Partial discharge measurements performed according to IEC 60270 has become an essential tool for the quality assurance of HV equipment. The main goal of IEC 60270 is to standardize and unify PD measurements to get comparable results for tests performed at various locations, using different equipment and by different operators. This paper aims at providing clear and unambiguous guidelines on how to perform repeatable and comparable PD measurements in compliance with one of the most popular international testing standards in Europe, the IEC 60270. This paper also discusses the functionality of the various components in the measuring setup. In addition, it makes some invaluable recommendations based on scientific knowledge regarding the selection of proper PD test and evaluation parameters to ensure correctness of obtained test results. The main focus is on the selection of a suitable frequency measurement range, which is a key step in the quasi-integration process involved in the charge estimation of the PD pulse.@en