-
IEC 62021-2 Insulating liquids - Determination of acidity - Part 2: Colourimetri
IEC 62021-2 Insulating liquids - Determination of acidity - Part 2: Colourimetric titration1 ScopeThis part of IEC 62021 describes a procedure for determination of the acidity of unused and used electrical mineral insulating oils.NOTE 1 In unused and used mineral insulating oils, the constituents that ...
-
IEC 62021-1 Insulating liquids - Determination of acidity - Part 1: Automatic po
IEC 62021-1 Insulating liquids - Determination of acidity - Part 1: Automatic potentiometric titration11 CalculationCalculate the acidity to the nearest 0,01, expressed as mg KOH/g of oil using the following equation:whereV1 is the volume of alcoholic KOH solution (see 5.2) used to titrate the test portion, ...
-
IEC 62021-1 Insulating liquids - Determination of acidity - Part 1: Automatic po
IEC 62021-1 Insulating liquids - Determination of acidity - Part 1: Automatic potentiometric titration10 ProcedureSet up the apparatus in accordance with the manufacturer's instructions.Rinse and fill the burette with 0,05 mol/l (or 0,1 mol/l as in 5.2) alcoholic potassium hydroxide solution (see 5.2).Standardize ...
-
IEC 62021-1 Insulating liquids - Determination of acidity - Part 1: Automatic po
IEC 62021-1 Insulating liquids - Determination of acidity - Part 1: Automatic potentiometric titration8 Preparation and maintenance of electrode systemAlthough electrodes are not particularly fragile they should be handled carefully at all times.8.1 PreparationRinse the electrodes with 2-propanol and ...
-
IEC 62021-1 Insulating liquids - Determination of acidity - Part 1: Automatic po
IEC 62021-1 Insulating liquids - Determination of acidity - Part 1: Automatic potentiometric titration5 Reagents and auxiliary products5.1 ReagentsOnly reagents of recognized analytical grade and de-ionized water or water of equivalent purity shall be used.5.2 Titration reagentStandard volumetric alcoholic ...
-
IEC 62021-1 Insulating liquids - Determination of acidity - Part 1: Automatic po
IEC 62021-1 Insulating liquids - Determination of acidity - Part 1: Automatic potentiometric titration1 ScopeThis part of IEC 62021 describes the procedure for the determination of the acidity of unused and used electrical mineral insulating oils.NOTE 1 In unused and used mineral insulating oils, the ...
-
IEC 61868 Mineral insulating oils - Determination of kinematic viscosity at very
IEC 61868 Mineral insulating oils - Determination of kinematic viscosity at very low temperatures8 Expression of results8.1 Calculation8.1.1 Calculate the kinematic viscosity ν from the measured flow time t and the instrument constant C by means of the following equation.ν = C x twhereν is the kinematic ...
-
IEC 61868 Mineral insulating oils - Determination of kinematic viscosity at very
IEC 61868 Mineral insulating oils - Determination of kinematic viscosity at very low temperatures7 Procedure7.1 The specific details of operation vary for the different types of viscometers listed in ISO 3104. In all cases, however, proceed in accordance with 7.2 to 7.4 inclusive.7.2 Maintain the bath ...
-
IEC 61868 Mineral insulating oils - Determination of kinematic viscosity at very
IEC 61868 Mineral insulating oils - Determination of kinematic viscosity at very low temperatures5 Apparatus5.1 ViscometersViscometers of the glass capillary type, calibrated and capable of measuring kinematic viscosity within the limits of precision given in 8.2, are acceptable (see note 1). The viscometers ...
-
IEC 61868 Mineral insulating oils - Determination of kinematic viscosity at very
IEC 61868 Mineral insulating oils - Determination of kinematic viscosity at very low temperatures1 ScopeThis International Standard specifies a procedure for the determination of the kinematic viscosity of mineral insulating oils, both transparent and opaque, at very low temperatures, after a cold soaking ...
