Endress+Hauser OTR31 Operating Instructions Manual page 5

Temperature switch OTR31, OTR35
1.2.3 Symbols for certain types of information
Symbol
A
, , ...
1. 2. 3.
1.2.4 Symbols in graphics
Symbol Meaning
1, 2, 3,... Item numbers
A, B, C, ... Views
Hazardous area
-
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.
Tip
Indicates additional information.
Reference to documentation
Reference to page
Reference to graphic
Notice or individual step to be observed
Series of steps
Result of a step
Help in the event of a problem
Visual inspection
Symbol Meaning
, , ... Series of steps
1. 2. 3.
A-A, B-B, C-C, ... Sections
Safe area (non-hazardous area)
.
About this document
5