ASTM D117 guide for sampling, test method and specification for insulating oil
ASTM D117 standard guide for sampling, test methods and specifications for electrical insulating oils of petroleum origin
SAMPLING
3. Sampling
3.1 Accurate sampling, whether of the complete contents or only parts thereof, is extremely important from the standpoint of evaluation of the quality of the product sampled. Obviously, careless sampling procedure or contamination in the sampling equipment will result in a sample that is not truly representative. This generally leads to erroneous conclusions concerning quality and incurs loss of the time, effort, and expense involved in securing, transporting, and testing the sample.
3.2 Sample the insulating oil in accordance with Practices D923, D2759, D3305, and D3613, as appropriate.
