Chronometric Terms; Frequency, Period
Edition 1971-07

Technical requirements and verification for clocks and clockmovements with electrical energy source; frequency of resonator ≤ 1000 Hz, terms of delivery for clock movements
Edition 1977-03

Chronometer; wrist-chronometer with frequency of oscillating system ≤ 1000 Hz, designation, requirements, testing
Edition 1980-10

Frequency Test Record St 33 and M 33 (33 1/3 rev/min; Stereo and Mono)
Edition 1971-03

Road transport and traffic telematics - Dedicated short-range communication - Physical layer using microwave at 5,8 GHz; English version EN 12253:2004
Edition 2005-11

Direct acting indicating analogue electrical measuring instruments and their accessories title - Part 4: Special requirements for frequency meters (IEC 60051-4:2018); German version EN IEC 60051-4:2021
Edition 2022-07

Measurement of quartz crystal unit parameters - Part 7: Measurement of activity and frequency dips of quartz crystal units (IEC 60444-7:2004); German version EN 60444-7:2004
Edition 2004-11

Semiconductor devices - Mechanical and climatic test methods - Part 12: Vibration, variable frequency (IEC 60749-12:2017); German version EN IEC 60749-12:2018
Edition 2018-07

Electromagnetic compatibility (EMC) - Part 4-28: Testing and measurement techniques - Variation of power frequency, immunity test for equipment with input current not exceeding 16 A per phase (IEC 61000-4-28:1999 + A1:2001 + A2:2009); German version EN 61000-4-28:2000 + A1:2004 + A2:2009
Edition 2009-12

Piezoelectric devices - Preparation of outline drawings of surface-mounted devices (SMD) for frequency control and selection - General rules (IEC 61240:2016); German version EN 61240:2017)
Edition 2017-08