6 liquids with specific properties, 1 adjusting the volume selection dial, 5 gravimetric check – Eppendorf Maxipettor 4720 User Manual
Page 13: Gravimetric check
Gravimetric check
Varipette
®
4720
English (EN)
13
4.6
Liquids with specific properties
You can use the Varitip S to dispense liquids that differ substantially from water with
regard to their densities or vapor pressures.
Use the Maxitip to determine the required settings.
4.6.1
Adjusting the volume selection dial
5
Gravimetric check
The liquid for pipetting, Aqua bidest, must have the same temperature as the ambient air
20 °C – 27 °C (= reference temperature). In order to calculate the volume from the weight
Abb. 8:Correcting the volume
Fig. 8:
Correcting the volume
1. Attach the Maxitip.
2. Set the required volume using the selection
dial.
3. Keep the pipetting lever pressed down while
aspirating the liquid.
4. Turn the selection dial until the meniscus of the
liquid has reached the corresponding scale
mark. Turn the dial clockwise to raise the liquid
level. Turn the dial counter-clockwise to lower
the liquid level.
5. Read the setting determined for the required
volume from the volume display.
6. Dispense the volume from the Maxitip.
• For liquids with high vapor pressure, repeat aspirating and dispensing the liquid
until you can see no more gas bubbles at the tip when dispensing the liquid.
• We recommend the Varitip P for viscose liquids.