BUCHI Extraction Unit E-816 HE - Manual (Page 43)

7 Maintenance and repairs
43 E-812/816 Hot Extraction Operation Manual, Version B
7 Maintenance
This chapter gives instructions on all maintenance work to be performed in order to keep the instru-
ment in good working condition.
! WARNING
Death or serious burns by electric current at cleaning.
• Switch off the instrument
• Disconnect the power cord and prevent unintentional restart
• Wait until the instrument is completely dry before reconneting to mains
NOTICE
Risk of housing and instrument damage by liquids and detergents.
• Do not spill liquids over the instrument or parts of it
• Wipe off any liquids instantly
• Use ethanol or soapy water as detergent only
7 .1 Daily maintenance
7 .1 .1 Housing
Check the housing for defects (switches, plugs) and clean it regularly with a damp cloth.
7 .1 .2 Hoses and hose connections
Check the hoses and hose connections for defects (cracks, brittle areas) and replace damaged hoses
immediately.
7 .1 .3 Glass parts
Visually inspect all glass parts for defects (cracks, stars, and splintering) regularly.
Beakers
After extraction, rinse the beakers with hot water and dish washing liquid and use a brush to clean
them thoroughly. Subsequently wash them in a laboratory dish washer.
Sample tubes
Empty the sample tubes into a waste and rinse them with water. They can be washed in a dish
washer as well. Make sure that they do not get in contact with the metal cones.
All glass parts, except for the condenser spiral, must be clean and dry before they are used again. The
glass parts can be dried in a drying oven at 100 °C for 30 minutes or in a vacuum oven at 70 °C for 20
minutes. Afterwards let the glass parts cool down slowly before reusing them, as they are under too
high tension when they are warm/hot.