6. Apparatus
6.1 Test Apparatus - The assembled apparatus consists of a tightly fitting cup and cover which contains a 75-µm (No. 200) sieve strainer for supporting the grease, a funnel for collecting separated oil, and a 20-mL beaker for retaining the separated oil. A fitting is provided in the cover for inlet air (1.72 kPa (0.25 psi)) and a hole is provided in the side of the cup to prevent back pressure. Fig. 1 is a photograph of a disassembled apparatus. The details of construction are given in Fig. 2. The 75-µm (No. 200) stainless steel sieve shall conform to the requirements of Specification E 11. The diameter of the 75 µm (No. 200) sieve shall be 104.8 mm (4 1/8 in.), completely clear with no solder showing.
6.2 Air Pressure Supply and Regulation - An air pressure supply, controlled by reducing valves or regulators, capable of maintaining air pressure at 1.72 6 0.07 kPa, should be used. A manometer, or other suitable pressure indicating device, and a pressure relief valve to protect against pressure surge should be included in the pressure system.
7. Reagents
7.1 Mineral Spirits, (Warning - Combustible. Vapor harmful.)
8. Sampling
8.1 The sample presented for analysis should be large enough to make possible the selection of a representative portion for testing.
8.2 Examine for any indication of non-homogeneity such as oil separation, phase changes or gross contamination. If any abnormal conditions are found, obtain a new sample.
