1 Safety instructions
Liquisys M CXM 223 / 253 HART
4
EHauser
1
Safety instructions
1.1
Notes on safety conventions and icons
General safety instructions
Electrical symbols
#
Warning!
This symbol alerts you to hazards which could cause serious injuries as well as damage to the instrument if
ignored.
"
Caution!
This symbol alerts you to possible faults which could arise from incorrect operation. They could cause
damage to the instrument if ignored.
!
Note!
This symbol indicates important items of information.
%
DC voltage
A terminal at which DC voltage is applied or through which DC flows.
&
AC voltage
A terminal at which (sine-form) AC voltage is applied or through which AC flows.
)
Ground connection
A grounded terminal, which, from the user’s point of view, is already grounded using a ground system.
*
Protective earth terminal
A terminal which must be grounded before other connections may be set up.
+
Equipotential connection
A connection which must be connected to the grounding system of the equipment. This can be, for
example, a potential matching line of a star-shaped grounding system, depending on national or company
practice.
/
Double insulation
The equipment is protected with double insulation.
b
Alarm relay
Input
Output
