From Diesel Testing
Identifies volumetric energy of the diesel. The more density in diesel means, the more volumetric energy it possesses. It is measured at 15°C and is also known as specific gravity.
Color identifies actual color of the diesel while it was produced. This color should be standard color as specified by the standardization authority. Odd color means either diesel is out-dated or mixed with impurities.
It is a physical characteristic of diesel where a test is conducted to check at what lowest temperature the diesel starts vaporizing. Of course there is a standard temperature made for the quality of diesel.
Sulphur or Sulfur content means the amount of sulphur present in the diesel. It should be maintained with the standard value because higher sulphur values in diesel caused harmful effect to environment.
This test identifies the amount of water in diesel. There is a minimum and maximum standard for water content in diesel which we need to follow otherwise it harms.