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34
Chapter 4: High Performance Features and Safety
29. Use the smallest possible quantity of chemical(s) within the
enclosure and never exceed the amount, which can be
effectively adsorbed by the Odor Control carbon filter
before breakthrough.
30. For weighing procedures, adjust face velocity between 60
and 100 FPM for effective operation.
31. Leave the blower on for at least one minute after work in
the enclosure has been completed.
32. If a chemical, powder or particulates are spilled on the
work surface, DO NOT switch off the blower until all
traces have been removed.
33. Tag enclosures with appropriate warning, if filters have
been removed for service.
34. If the blower fails during use, processes should cease and
the area should be vacated and ventilated.
35. Always refer to the NIOSH Pocket Guide to Chemical
Hazards before proceeding.