API IP Spec 1583:2000 pdf download.SPECIFICATIONS AND QUALIFICATION PROCEDURES FOR AVIATION FUEL FILTER MONITORS WITH ABSORBENT TYPE ELEMENTS
2.2.4 Preparation for performance testing
2.2.4.1 Test vessel preparation The test vessel shall be examined to determine the condition of the internal surface finish and the uniformity and condition of any lining material used. 2.2.4.2 Test element preparation A full set of elements shall be critically examined before installation and any having visual defects shall be rejected and noted. A test element shall then be installed in the test vessel according to the manufacturer’s instructions, with a note being made of the ease of assembly, security of elements and sealing methods. The design shall be such as to minimise the possibility of mal-assembly. 2.2.4.3 Test fuel preparation The test fuel shall be cleaned by pumping it through the test rig, bypassing the test position but including the clay treaters and clean-up vessel (filter-water separators). Pumping shall be continued until all additives have been removed. A maximum conductivity of 10 pS/m will indicate that all anti-static additive has been removed. The fuel shall then be treated with the additive package listed in 4.1.4 in accordance with the procedure in 2.2.4.4. The test vessel shall then be slowly filled with fuel. Any leaks shall be noted and eliminated. During the filling operation there shall be no appreciable fuel flow out of the test vessel. The fuel shall be sampled from the test vessel feed sample point for fuel quality checks. The water separation character (by either IP 452 or ASTM D 3948) and the conductivity (IP 274 or ASTM D 2624) of the fuel shall be measured on samples taken before and after treatment.2.2.4.4 Additive additions Unless specified otherwise in 2.2.5, performance testing requires the addition of three additives to the test fuel. The additives are described in 4.1.4. Additive I shall be added to the fuel at a concentration of 1.0 mg/litre. The fuel shall be circulated through the test facility, bypassing the test vessel and other filtration until the system is stabilised; i.e. three successive conductivity measurements taken five minutes apart are within ±10 pS/m. Additive II shall be added to the test fuel at a concentration of 2.9 mg/litre with continued circulation of the fuel, bypassing the test unit and all other filtration until the system has again stabilised; i.e. three successive conductivity measurements are within ±10 pS/m. Additive III shall be added to the test fuel at a concentration of 0.4 mg/litre with continued circulation of the fuel, bypassing the test unit and all other filtration until the system has again stabilised; i.e. three successive conductivity measurements are within ±10 pS/m. No further addition of any of the above additives shall be made during any test run. Additives I, II and III may be added one after the other, but not as a fully blended concentrate. The fuel shall be circulated through the test facility, bypassing the test vessel and other filtration until the system is stabilised; i.e. three successive conductivity measurements taken five minutes apart are within ±10 pS/m. This will save time but witnesses should pay particular attention to the results of subsequent conductivity and water separation analyses.
API IP Spec 1583:2000 pdf download
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