Maintenance & Repair - ABB TZIDC Manual

TZIDC DIGITAL POSITIONER | DS/TZIDC-EN REV. G
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.
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
• 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 Close inspection
(every 3 months) (every 6 months)

Responsibility of the operator
25
Detailed inspection
(every 12 months)
