VistaLab 2100-0003, Руководство по эксплуатации, Страница: 11 / 20

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Calibration
ali-Q 2’s aliquot mode volume delivery is factory calibrated to aliquot the volume set on the aliquot volume dial to the
factory specs, as listed on Technical Specifications section, in a state-of-the-art ISO 17025 accredited calibration lab
under the following conditions:
- Temperature: 20°C - 22°C (68°F - 71.6°F)
- Relative humidity: 45% - 75%
- Using Wobble-not serological pipet
- Using ISO 3696 Grade 3 purified water
NOTE: Using ali-Q 2 with different liquids more/less dense than water may slightly affect the accuracy of the
dispensed aliquots. However, precision is always maintained with the ali-Q 2 thanks to its Intelligent Measuring
System. To adjust the accuracy of your unit, see page 12.
Calibration Verification :
VistaLab recommends sending ali-Q 2 to VistaLab for calibration, or performing verification, at least once a year or
whenever conditions and equipment change.
In-lab Verification / Adjustment:
Users can verify the accuracy of the dispensed aliquots in four ways:
1 Gravimetric - Use a digital scale and water, determine the weight (in grams) of the dispensed aliquot. See the
Performance Verification document for gravimetric procedure at www.vistalab.com/support
2 Colorimetric - Use a spectrophotometer to measure the absorbance value of diluted dye in a solvent of controlled
volume. Absorbance value is then converted into a volume (µL).
3 Visual
- Use an approved graduated cylinder (Class A, To Contain, calibration certified).
4 Visual (least reliable*) - Use the volume graduations on the serological pipet as a reference of how much liquid is
being dispensed.
* Serological pipets in general have ±2% accuracy (at full scale) of their volume graduations, so this is the least accurate
way of verifying.