Flex FX2131A Operator's Manual page 9

SYMBOLS (CERTIFICATION INFORMATION)
Symbol Designation/Explanation
This symbol designates that this tool is listed by Underwriters Laboratories.
This symbol designates that this component is recognized by Underwriters
Laboratories.
This symbol designates that this tool is listed by Underwriters Laboratories, to
United States and Canadian Standards.
This symbol designates that this tool is listed by the Canadian Standards
Association.
This symbol designates that this tool is listed by the Canadian Standards
Association, to United States and Canadian Standards.
This symbol designates that this tool is listed by the Intertek Testing Services,
to United States and Canadian Standards.
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