CENELEC
Project
| Reference | EN 60444-4:1997 |
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| Title | Measurement of quartz crystal unit parameters by zero phase technique in a pi-network - Part 4: Method for the measurement of the load resonance frequency fL, load resonance resistance RL and the calculation of other derived values of quartz crystal units, up to 30 MHz |
| Project Number | 6932 |
| Abstract/Scope | Specifies 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. |
| Status |
Published
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Status
| Current Stage code | 6060 |
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| Current Stage code date | 1997-04-17 |
| Current Stage code deadline | 1997-12-01 |
| Deadline date for vote |
Legal
| Directive(s) | |
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Details
| IEC Technical Body | IEC/TC 49 |
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| Reference Document | IEC/TR 60444-4:1988 (EQV) |
| ICS | 31.140 - Piezoelectric and dielectric devices |
| Keywords | Quartz crystal unit; Pi-network; Load resonance; Measurement |
| Note | D114/118: CLC/TC 49 disbanded |
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Environment
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Clause
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Categories - Aspects
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Product Life Cycle
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Information
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History
Implementation Dates
| date of Ratification (DOR) (1) | 1997-03-11 |
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| date of Availability (DAV) (2) | 1997-04-17 |
| date of Announcement (DOA) (3) | 1997-06-01 |
| date of Publication (DOP) (4) | 1997-12-01 |
| date of Withdrawal (DOW) (5) | 1997-12-01 |
Relations
| Supersedes | |
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| Superseded by | |
| Normative reference (6) | IEC 60122-1:1976 IEC 60122-2:1983 IEC 60302:1969 EN 60444-1:1997 EN 60444-2:1997 |
(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved
(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat
(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level
(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement
(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn
(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.
