Home > Classroom

  • IEC 61125 Insulating liquids - Test methods for oxidation stability - Test metho IEC 61125 Insulating liquids - Test methods for oxidation stability - Test method for evaluating the oxidation stability of insulating liquids in the delivered state4 Apparatus4.1 General principle of the methodThe liquid sample to be tested, through which a stream of air is bubbled, is maintained for ...
  • IEC 61125 Insulating liquids - Test methods for oxidation stability - Test metho IEC 61125 Insulating liquids - Test methods for oxidation stability - Test method for evaluating the oxidation stability of insulating liquids in the delivered state1 ScopeThis document describes a test method for evaluating the oxidation stability of insulating liquids in the delivered state under accelerated ...
  • IEC 60970 Insulating liquids - Methods for counting and sizing particles IEC 60970 Insulating liquids - Methods for counting and sizing particles10 Method B - Optical microscopy10.1 PrincipleA known volume of insulating liquid is filtered under vacuum conditions through a membrane filter to collect contaminants on the filter surface. The membrane is then mounted between glass ...
  • IEC 60970 Insulating liquids - Methods for counting and sizing particles IEC 60970 Insulating liquids - Methods for counting and sizing particles9 Method A - Automatic particle size analyzer9.1 Summary of methodThe sample is agitated to suspend the particles, then passed at an optimum flow rate through the sensor unit of the particle counter. After the required fluid volume ...
  • IEC 60970 Insulating liquids - Methods for counting and sizing particles IEC 60970 Insulating liquids - Methods for counting and sizing particles7 Sampling7.1 General remarksThe sample taken should only be used for the particle count determination. Further analysis may be done on the residual sample, but after the particle count determination.The particle content of a sample ...
  • IEC 60970 Insulating liquids - Methods for counting and sizing particles IEC 60970 Insulating liquids - Methods for counting and sizing particles5 Comparison and limitation of the methodsAutomatic particle counters using the light interruption principle are quick and easy to use, but the following points should be borne in mind:- With some liquids it may be necessary to modify ...
  • IEC 60970 Insulating liquids - Methods for counting and sizing particles IEC 60970 Insulating liquids - Methods for counting and sizing particles3 General caution, health, safety and environmental protectionThis International Standard does not purport to address all the safety problems associated with its use. It is the responsibility of the user of the standard to establish ...
  • IEC 60970 Insulating liquids - Methods for counting and sizing particles IEC 60970 Insulating liquids - Methods for counting and sizing particles1 ScopeThis standard describes the sampling procedures and methods for the determination of particle concentration and size distribution.Three methods are specified. One uses an automatic particle size analyser, working on the light ...
  • ASTM D4950 Standard Classification and Specification for Automotive Service Grea ASTM D4950 Standard Classification and Specification for Automotive Service Greases4. Performance Classification4.1 Automotive service greases are classified into two general groups. Those designated with an "L" prefix (chassis greases) are intended for the service lubrication of ball joints, steering ...
  • ASTM D4950 Standard Classification and Specification for Automotive Service Grea ASTM D4950 Standard Classification and Specification for Automotive Service Greases1. Scope1.1 This specification covers lubricating greases suitable for the periodic relubrication of chassis systems and wheel bearings of passenger cars, trucks, and other vehicles.1.2 This specification defines the requirements ...