Sterling SDF 250 - Manual (Page 7)

SDF 250/400/500
General Information 1-2
1.1. Warnings and symbols
The following warnings and symbols are used in these operating instructions:
This symbol indicates danger to life! Fatal or serious injury is
possible if the corresponding instructions, regulations or
warnings are not observed.
L
This symbol indicates that serious injury is possible if the
corresponding instructions, regulations or warnings are not
observed.
F
This symbol indicates that extensive damage to equipment is
possible if the corresponding instructions, regulations or
warnings are not observed.
&
This symbol indicates information important for becoming
familiar with the equipment, i.e. technical correlations.
$
This symbol indicates that a technical term is explained at this
point.