1. ABOUT THE OPERATING
INSTRUCTIONS
The Operating Instructions describe the entire life cycle of the
product. Please keep the Operating Instructions in a safe place,
accessible to all users and any new owners.
The Operating Instructions contain important safety
information.
Failure to comply with these instructions can lead to hazardous
situations. Pay attention in particular to the chapters "3. Basic
safety information" and "2. Intended use".
▶ Whatever the version of the product, the Operating Instructions
must be read and understood.
1.1. Symbols used
danger
Warns against an imminent danger.
▶ Failure to observe this warning results in death or in serious injury.
Warning
Warns against a potentially dangerous situation.
▶ Failure to observe this warning can result in serious injury or
even death.
CaUTiOn
Warns against a possible risk.
▶ Failure to observe this warning can result in substantial or minor
injuries.
nOTiCe
Warns against material damage.
Indicates additional information, advice or important
recommendations.
Refers to information contained in these Operating Instruc-
tions or in other documents.
▶ Indicates an instruction to be carried out to avoid a danger, a
warning or a possible risk.
→ Indicates a procedure to be carried out.
1.2. Definition of the word product
The word "product" used in these Operating Instructions always
refers to the conductivity sensor Type 8221.
4
About the Operating Instructions
Type 8221
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