About this document iTEMP TMT72
4 Endress+Hauser
1 About this document
1.1 Document function
These Operating Instructions contain all the information required in the various life cycle
phases of the device: from product identification, incoming acceptance and storage, to
installation, connection, operation and commissioning, through to troubleshooting,
maintenance and disposal.
1.2 Symbols used
1.2.1 Safety symbols
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in
serious or fatal injury.
This symbol alerts you to a potentially dangerous situation. Failure to avoid this situation
can result in serious or fatal injury.
This symbol alerts you to a potentially dangerous situation. Failure to avoid this situation
can result in minor or medium injury.
This symbol alerts you to a potentially harmful situation. Failure to avoid this situation can
result in damage to the product or something in its vicinity.
1.2.2 Electrical symbols
Symbol Meaning
Direct current
Alternating current
Direct current and alternating current
Ground connection
A grounded terminal which, as far as the operator is concerned, is grounded via a
grounding system.
Potential equalization connection (PE: protective earth)
Ground terminals that must be connected to ground prior to establishing any other
connections.
The ground terminals are located on the interior and exterior of the device:
• Interior ground terminal: potential equalization is connected to the supply network.
• Exterior ground terminal: device is connected to the plant grounding system.
1.2.3 Symbols for certain types of information
Symbol Meaning
Permitted
Procedures, processes or actions that are permitted.
Preferred
Procedures, processes or actions that are preferred.
Forbidden
Procedures, processes or actions that are forbidden.
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