NEN EN 168000 : 97 AMD 2 98

FOREWORD
Section 1 - Scope
Section 2 - General
2.1 Order of precedence
2.2 Related documents
2.3 Units, symbols and terminology
2.4 Preferred ratings and characteristics
2.5 Marking
Section 3 - Quality assessment procedures
3.1 Primary stage of manufacture
3.2 Structurally similar components
3.3 Subcontracting
3.4 Manufacturer's approval
3.5 Approval procedures
3.6 Procedures for capability approval
3.7 Procedures for qualification approval
3.8 Test procedures
3.9 Screening requirements
3.10 Rework and repair work
3.11 Certified test records
3.12 Delayed delivery
3.13 Release for delivery
3.14 Unchecked parameters
Section 4 - Test and measurement procedures
4.1 General
4.2 Alternative methods
4.3 Precision of measurement
4.4 Standard conditions for testing
4.5 Visual inspection
4.6 Dimensioning and gauging procedures
4.7 Electrical test procedures
4.7.1 Frequency and resonance resistance
4.7.2 Drive level dependency
4.7.3 Frequency and resonance resistance as a function
       of temperature
4.7.4 Unwanted responses
4.7.5 Shunt capacitance
4.7.6 Load resonance frequency and resistance
4.7.7 Frequency pulling range
4.7.8 Motional parameters
4.7.9 Insulation resistance
4.8 Mechanical and environmental test procedures
4.8.1 Robustness of terminations
4.8.2 Sealing tests
4.8.3 Soldering (Solderability and resistance to solder
       heat)
4.8.4 Rapid change of temperature, two-fluid-bath method
4.8.5 Rapid change of temperature with prescribed time
       of transition
4.8.6 Bump
4.8.7 Vibration
4.8.8 Shock
4.8.9 Free fall
4.8.10 Acceleration, steady state
4.8.11 Dry heat
4.8.12 Damp heat, cyclic
4.8.13 Cold
4.8.14 Climatic sequence
4.8.15 Damp heat steady state
4.8.16 Immersion in cleaning solvents
4.9 Endurance test procedure
4.9.1 Ageing
4.9.2 Extended ageing
4.9.3 Shelf life
Annex A. Drive level dependency

Describes test methods and general requirements for quartz crystal units of assessed quality, by either capability or qualification approval procedures.