About This Document; Symbols Used - Endress+Hauser Proline Promass E 100 Manual

Symbols used

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About this document

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.
Protective Earth (PE)
A terminal which must be connected to ground prior to establishing any other
connections.
The ground terminals are situated inside and outside the device:
• Inner ground terminal: Connects the protectiv earth to the mains supply.
• Outer ground terminal: Connects the device to the plant grounding system.
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.
Tip
Indicates additional information.
Reference to documentation.
Reference to page.
A
Reference to graphic.
Visual inspection.
Symbols in graphics
Symbol Meaning
1, 2, 3, ... Item numbers
, , , ... Series of steps
1. 2. 3.
A, B, C, ... Views
A-A, B-B, C-C, ... Sections
Hazardous area
-
Safe area (non-hazardous area)
.
Flow direction
Proline Promass E 100
Endress+Hauser