BUCHI Extraction System B-811 LSV User Manual
Page 8
2 Safety
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B-811 Operation Manual, Version G
2 .5 .2
Other hazards
WARNING
Certain solvents in or in the vicinity of the Extraction System B-811 can form peroxides and/or are
highly inflammable.
Always be aware of the explosion risk when working with hazardous substances or with
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substances of unknown composition.
Always provide a good ventilation within or in the vicinity of the system.
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2 .5 .3
Safety measures
In case a safe operation of the instrument no longer appears possible, the instrument must be shut
down and secured against unintentional operation.
It must be assumed that safe operation is no longer possible:
if there is visible instrument damage,
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following a long period of storage under unfavorable conditions,
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following transport under difficult conditions.
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Always wear personal protective equipment such as protective eye goggles, protective clothing and
gloves when working with the instrument.
2 .5 .4
Safety elements
Electrics:
The main power switch automatically turns to the zero position (off) if the power supply is overloaded
or a short circuit occurs.
Electronics
The heating elements are equipped with an electronic over-temperature protection.
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If no cooling water is detected at the cooling water output (for example, due to a leak in the
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condenser), the electronic will stop all processes.
The protective shield protects operators from broken glass in case of an accident or explosion.
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An extraction position is only activated if a beaker is in contact with the lower heating element. In
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order to start a program, at least one extraction position must have been activated. If one of the
glass beakers break, the program closes the glass valves and terminates the processing of all
activated heating elements.
If one of the solvent beakers gets dry (e.g. due to a defective seal or an open cooling unit), the
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software turns off the corresponding heating element.
It is possible to release solvent and/or open the gas valve at any time during operation (only appli-
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cable for activated extraction positions).
Only high quality borosilicate 3.3 glass is used. In order to prevent glass breakage, the cooling
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supply connections are threaded and can therefore be screwed on and off.