Endress+Hauser WirelessHART Fieldgate SWG70, Руководство по эксплуатации

Страница: 9 / 138

WirelessHART Fieldgate SWG70 Safety
E Hauser 9
1.7 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 icon in the margin.
Safety conventions
Type of protection .
Electrical symbols .
Icon Meaning
DANGER!
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result
in serious or fatal injury.
WARNING!
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result
in serious or fatal injury.
CAUTION!
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result
in minor or medium injury.
NOTICE!
This symbol contains information on procedures and other facts which do not result in
personal injury.
Icon Meaning
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 in accordance with the specifications in the certificate or in a safe 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.
Icon Meaning
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.