RADWAG UYA 4Y.PLUS Ultra-Microbalances Manuel De L'utilisateur page 102

undo 4 screws fixing it to the housing (see the figure). Now you can install pipette calibration set,
follow the above instruction.
Balance with disassembled anti-draft chamber and with installed calibration set.
Now pipettes calibration can be carried out.
< Pipettes calibration> is a working mode allowing you to determine errors of measurement of
piston pipettes volume. The errors can be determined either with reference to ISO 8655 standard or
your own requirements.
In case of calibration carried out with reference to ISO 8655 standard, the errors are automatically
selected for particular volume, as specified in the standard (refer to: table of errors, ISO 8655
standard).
Pipette calibration mode enables:
•
calibrating pipettes of fixed-volume or variable-volume, and single- or multi- channel pipettes.
•
creating pipettes database providing the following information: pipette name, code, tested
volume, etc.,
•
calculating results on the basis of:
•
average volume of a pipette (channel),
•
systematic error es (accuracy error),
•
random error CV (repeatability error),
•
carrying out automated measuring procedures conditioned by pipette's type,
•
storing calibration results in a database (in a form of reports on calibration process),
•
printing reports on pipettes calibration processes,
•
exporting test reports.
During the procedure, accuracy and repeatability errors are determined for the tested volume. In
case of pipettes with adjustable volume, the software enables declaring up to 5 volume values (from
total pipette's range) that are to be checked during calibration process.
Use only distilled water for pipettes calibration.
Ambient conditions crucial for high accuracy calibration:
•
The ambient temperature of the pipette, tip and liquid:
•
20°C ÷ 25°C, during weighing it must be stabilized within ± 0.5.°C
•
Relative humidity: 50 ÷ 75%.
•
Pipette, tips and distilled water have to be subjected to temperature stabilization carried out
directly in the weighing room. The standard recommends the acclimatization for at least 2
hours.
Standard chamber Automatic chamber, XA 4Y.PLUS
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