VWR VWRA613-6688, Manual

Page: 9 / 24

- 6 -
4.6 MATERIALS
NOTICE! Aggressive substances may damage
components, consumables and accessories.
• Check the chemical resistance before using organic
solvents or aggressive chemicals.
• Only use liquids whose vapors do not attack the
materials used.
5 PIPETTE OPERATION
5.1 PIPETTING GUIDELINES
4.5 VOLUME INDICATOR DISPLAY EXAMPLE
• Check the tip cone to make sure it is clean.
• While using the pipette make sure that operating
plunger is handled slowly and smoothly.
• Ensure that the tip is firmly attached on the tip cone.
Please check for foreign particles and remove if any,
around the tip cone.
• Make sure that the temperature of tip, pipette and liquid
are at equilibrium.
• While aspirating, hold the pipette in upright position and
keep the tips at a constant depth below the surface of
the liquid.
• Pre-rinse the pipette tip before aspirating the sample by
filling and emptying the pipette tip five (5) times. This is
important when dispensing samples that have a
viscosity and density different from water and for volatile
solvents.
• Do not pre-rinse the tip when pipetting samples with
temperatures different from the current ambient
temperature. Be sure to change the pipette tip after
each pipetting.
• For the volatile solvents you should saturate the air
cushion of your pipette by aspirating and dispensing the
solvent repeatedly before aspirating the sample.
• When pipetting liquids with temperature different to the
ambient temperature, pre-rinse tips tip several times
before use.
VWRA613-6688 VWRA613-6690 VWRA613-6689 VWRA613-6692
VWRA613-6716 VWRA613-6696 VWRA613-6694 VWRA613-6695
2.25 μl 18.3 μl 10 μl 100 μl
300 μl 9.30 ml 1 ml 4.85 ml