User manual

- 115 -
− Humidity
− Pressure
− Z coefficient
− Measurements and statistics
− Statistics
− Status
− Empty line
− Dashes
− Signature
− Non-standard printout
24.5. Working mode activating procedure
Carrying out pipettes calibration process requires installing an adapter for
pipettes calibration. The adapter does not come standard with the balance.
The adapter for pipettes calibration is a simple supplementary device dedicated
for calibration and checking of piston pipettes. It is designed for application on
balances MYA 21.3Y and XA 52.3Y.
The adapter has been designed to minimize evaporation occurring in liquid
handling procedures. It consists of a minimized weighing chamber installed
inside the weighing chamber of a balance. The adapter features an evaporation
ring and a dedicated weighing pan for central locating of the measuring vessel.
Application of the adapter for pipettes calibration prevents from liquid
evaporation during calibration process. Small dimensions of the adapter,
combined with the evaporation ring enable maintaining high humidity rate inside
the weighing chamber and the measuring vessel, thus stopping liquid
evaporation process.
Carried out research proved that the adapter for pipettes calibration eliminates
or considerably reduces liquid evaporation process, which is essential for correct
gravimetric calibration of piston pipettes.
Selecting an appropriate adapter and balance mostly depends on type of
calibrated pipettes.
Before starting pipettes calibration process, assembly the adapter inside
balance’s weighing chamber, and insert data on pipettes to be calibrated,
including complete pipette characteristics and values of errors (see: Database of
Pipettes).
The following step is setting process’s main option:
• Number of measurements
• Request batch number (YES/NO)
• Operation with ISO 8655 (YES/NO)
• Acquire ambient conditions from THB module (YES/NO)
Caution:
Description of options and settings are given in point 24.1 of this user manual.