Notes On Safety Conventions And Symbols - Endress+Hauser Levelflex M FMP40 Operating Instructions Manual

Levelflex M FMP40 FOUNDATION Fieldbus
Endress+Hauser
1.4

Notes on safety conventions and symbols

In order to highlight safety-relevant or alternative operating procedures in the manual, the following
conventions have been used, each indicated by a corresponding symbol in the margin.
Safety conventions
#
Warning!
A warning highlights actions or procedures which, if not performed correctly, will lead to personal
injury, a safety hazard or destruction of the device.
"
Caution!
Caution highlights actions or procedures which, if not performed correctly, may lead to personal
injury or incorrect functioning of the device.
!
Note!
A note highlights actions or procedures which, if not performed correctly, may indirectly affect
operation or may lead to an device response which is not planned.
Explosion protection
0
Device certified for use in explosion hazardous area
If the device has this symbol embossed on its name plate it can be installed in an explosion hazardous
area.
Explosion hazardous area
-
Symbol used in drawings to indicate explosion hazardous areas. Devices located in and wiring
entering areas with the designation "explosion hazardous areas" must conform with the stated type of
protection.
.
Safe area (non-explosion hazardous area)
Symbol used in drawings to indicate, if necessary, non-explosion hazardous areas. Devices located in
safe areas still require a certificate if their outputs run into explosion hazardous areas.
Electrical symbols
%
Direct voltage
A terminal to which or from which a direct current or voltage may be applied or supplied.
&
Alternating voltage
A terminal to which or from which an alternating (sine-wave) current or voltage may be applied or
supplied.
)
Grounded terminal
A grounded terminal, which as far as the operator is concerned, is already grounded by means of an
earth grounding system.
*
Protective grounding (earth) terminal
A terminal which must be connected to earth ground prior to making any other connection to the
equipment.
+
Equipotential connection (earth bonding)
A connection made to the plant grounding system which may be of type e.g. neutral star or
equipotential line according to national or company practice.
Temperature resistance of the connection cables
t >85°C
States, that the connection cables must be resistant to a temperature of at least 85 °C.
Safety instruction
For safety instructions refer to the manual for the appropriate device version.
Safety instructions
5