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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 eliminate both, changes of moisture content inside the weighing chamber
and negative effect of air blows during opening the chamber door, the liquid should be
dosed by means of pipette through an opening located in the top cover of the weighing
chamber.
It is allowed to use a balance without a draft shield for pipettes calibration. For this
reason both, the draft shield and frame must be dismounted (only XA.3Y.A series
balances). For dismount instruction of draft shield see chapter 2.6., for dismount
instruction of the frame see instruction below.
In order to remove frame one must undo 4 screws fixing it to the housing (as it has
been shown in the picture). In thus prepared balance the pipette calibration set may be
mounted in accordance with above instruction.
