Labconco Protector 3944300 User Manual page 24

Chapter 4: High Performance Features and Safety Precautions
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.
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