BS 5737:1979

National foreword
Cooperating organizations
1 Scope
2 Definitions
3 General considerations
4 Apparatus
5 Cleaning solvents
6 Cleaning the test cell
7 Sampling
8 Conditioning and preparation of specimens
9 Filling the test cell
10 Test temperature
11 Measurement of dissipation factor
12 Measurement of relative permittivity
13 Measurement of d.c. resistivity
Appendix
A Alternative procedures for routine testing of
    dielectric dissipation factor and resistivity of
    insulating liquids
Figures
1 Example of a three-terminal cell for measurements on
    liquids
1a Example of screening for the cell of Figure 1
2 Example of a two-terminal cell for measurements on
    liquids

Reference tests for determining the principal electrical characteristics of hydrocarbon insulating oils and askarels (applicable to unused oils and oils in service). Also gives simplified procedure for routine testing.