I.S. EN 60444-4:1999
Current
The latest, up-to-date edition.
MEASUREMENT OF QUARTZ CRYSTAL UNIT PARAMETERS BY ZERO PHASE TECHNIQUE IN A PI-NETWORK - METHOD FOR THE MEASUREMENT OF THE LOAD RESONANCE RESISTANCE FL, LOAD RESONANCE RESISTANCE RL AND THE CALCULATION OF OTHER DERIVED VALUES OF QUARTZ CRYSTAL UNITS, UP TO 30 MHZ
12-01-2013
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
Dates of withdrawal of national standards are available from NSAI.
Committees responsible
National foreword
Method
1 Scope
2 Measuring circuit
3 Method of measurement
Appendix
A Recommendations regarding the use of load capacitors
Figures
A1 Typical load capacitor with carrier
A2 Method of insertion of load capacitor into pi-network
A3 Circuit diagram of pi-network including load
capacitor C1
A4 Load capacitance inaccuracy as a function of frequency,
for a load capacitance of 30 pF inclusive of calibration
inaccuracy and residual inductance effects (Worst case
situation)
A5 Relative measurement error of fL versus crystal
pulling sensitivity for various frequencies at a load
capacitance of 30 pF
A6 Relative measurement error of R1 versus frequency, for
various values of C1
A7 Relative measurement error of Cl as a function of
frequency
A8 Relative measurement error of C1 as a function of
C1 for various frequency measurement errors C0 =
5 pF; CL1 = 15 pF; CL2 = 30 pF
A9 Relative measurement error of C1 as a function of
C1 for various values of quality factor Q C0 = 3 pF;
CL1 = 15pF; CL2 = 30 pF
Annex ZA (normative) Normative references to international
publications with their corresponding European publications
Covers a simple method of measuring load resonance frequency. The method uses the change in resonance frequency which occurs when a load capacitance is inserted in series with the crystal unit.
| DevelopmentNote |
For CENELEC adoptions of IEC publications, please check www.iec.ch to be sure that you have any corrigenda that may apply. (01/2017)
|
| DocumentType |
Standard
|
| PublisherName |
National Standards Authority of Ireland
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| Status |
Current
|
| Standards | Relationship |
| NBN EN 60444-4 : 1997 | Identical |
| IEC TR 60444-4:1988 | Identical |
| BS EN 60444-4:1997 | Identical |
| SN EN 60444-4 : 1997 | Identical |
| NF EN 60444-4 : 2001 | Identical |
| DIN EN 60444-4:1997-10 | Identical |
| EN 60444-4:1997 | Identical |
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