標準號：SIS SS IEC 814-1986
中文標準名稱：絕緣油．自動電量計coulometric卡氏滴定法判斷絕緣液體中水含量
英文標準名稱：Insulating oils - Determination of water in insulating liquids by automatic coulometric Karl Fischer titration
發布日期：1986/12/25 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：This standard describes a method for the determination of water in unused or used insulating liquids with coulometrically generated Karl Fischer reagent. The method is applicable to water concentrations of 2 mg/kg to 100 mg/kg. The precision data given in Clause 10 apply only to new oils with viscosity less than 20 mm2/s at 40 °C (see note).Appendix A contains two suitable methods for preparing the reagents which may be useful in countries where it is difficult to buy prepared reagents.This method should be supplementary to the classical Karl Fischer titration as described inI E C Publication 733: Determination of Water in Insulating Oils, and in Oil-impregnatedPaper and Pressboard, and in case of dispute this latter method shall be used as a referencefor arbitration.Note. — For liquids in service, the accuracy of the method may be affected by the presence of contaminants and degradation products.