DON-H
DON-H
01/0721
page 33
15.1.4
Servicing, maintenance
Definition of terms according to IEC 60079-17:
Maintenance and repair:
A combination of all activities carried out in order to
keep an object in a condition or to bring it back into a condition that meets the
requirements of the relevant specification and ensures the execution of the
required functions.
Inspection:
An activity that involves the careful examination of an object with the
aim of making a reliable statement about the condition of this object, without
dismantling or, if necessary, with partial dismantling, supplemented by measures
e.g. measurements is carried out.
Visual inspection:
A visual inspection is an inspection in which visible defects
are found (e.g. missing screws) without the use of devices or tools.
Close-up inspection:
An inspection that, in addition to the aspects of the visual
inspection, identifies defects such as loose screws that can only be removed
through the use of access devices (e.g. if necessary stairs) and tools. For close-
up tests, a housing usually does not need to be opened or the equipment needs
to be de-energized.
Detailed inspection:
An inspection in which, in addition to the aspects of close-
up inspection, defects such as loose connections, which can only be identified by
opening housings and / or, if necessary, using tools and testing equipment, are
treated.
Maintenance measures may only be carried out by qualified persons.
Only accessories that meet all the requirements of the European directives and
national legislation may be used in potentially explosive areas.
Maintenance measures including dismantling the flow meter may only be
carried out in a non-explosive atmosphere.
Components may only be replaced with original spare parts that are also
approved for use in Ex areas. Repairs only by the manufacturer or specialist
workshop.
The products must be regularly serviced and cleaned in the Ex area. The
intervals are determined by the operator in accordance with the environmental
stresses on site.
Activity
Visual
inspection
per month
Close-up
inspection
every 6 months
Detailed
inspection
every 12
months
1
Visual inspection of the flow
meter for damage and remove
dust deposits
●
2
Check for integrity and function
●
3
Examination of the entire
system
In the operator's area of responsibility
Summary of Contents for DON-05
Page 1: ...Operating Instructions for Oval Wheel Flowmeter High pressure Model DON H...
Page 9: ...DON H DON H 01 0721 page 9 Note The electronic option H0 is available with reed switch output...
Page 43: ...DON H DON H 01 0721 page 43 17 Statement of Conformity...
Page 44: ...DON H page 44 DON H 01 0721...
Page 45: ...DON H DON H 01 0721 page 45...
Page 46: ...DON H page 46 DON H 01 0721...
Page 47: ...DON H DON H 01 0721 page 47...
Page 48: ...DON H page 48 DON H 01 0721 18 State of safeness...
