SCHOTT Instruments CT 52 Mode D'emploi page 34

Safety notes
The following measures were taken for the protection of the
operator:
• Protection Class I according to VDE 0106 T1 (IEC536) i.e.
protection against electric shocks by grounding all parts which
carry the risk of electric contact.
• This device must only be connected to mains respectacles with
a protective ground.
• Protection IP 20 according to EN 60529,
i.e. regarding the protection against accidently touching live
parts and damage by foreign matter, it has been ensured that
foreign bodies with a thickness or diameter of more than 12 mm
cannot penetrate.
No special precautions were taken against the penetration of water
and dust. The device should therefore not be used in a dusty
atmosphere or in the neighborhood of spray water.
Do not insert wires or tools in any of the openings.
Complete separation from mains is required when:
- all dangers caused by this device are to be avoided,
- cleaning is carried out;
- repairs or maintenance work is about to be carried out
Complete separation means:
Pull out the mains plug!