Maintenance, Repair - ABB TZIDC Operating Instructions Manual

6 TZIDC DIGITAL POSITIONER | OI/TZIDC-EN REV. B
... 2 Use in potentially explosive atmospheres

Maintenance, repair

Definition of terms according to IEC 60079-17:
Maintenance
Defines a combination of actions performed to maintain or
restore the condition of an item such that the item meets the
requirements of the relevant specification and performs its
required functions.
I ¬Analyzer module without electronics module (power supply):
Defines an action which involves careful inspection of an item
(either without disassembly or with partial disassembly, as
required) supplemented by measurements, aimed at achieving a
reliable conclusion regarding the condition of the item.
Visual inspection
Defines an inspection which identifies defects which are visible
to the naked eye, such as missing screws, without the use of
access equipment and tools.
Close inspection
Defines an inspection which encompasses the aspects covered
by a visual inspection and in addition, identifies defects such as
loose screws, which can only be detected with the use of access
equipment (e.g. steps) and tools.
Detailed inspection
Defines an inspection which encompasses the aspects covered
by a close inspection and in addition, identifies defects, such as
loose connections, which can only be detected by opening the
housing and / or by using tools and test devices, as needed.
Change from two to one column
Activity
Visual inspection of the positioner for integrity, removal of dust
deposits
Inspection of electric installation for integrity and proper operation
Inspection of the entire installation
Change from one to two columns
• Maintenance and exchange work may be conducted by
qualified specialists only, i.e., qualified personnel in
accordance with TRBS 1203 or similar.
• Only those auxiliary components which fulfill all the
requirements of European and national guidelines and
regulations may be used in potentially explosive
atmospheres.
• Maintenance works that require disassembly of the system
may only be performed in non-hazardous areas. If that is not
possible, however, the usual precautions have to be ensured
according to local regulations.
• Components may only be replaced by original spare parts
which are therefore approved for use in potentially explosive
atmospheres.
• The device must be regularly cleaned when used in
potentially explosive atmospheres. The intervals must be
defined by the operator in compliance with the ambient
conditions present at the operating location.
• After all maintenance and repair work has been completed,
any barriers and plates removed for that purpose must be
put back in their original place.
• The flameproof joints differ from the tables of IEC 60079-1
and may be repaired by the manufacturer only.
Visual inspection
(every 3 months)
Responsibility of the operator
Close inspection Detailed inspection
(every 6 months) (every 12 months)