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7. Maintenance
Maintenance operations are aimed at ensuring trouble-free
operation of the apparatus for the longest possible time.
The following operations must be carried out in accordance
with the IEC 61208/DIN 31051 Standards:
Inspection: Assessment of the actual conditions
Servicing: Measures to be taken to maintain the specified
conditions
Repairs:
Measures to be taken to restore the specified
conditions.
Notes
The following rules must be respected for all maintenance
operations:
– the relative specifications indicated in the “Standards and
specifications” chapter;
– the regulations for safety in the workplace indicated in the
“Putting into service and running” chapter;
– the regulations and specifications in the country of
installation.
7.1. General
It is good practice to keep a maintenance card and a service
book where all the operations carried out can be noted down
in detail, together with the date, description of the anomaly
and the references of data needed to identify the apparatus,
etc. (see chapter 2).
Experience gained in use of the apparatus will allow the
optimal time intervals for interventions to be established. In
any case, inspection of the apparatus not more than one year
after it has been put into service is recommended.
In case of need and for further details, please refer to what is
prescribed in article 10.4.2 of the Standard (IEC 62271-1).
In any case, for any problems, please do not hesitate to
contact us.
7.2. Handling the MAC-R2 electronic card
Management of sensitive devices outside protected areas is
considered to be “field work” and normally includes product
packing, unpacking, installation and maintenance.
In all these cases, handling the devices must be carried out
taking care to keep the potential of your hands and that of the
work surface earthed, with an equipotential connection to the
main grounding branch point.
It is advisable for the operator to wear conductive shoes and
overalls and to wear earthed conductive arm bands.
Fig. 13a-13b shows a maintenance kit consisting of an
arm band and ground connection, both fitted with a 1 MW
integrated resistance.
Using suitable protective means to protect the electronic
devices is an indispensable task requiring diligence and
attention. Inserting these procedures in the normal service
activities allows optimization of resources and underlines their
importance.
The main activities which allow an efficient protection system
to be maintained are:
• making personnel aware of the problems regarding
protection against electrostatic discharges, with reference
to the IEC 61340-5-1 Standards (these problems are often
unknown or underrated)
• training personnel in correct use of protection equipment
and on its perfect working order
• selecting protection materials suitable for the effective
production requirements and using them
• marking the protected area and highlighting the presence of
sensitive devices so as to attract the attention of operators
on correct use of the protection devices
• technicians must always set an example by respecting the
rules and using protection devices appropriately
Observe the following basic rules:
• avoid using tools which are unsuitable for removing the
electronic cards (e.g. screwdrivers, etc.)
• handling the electronic card during maintenance or
replacement operations must be limited to the minimum
time possible
• always hold the electronic card at the edges
• avoid touching the components mounted on the card
• pay attention when cables or connectors have to be
connected or disconnected
• avoid bending the card while inserting it in its seat or during
connector cabling
• avoid damaging the connectors, aligning the pins before
connecting the cable
Fig. 16
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