YOKOGAWA ZO21DW, User Manual, Page: 4 / 39

<INTRODUCTION>
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IM 11M03A02-00E
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Safety and Modification Precautions
• Follow the safety precautions in this manual when using the product to ensure protection
and safety of personnel, product and system containing the product.
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The following safety symbols are used on the product as well as in this
manual.
WARNING
This symbol indicates that an operator must follow the instructions laid out in this manual
in order to avoid the risks, for the human body, of injury, electric shock, or fatalities. The
manual describes what special care the operator must take to avoid such risks.
CAUTION
This symbol indicates that the operator must refer to the instructions in this manual in order
to prevent the instrument (hardware) or software from being damaged, or a system failure
from occurring.
CAUTION
This symbol gives information essential for understanding the operations and functions.
NOTE
This symbol indicates information that complements the present topic.
This symbol indicates Protective Ground Terminal.
This symbol indicates Function Ground Terminal. Do not use this terminal as the protective
ground terminal.