DIN EN 60679-4:1998-11

1 General
    1.1 Scope
    1.2 Normative references
2 Preferred values for ratings and guidance on detail
    specifications
    2.1 Preferred values for ratings and characteristics
    2.2 Information to be prescribed in detail
          specifications
3 Capability approval
    3.1 Eligibility for capability approval
    3.2 Structural similarity
    3.3 Procedures for capability approval
    3.4 Capability manual
    3.5 Capability qualifying components (CQC)
    3.6 Inspection requirements for CQCs
    3.7 Programme for capability approval
    3.8 Capability approval report
    3.9 Abstract of description of capability approval
    3.10 Modifications likely to affect the capability
          approval
    3.11 Initial capability approval
    3.12 Maintenance of capability approval
    3.13 Rework and repair work
    3.14 Quality conformance inspection
    3.15 Screening procedures
4 Test and measurement procedures
Tables
1 Test schedule for initial capability approval
2 Periodic tests for maintenance of capability approval
Figures
1 Selection of CQCs - All methods of construction
2 Test plan for deposition for electrode material CQCs
3 Test plan for bonding CQCs
4 Test plan for component assembly CQCs
5 Test plan for alignment of CQCs
6 Test plan for enclosures of CQCs
7 Test plan for mounting CQCs
8 Test plan for frequency, input, output and temperature
    range CQCs
9 Test plan for frequency/load coefficient, frequency/
    voltage coefficient, external frequency adjustment
    and FM characteristics CQCs
10 Test plans for climatic performance CQCs
11 Test plan for frequency ageing CQCs
Annexes
A Example of layout of an abstract of description of
    capability approval
B Layout of the front page of a CQC specification for
    process control
C Layout of the front page of a CQC specification to
    demonstrate a boundary or limit
ZA (normative) Normative references to international
    publications with their corresponding European
    publications

Applicable to quartz crystal controlled oscillators as custom built products or as standard catalogued items, where the quality is assessed on the basis of capability approval. Gives the preferred ratings and characteristics, together with appropriate tests and measuring procedures in IEC 60679-1, and gives the general performance requirements for use in detail specifications for quartz crystal controlled oscillators.