Notes On Safety Conventions And Icons - Endress+Hauser Fieldbus Levelflex M FMP43 Operating Instructions Manual

Levelflex M FMP43 with FOUNDATION Fieldbus
Endress+Hauser
1.4

Notes on safety conventions and icons

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 instructions
Warning!
#
Indicates
an action or procedure which, if not performed correctly, can result in serious personal
injury, a safety hazard or the destruction of the instrument.
Caution!
"
Indicates
an action or procedure which, if not performed correctly, can result in personal injury or the
incorrect operation of the instrument.
!
Note!
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 instrument.
Explosion protection
0
Explosion protected, type-examined equipment
If the instrument has this symbol embossed on its nameplate, it can be used in a hazardous area or a
non-hazardous area, according to the approval
Explosion hazardous area
-
This symbol is used in the drawings of these Operating Instructions to indicate hazardous areas.
Instruments in hazardous areas, or cables for such instruments, must have appropriate explosion
protection.
Safe area (non-hazardous area)
.
This symbol is used in the drawings of these Operating Instructions to indicate non-hazardous areas.
Instruments in the non-hazardous area also have to be certified if connecting cables lead into the
hazardous area.
Electrical symbols
%
Direct current
A terminal to which DC voltage is applied or through which direct current flows.
&
Alternating current
A terminal to which alternating voltage (sine-wave) is applied or through which alternating current
flows.
)
Ground connection
A grounded terminal which, as far as the operator is concerned, is grounded by means of a grounding
system.
*
Protective ground connection
A terminal which must be connected to ground prior to making any other connection to the equipment.
Equipotential connection
+
A connection that has to be connected to the plant grounding system:
This may be a potential equalization line or a star grounding system depending on national or company
codes of practice.
Temperature resistance of the connecting cables
t >85°C
Indicates that the connecting cables have to withstand a temperature of 85 C at least.
Safety instruction
For safety instructions refer to the manual for the appropriate instrument version.
Safety instructions
7