Labconco Protector Demonstration Hoods 3945021 - Manual (Page 24)

Chapter 4: High Performance Features and Safety Precautions
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Safety Precautions
Although the hood has been engineered to maintain optimum operator
safety, caution should always be used while working. Prior to using the
hood, check to make sure that the exhaust blower is operating and that
air is entering the hood at its specified face velocity. The use of an
airflow monitor is recommended to alert the user if there is a problem
with airflow.
Use good housekeeping in the hood at all times. Clean up spills
immediately. Periodically clean enclosure interior.
Do not overload the work surface with apparatus or work material. The
safe operation of the hood is based upon having proper airflow through
the structure. Do not place large, bulky objects such as block heaters,
directly on the work surface. Instead, elevate the object 3/4" on blocks
to allow a flow of air under the object and into the rear baffle exhaust
slots. Ensure blocks are level and secured in place.
Blocking large portions of the rear baffle will change the airflow pattern
in the hood causing turbulence. (Do not store containers or supplies
against the rear baffle, as this will affect airflow).
Always work with your hands as far back in the hood as possible. It is
best to keep all powders, chemicals and apparatus inside the lower air
foil of the hood.
Do not work with chemicals in this hood without the exhaust system
running. Perchloric acid use in this hood is prohibited.
High-level radioisotope materials are prohibited in this hood.
Avoid cross drafts and limit traffic in front of the hood. Air
disturbances created may draw contaminants out of the hood.
The hood should be tested by a qualified certification technician before it
is initially used. The hood should be validated whenever it is relocated,
serviced or at least annually thereafter.
The use of safety goggles, protective clothing, gloves and any other
personal protective equipment recommended by your safety officer
should be used.
The sash should remain in the down position while using the hood.
Proper operation of the hood depends largely upon its location and the
operator’s work habits. Consult the references in Appendix D.