Metrohm 774 Oven Sample Processor - Manual (Page 16)

2 Installation
774 Oven Sample Processor, Instructions for use 10
2.3 Safety considerations
• Do not operate the 774 Oven Sample Processor without protective cov-
ers.
The plug cover protects the connectors from spillage. Organic solvents
are always a potential serious fire hazard.
The protective cover of the guide head prevents the access to the stroke
path of the injection needle. Never get your hand beneath the protective
cover while operating the instrument.
• If you work with inflammable samples the 774 Oven Sample Processor
has to be operated under a safety hood. In addition to that you have to
use nitrogen or another inert gas instead of the integrated air pump. See
chapters 2.2.4 and 4.2.
• Always wear safety goggles while working with the 774 Oven Sample
Processor.
The oven can reach 250 °C and more. The heating block is covered by
a protective jacket. Keep your hands off the heated oven or the sam-
ple in work. Do not reach under the protective cover.
Caution! Just after processing sample vials may be hot, too. Even parts of
the sample rack can reach elevated temperature up to 60 °C.
• Allow the sample vials to cool off before removing vials from the rack or
detaching the sample rack .
The 774 Oven Sample Processor may be used for sample processing with
extraction methods at higher temperatures. These kinds of method require
special safety precautions.
Before working with inflammable organic solvents read the relevant
safety sheets or consult common accessible safety literature.
• Do not heat organic solvents to their flash point!
• Use nitrogen or another inert gas.
If failure or malfunctioning occurs during operation of the 774 Oven Sample
Processor, it is recommended to first search for the cause with the help of
the diagnostic functions (see Instructions for Use, page 143). If this is of no
help in rectifying the disorder or the cause of the malfunction cannot be
identified, the Metrohm Service Department should be consulted.