Safety Conventions And Symbols - Endress+Hauser Liquicap M FTI51 Operating Instructions Manual

Liquicap M FTI51, FTI52
Endress+Hauser
1.4

Safety conventions and symbols

We have defined the following safety instructions to indicate safety-related or alternative
procedures. Each instruction is identified by a corresponding pictogram.
Safety instructions
#
Warning!
This symbol indicates an action or procedure which, if not performed correctly, can result in serious
injury, a safety hazard or the destruction of the device.
"
Caution!
This symbol indicates an action or procedure which, if not performed correctly, can result in injury or
destruction of the device.
!
Note!
This symbol indicates an action or procedure which, if not performed correctly, can have an indirect
effect on operation or trigger an unexpected response on the part of the device.
Type of protection
0
Explosion-protected, prototype-tested apparatus
If this symbol appears on the nameplate of the device, the device can be used in hazardous or non-
hazardous areas according to its approval.
-
Hazardous areas
In the drawings in these Operating Instructions, this symbol identifies hazardous areas. Devices
located in hazardous areas and lines for these devices must have corresponding explosion protection.
.
Safe areas (non-hazardous areas)
In the drawings in these Operating Instructions, this symbol identifies non-hazardous areas. Devices
in the non-hazardous area also must be certified if the connecting lines lead into the hazardous area.
Electrical symbols
%
Direct current
A terminal at which DC voltage is present or through which DC voltage flows.
&
Alternating current
A terminal at which AC voltage (sinusoidal) voltage is present or through which AC flows.
)
Ground connection
A grounded terminal which, from the viewpoint of the user, is grounded via a grounding system.
*
Protective ground connection
A terminal that has to be grounded before other connections can be made.
+
Equipotential connection
A connection that has to be connected to the grounding system of the plant. This can be a potential
equalization line or a radial grounding system depending on national and company codes of practice.
Temperature resistance of the connecting cables
t >85°C
Indicates that the connecting cables must be able to withstand temperatures of at least 85 °C.
Safety instructions
7