Eppendorf XplorerPlus Adjustment - Manual (Page 15)

Change adjustment
Eppendorf Xplorer ® /Xplorer ® plus
English (EN)
15
2.7.2 2-point adjust.
After you enter the density, two different volumes and the corresponding mean value of the two weighing
results, the Xplorer pipette determines a correction factor. The factor is only correct for the selected volume
range and the selected work technique. However, the factor is used for the entire volume range of the
Xplorer pipette, i.e., below and above the two measuring points as well. You must carry out a gravimetric
test to check the validity of the factor. When entering the two volumes and the two mean values of the
weighing results, follow the instructions as for the example of 1-point adjustment (see p. 12). Strictly
speaking, the correction only applies to the range between 25% to 50% of the nominal volume (see
Fig. 2-5 on p. 15). However, the correction is used for the entire measurement range.
Abb. 2-5: Example 2-point adjustment: Correction data was entered for 25% and 50% of the nominal volume.
Fig. 2-5: Example 2-point adjustment: Correction data was entered for 25% and 50% of the nominal
volume.
Select two significantly different volumes suitable for your task. When using two slightly
different volumes (for example, 50% and 45% of the nominal volume), measured values
outside of the test volumes may be strongly falsified.
min.
Factory setting
Legend:
2-point adjustment at 25% and 50%
max.
Piston stroke
of Xplorer
max.
Volume
display of Xplorer
25 % 50 % 75 %