IEC TR 61946:2007 pdfダウンロード。Mineral insulating oils – Characterization of paraffinic/naphthenic nature – Low temperature differential scanning calorimetry (DSC) test method 1 Scope This technical report offers a test method for the classification of mineral insulating oils as either paraffinic or naphthenic, by means of low-temperature differential scanning calorimetry (DSC). For the purpose of this technical report, the typical operating temperature range extends from –1 00 °C to +1 00 °C. The temperature range can be extended, depending upon the instrumentation used. The method is applicable to mineral insulating oils obtained from petroleum crudes. It may be also applied to mineral...