IEC TS 62478:2016 is applicable to electromagnetic (HF/VHF/UHF) and acoustic measurements of PDs which occur in insulation of electrical apparatus. This specification deals with a large variety of applications, sensors of different frequency ranges and differing sensitivities. The tasks of PD location and measuring system calibration or sensitivity check are also taken into account. Key words: High Voltage Test Techniques, Partial Discharge, Electromagnetic, Acoustic.