BS 60384-26:2010 pdf download – Fixed capacitors for use in electronic equipment Part 26: Sectional specification — Fixed aluminium electrolytic capacitors with conductive polymer solid electrolyte
2.2.5 Rated temperature The value of the rated temperature shall be upper category temperature. 3 Quality assessment procedures
3.1 Primary stage of manufacture The primary stage of manufacture is the capacitor manufacturer’s evaluation of the formed anode foil.
3.2 Structurally similar components Capacitors considered as being structurally similar are capacitors produced with similar processes and materials, though they may be of different case sizes and values. 3.3 Declaration of conformity (basic requirements)
3.4 Test schedule and requirement for initial assessment (mandatory and optional tests) The procedures for qualification approval testing are given in IEC 60384-1 The schedule to be used for Qualification Approval testing on the basis of lot-by-lot and periodic tests is given in 3.5 of this specification. The procedure using a fixed sample size schedule is given in 3.4.1 and 3.4.2 below.
3.4.1 Qualification approval on the basis of the fixed sample size procedures sampling The fixed sample size procedure is described in Q.5.3, b) of IEC 60384-1 . The sample shall be representative of the range of capacitors for which approval is sought. This may or may not be the complete range covered by the detail specification. The sample shall consist of specimens of capacitors of maximum and minimum size and for each of these sizes the maximum capacitance value for the highest rated voltage and minimum rated voltage of the voltage ranges for which approval is sought. When there are more than four rated voltages, an intermediate voltage shall also be tested. Thus for the approval of a range, testing is required of either four or six values (capacitance/voltage combinations) for each temperature characteristic. Where the total range consists of less than four values, the number of specimens to be tested shall be that required for four values. In case assessment level EZ is used, spare specimens are permitted as follows: Two (for 6 values) or three (for 4 values) per value which may be used as replacements for specimens, which are non-conforming because of incidents not attributable to the manufacturer. The numbers given in Group 0 assume that all groups are applicable. If this is not so the numbers may be reduced accordingly. When additional groups are introduced into the qualification approval test schedule, the number of specimens required for Group 0 shall be increased by the same number as that required for the additional groups. Table 2 gives the number of samples to be tested in each group or subgroup together with the number of permissible non-conformances for qualification approval test.
3.4.2 Tests
The complete series of tests specified in Table 2 and Table 3 are required for the approval of capacitors covered by one detail specification. The tests of each group shall be carried out in the order given. The whole sample shall be subjected to the tests of Group 0 and then divided for the other groups. Non-conforming (Table 2) specimens found during the tests of Group 0 shall not be used for the other groups. ―One non-conforming item‖ is counted when a capacitor has not satisfied the whole or a part of the tests of a group.
The approval is granted when the number or non-conforming items do not exceed the specified number of permissible non-conforming items for each group or subgroup and the total number of permissible non-conformances. NOTE Table 2 and Table 3 together form the fixed sample size test schedule. Table 2 includes the details for the sampling and permissible non-conforming items for the different tests or groups of tests. Table 3 together with the details of the test contained in Clause 4 gives a complete summary of test conditions and performance requirements and indicates where, for example for the test method or conditions of test, a choice has to be made in detail specification. The conditions of test and performance requirements for the fixed sample size test schedule shall be identical to those prescribed in the detail specification for quality conformance inspection.