Division:
13 I 77
Intended use
The ST1 safety weighing enclosures are used exclusively for weighing or other manipulations
of hazardous substances that pose a risk to persons and the environment in the event of a
release.
Observance of these operating instructions is part of the intended use. In the case of other
manipulations, we as a manufacturer offer support with an appropriate risk analysis.
Through his own risk assessments and operating instructions, the operator must ensure that
the equipment is only used within the limits of its technical specifications and that only work
is carried out and substances processed with it for which the equipment is suitable.
The ST1 safety weighing enclosures may only be installed and operated in an area in which
an explosive atmosphere is never present as a mixture of air and flammable gases, vapours
or aerosols or in the form of a cloud of combustible dust contained in the air (non-ATEX zone
according to EC Directive 94/9/EC).
The operator must ensure that no substances are processed in the work area in quantities
that could lead to the formation of an explosive atmosphere.
This must also be observed when cleaning the ST1 weighing enclosure with flammable
solvents that could lead to the formation of an explosive atmosphere.
During cleaning with these solvents, it is essential that the safety weighing enclosure and the
filtration and ventilation systems are switched on!
The ST1 series complies with the protective measures required by TRGS 500 (Technical
Rules for Hazardous Substances) and is to be regarded as a highly effective extraction
system. It is suitable for personal protection in accordance with EN 14175-3 for fume
cupboards and also complies with the ASHREA 110 standard.
The ST1 series has been tested according to EN 689 and ISPE guidelines with surrogate
substances by InfraServ GmbH & Co. Höchst KG. (The test protocol can be found in
appendix D).
The HEPA filtration system used is certified according to DIN/EN 1822.
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