Calibration And Adjustment - Thermo Scientific Finnpipette F2 Instrucciones De Uso

1. Immerse the tip into the reagent and depress the
push button to the first stop, making sure the tip
is well below the surface.
2. Release the push button slowly to the ready
position.
This will fill the tip. Keep the tip in the solution.
3. Depress the push button to the first stop and
release slowly. Keep repeating this procedure
until the interior wall of the tip is clear.
4. Finally, depress the push button all the way to the
second stop to completely empty the tip.

Calibration and adjustment

All Finnpipettes are factory calibrated and adjusted to give the volumes as specified with
distilled or deionized water using the forward pipetting technique. It should be noted that the
use of other pipetting techniques may affect the calibration results. The pipettes are constructed
to permit re-adjustment for other pipetting techniques or liquids of different temperature and
viscosity.
Device requirements and test conditions
An analytical balance must be used. The scale graduation value of the balance should be chosen
according to the selected test volume of the pipette:
Volume range
under 10 µl
10-100 µl
above 100 µl
Test liquid: Water, distilled or deionized, "grade 3" water conforming ISO 3696. Tests are done
in a draft-free room at a constant (±0.5°C) temperature of water, pipette and air between 15°C
to 30°C. The relative humidity must be above 50%. Especially with volumes under 50 µl the
air humidity should be as high as possible to reduce the effect of evaporation loss. Special
accessories, such as the evaporation trap, are recommended.
Procedure to check calibration
The pipette is checked with the maximum volume (nominal volume) and with the minimum
volume. A new tip is first pre-wetted 3-5 times and a series of ten pipettings is done with
both volumes. A pipette is always adjusted for delivery (Ex) of the selected volume. Use of
forward pipetting technique is recommended. The maximum permissible errors are designed for
forward method. It is recommended to calibrate all channels of the multichannel pipette, but a
suitable method is also to calibrate only the edge channels. Adjustment check prior calibration is
done using one of the middle channels. It is recommended to use the ISO8655 calibration limits
presented in the following tables or user-defined specifications.
Procedure:
1. Do 10 pipettings with the minimum volume.
2. Do 10 pipettings with the maximum volume.
3. Calculate the inaccuracy (A) and imprecision (cv) of both series.
4. Compare the results to the limits.
If the calculated results are within the selected limits, the adjustment of the pipette is correct.
readable graduation
0.00 1 mg
0.01 mg
0.1 mg
8
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