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The AT550 is classied as Class 1 Equipment
Class 1 Equipment is equipment in which protection against electric shock does not rely
on basic insulation only. It also includes an additional safety precaution that provides
for the connection of the equipment to a protective earth conductor in the xed wiring
of the installation in such a way that accessible metal parts cannot become live in the
event of a failure of the basic insulation.
The AT550 is classied as Class B Equipment
Class B Equipment provides an adequate degree of protection against electrical shock,
particularly regarding allowable leakage currents and reliability of the protective earth
connection.
The AT550 is classied as IPX0 Equipment
IPX0 Equipment is ordinary equipment enclosed without protection against ingress
of water.
The AT550 is not suitable for use in the presence of ammable anesthetic mixtures
with air or with oxygen or nitrous oxide.
According to the mode of operation, the AT550 is a Continuous Operation
instrument.
Classication
Symbol Information
The following symbols appear on the instrument:
CAUTION - Indicates that important operating and maintenance instructions are included
in this User’s Guide.
Type B Product Classication
Class 1 Equipment, Continuous Operation
Alternating Current
Protective Earth
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