<strong>Plus</strong> down with liquid in the tip.Pre-Rinsing RecommendedSome solutions (e.g. serum, protein-containing solutions, andorganic solvents) can leave a film on the inside tip wall, resultingin an error larger than the tolerance specified. Since this filmremains relatively constant in successive pipettings with the sametip, excellent precision may be obtained by refilling the tip andusing the refilled volume as the sample. Successive samples fromthis same tip will exhibit good reproducibility (low variance).6