IEC 60988:2009
Current
The latest, up-to-date edition.
Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users
English - French, Russian
08-14-2009
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Purpose and description of loose parts detection
4.1 General
4.2 System definition
4.3 System outline
5 System requirements
5.1 Basic structure and design criteria
5.2 Signal acquisition
5.2.1 Selection and installation of the sound sensors
5.2.2 Preamplifiers
5.3 Signal processing
5.3.1 General
5.3.2 Band-pass filters
5.3.3 External output signal
5.3.4 Amplifier
5.4 Signal storage and signal display
5.4.1 Background noise monitoring
5.4.2 Digitisation and storage
5.4.3 Audio unit
5.4.4 Information display
5.5 Signal monitoring
5.5.1 General
5.5.2 Alarm level monitor
5.5.3 Logic element
5.6 Calibration
5.6.1 General
5.6.2 Mechanical functional test unit
5.6.3 Electrical calibration unit
6 Initial start-up and operation
6.1 System testing before initial start-up of coolant
circulating pump
6.2 Preliminary surveillance without alarm levels
6.3 Adapting the system to the plant requirements
7 Surveillance programme
7.1 General
7.2 Reference recordings
7.3 Measurements during operation
7.3.1 Preliminary surveillance
7.3.2 Surveillance
7.4 Actions following an alarm
7.5 Periodic testing of the system
7.5.1 General
7.5.2 Functional tests
7.5.3 Electrical system test
7.5.4 Test impacts
8 Documentation
Annex A (informative) - Description of loose parts detection
with typical sound traces
Annex B (informative) - Description of detailed functions of
each block of the functional block
diagram
Annex C (informative) - Examples of digital loose parts
monitoring systems
Annex D (informative) - Comments on evaluation
Bibliography
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