Methods of testing concrete, Method 4.2: Determination of air content of freshly mixed concrete - Measuring reduction in air pressure in chamber above concrete
Electromagnetic compatibility (EMC) - Part 4-3: Testing and measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test (IEC 61000-4-3:2006+A1:2007+A2:2010, IDT)
Amendment 1 to Electromagnetic compatibility (EMC) - Part 4-30: Testing and measurement techniques - Power quality measurement methods (Adopted IEC 61000-4-30:2015, third edition, 2015-02)