Notes On Safety Conventions And Symbols - Pepperl+Fuchs HART LUC-M Series Operating Instructions Manual

LUC-M** with HART/4 mA ... 20 mA
Safety instructions
1.4
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
!
Explosion protection
Electrical symbols

Notes on safety conventions and symbols

Warning!
#
A warning highlights actions or procedures which, if not performed correctly, will
lead to personal injury, a safety hazard or destruction of the instrument.
Caution!
"
Caution highlights actions or procedures which, if not performed correctly, may
lead to personal injury or incorrect functioning of the instrument.
Note!
A note highlights actions or procedures which, if not performed correctly, may
indirectly affect operation or may lead to an instrument response which is not
planned.
Device certified for use in explosion hazardous area
0
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.
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
States, that the connection cables must be resistant to a temperature of at least
t > 85˚C
85 °C (358 K).
5