Natural stone test methods - Determination of the dynamic modulus of elasticity (by measuring the fundamental resonance frequency); German version EN 14146:2004
Edition 2004-06

Measurement of quartz crystal unit parameters by zero phase technique in a π-network - Part 1: Basic method for the measurement of resonance frequency and resonance resistance of quartz crystal units by zero phase technique in a π-network (IEC 60444-1:1986 + A1:1999); German version EN 60444-1:1997 + A1:1999
Edition 2000-09

Natural stone test methods - Determination of the dynamic modulus of elasticity (by measuring the fundamental resonance frequency)
Edition 2004-10

Natural stone test methods - Determination of the dynamic modulus of elasticity (by measuring the fundamental resonance frequency)
Edition 2004-06-01

Measurement of quartz crystal unit parameters by zero phase technique in a pi-network. Part 1: Basic method for the measurement of resonance frequency and resonance resistance of quartz crystal units by zero phase technique in a pi-network
Edition 1997-04

Measurement of quartz crystal unit parameters by zero phase technique in a pi-network - Part 1: Basic method for the measurement of resonance frequency and resonance resistance of quartz crystal units by zero phase technique in a pi-network (IEC 60444-1:1986+A1:1999)
Edition 2001-01-01

Natural stone test methods - Determination of the dynamic elastic modulus of elasticity (by measuring the fundamental resonance frequency)
Edition 2004-04-27

Natural stone test methods - Determination of the dynamic modulus of elasticity (by measuring the fundamental resonance frequency)
Edition 2004-08-01

Evaluation method for the resonance frequency of the multi-copter UA (unmanned aircraft) by measurement of rotor and body frequencies
Edition 2023-07

Measurement of quartz crystal unit parameters by zero phase technique in a pi-network - Part 1: basic method for the measurement of resonance frequency and resonance resistance of quartz crystal units by zero phase technique in a pi-network
Edition 2000-06-01