Enviro ST1 - Page 42

Division:
42 I 77
Planning and work preparation
The entire interior of the ST1 safety weighing enclosure should always be
considered contaminated. This means that all equipment and materials as well
as the employee's gloved hands should only leave this area after appropriate
decontamination measures have been carried out. For this reason, careful and
forward planning of the materials needed is important.
Generally, the following applies to the contents of the ST1 safety weighing enclosure: Leave
as much as necessary and as little as possible in the enclosure.
In addition to the individually required equipment and materials, the following materials
should be present in the ST1 safety weighing enclosure (they must be labelled accordingly as
they are contaminated after use):
 Scale
Always place the printer outside the ST1 safety weighing enclosure as contamination can
very easily be released to the outside via the printer paper.
When selecting the scale, make sure that it has a protection of the weighing chamber
that can be opened without touching it by hand, if possible, so that the outside of the
scale is not contaminated. It is optimal if substances can be weighed directly in the
desired vessel (e.g. volumetric flask). All elements of the scale should be easy to clean.
 Pens (marked)
The pens needed for labelling vessels or for recording measurement data should be
available and remain in the ST1 safety weighing enclosure.
 Cleaning cloths in a container if possible (marked)
The scale and the work surface in the ST1 safety weighing enclosure should be cleaned
after each weighing process. The required cleaning cloths must be deposited in the ST1
safety weighing enclosure.
 Sealable storage container filled with liquid (water) for used measuring spatulas
(marked)
The measuring spatulas required for the weighing process are placed directly in the
container filled with solvent to prevent further dusting.
Danger from a contaminated interior