RADWAG 4Y Serie Manual Del Usuario página 101

Prior installation of the chamber, disassemble glass draft shield, the panes and top frame.
Disassembly procedure is described in 'Maintenance Activities' section. Now you can assemble the
chamber for pipettes calibration.
Evaporation ring minimizes measurement errors being a result of liquid evaporation occurring in the
course of the weighing process.
Prior pipettes calibration, distilled water must be poured into the evaporation ring, the amount of
water cannot exceed 2/3 of the ring height. The set may be operated after about an hour – this period
of time is required for humidity stabilisation. Remember to control the level of distilled water – surface
of the vessel has to remain covered with it. Excess of water may be removed by means of an
automatic aspirator or an external pipette.
In order to minimize both changes of moisture content inside the weighing chamber and negative
effect of air blows during opening of the chamber door, the liquid has to be dosed by means of
pipette through an opening located in the top cover/lid of the weighing chamber. In the course of
calibration it is allowed to use a balance without an anti-draft chamber. This requires disassembly of
the panes and top frame (XA 4Y.A series balances). For panes disassembly instruction read
MAINTENANCE ACTIVITIES section, for frame disassembly read below. In order to remove frame,
Procedure:
1. Disassemble chamber seat
2. Install the bottom ring (10)
3. Install the weighing pan (4)
4. Carefully
5. Install the glass vessel (8)
6. Install the evaporation ring (6),
7. Apply glass lid (3)
8. Apply clamp (2)
9. Tighten protecting screw (1)
Caution! Be careful so as not to cause any
damages to the balance mechanism.
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protection (12)
apply the
chamber connecting it to the
connector located
balance base (7)
fill it with distilled water
glass
in the