RADWAG MYA 5.3Y.F1 Microbalance - Manual (Page 94)

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24. PIPETTE CALIBRATION
Balance allows pipette calibration by means of a special balance software or by means
of cooperation with computer software “Pipettes” intended for pipettes calibration
(workstation for pipettes calibration).
Before pipettes calibration a special set must be mounted inside the draft shield. The set
is an atypical balance equipment. See the picture below for set assembly instruction.
Balance with a set for pipettes calibration:
Calibration set assembly procedure:
•
dismantle the weighing pan and the draft shield
• place the following elements inside the chamber:
• weighing pan shield (1),
• bottom ring (2),
• weighing pan (3),
• calibration vessel (5),
• evaporation ring (6),
• glass cover (7),
• supplementary cover (8),
• or glass cover (4),
Evaporation ring minimizes measurement errors being a result of liquid evaporation
occurring while weighing process.
Before pipettes calibration distilled water must be poured into evaporation ring, the
amount of water should not exceed 2/3 of the ring height.
The set may be operated after about an hour – this period of time is required for
moisture stabilisation. One must remember to control the level of distilled water –
surface of the vessel should remain covered with it. Excess of water may be removed by
means of automatic pump or external pipette.
In order to minimize both, changes of moisture content inside the weighing chamber
and negative effect of air blows during opening the chamber door, the liquid should be