Division:
52 I 77
The bar-shaped discharge electrode (1) mounted above the front flap ionises the air on a
large scale in the interior of the safety enclosure with the aid of an electric field. The
necessary high voltage in the range of 4-6 kV is generated by the high-voltage grid (2).
The ionised air molecules can neutralise charges adhering to surfaces. The spot discharge
electrode (3) is attached to the opening of the cable gland on the left or right side of the
safety weighing enclosure.
Depending on the customer's specification, the high-voltage power supply unit is put into
operation via the main switch of the safety enclosure or the ON/OFF switch of the high-
voltage power supply unit. Then, the discharge electrodes are immediately ready for use.
With its flexible, adjustable gooseneck, the discharge electrode can be installed in a position
suitable for working in the safety enclosure.
Use of electrostatic discharge systems
Bar-shaped discharge electrodes are intended to neutralise static charges on the surfaces
inside the safety weighing enclosure. Due to the greater distances to the discharge
electrode, these are processes that take place over a longer period of time. If strongly
charged surfaces such as spatulas, vessels or powder in vessels are to be discharged, they
must be brought close to the discharge electrode: The unloading process takes a few
seconds.
For discharging powders or small surfaces, the spot discharge electrode is more suitable for
ergonomic reasons. You can shape the gooseneck so that the electrode tip is in a position
suitable for your application. For discharging statically charged powders, the opened vessel
is passed under the spot discharge electrode. The silicone plate may touch the vessel;
however, a small distance avoids contamination with powder. The tip should not be
immersed in the powder. The duration of the discharge process depends on many factors:
Empirical values are 3-20 seconds.
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