HP 8360 User Handbook Manual page 12

Instrument Markings ! A
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The instruction documentation symbol. The product is
marked with this symbol when it is necessary for the
user to refer to the instructions in the documentation.
The CE mark is a registered trademark of the European
Community.
The CSA mark is a registered trademark of the
Canadian Standards Association.
This is a symbol of an Industrial Scientific and Medical
Group 1 Class A product.
This is an ON symbol. The symbol ON is used to mark
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the position of the instrument power line switch.
This is an ON symbol. The symbol ON is used to mark
the position of the instrument power line switch.
This is a STANDBY symbol. The STANDBY symbol is
used to mark the position of the instrument power line
switch.
This is an OFF symbol. The OFF symbol is used to
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mark the position of the instrument power line switch.
This is an AC symbol. The AC symbol is used to
indicate the required nature of the line module input
power.