BS EN 60384-18:2009 pdf download

BS EN 60384-18:2009 pdf download.Fixed capacitors for use in electronic equipment一 Part 18: Sectional specification 一Fixed aluminium electrolytic surface mount capacitors with solid (Mn02) and non-solid electrolyte.
The sample shall consist of specimens having the lowest and highest voltages and for these voltages the smallest and largest case size. When there are more than four case sizes, an intermediate case size shall also be tested. In each of these case siz&voltage combinations (values), the highest capacitance shall be chosen, Thus, for the approval of a range. testing is required of either four or six values, When the range consists of less than four values, the number of specimens to be tested shall be that required for four values.
Spare specimens are permitted as foflows:
a) one per value which may be used to replace the permitted nonconforming item in Group 0; b) one per value which may be used as replacements for specimens which are nonconforming
because of incidents not attributable to the manufacturer.
The numbers given In Group 0 assume that all groups are applicable. If this ss 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 permissible number of non-conforming items for qualification approval tests.
3.4,2 Tests
The complete series of tests specified in Tables 2 and 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.
Specimens found to be nonconforming during the tests of Group 0 shall not be used for the other groups.
One nonconforming tem is counted when a capacitor has not satisfied the whole or part of the tests of a group.
The approval is granted when the number of nonconforming items does not exceed the specified number of permissible nonconforming items for each group or subgroup and the total number of permissible nonconforming Items.
NOTE Tables 2 and 3 together form itt. fixed sample sze test schedule. for eftich Table 2 includes the details for the sampling and permissible nonconfming items (or th, different eats or groups of tests, whereas Table 3, togemer with the details of tests contained in Clause 4, gives a complete summary of test conditions and performance requirements and indicates where, for example, for tite test method or conditions of test, a choice is made m the detail specification.
Th, conditions of test end performance requirements For the fixed sample siz, test schedul. should be identical to those prescribed in the detail specification (or quality conformance inspection.
3.5 Quality Conformance Inspection
3.5.1 Formation of inspection lots
a) Groups A and B inspection
These tests shall be carried out on a lot.by-ioE oasis.
A manufacturer may aggregate the current production into inspection lots subject to the following safeguards:
1) the inspection lot shall consist of structurally similar capacitors (see 3.2):
2a) the sample tested shall be representative 01 the values and dimensions contained in the inspection lot:
— in relation to their number;
— with a minimum of five of any one value:
2b) if there are less than five of any one value In the sample the basis for the drawing of samples shall be agreed between the manufacturer and the national supervising inspectorate.
b) Group C inspection
These lests shall be carried out on a periodic basis.
Samples shall be representative of the current production of the specified periods and shall be divided into high, medium and low voltage ratings. In order to cover the range of approvals in any period, one case size shall be tested from each voltage group. In subsequent periods, other case sizes and/or voltage ratings in production shall be tested with the aim of covering the whole range.
3.5.2 Test schedule
The schedule for the lot.by-lot and periodic tests for Ouahty Conformance Inspection Is given in Table 4 of the blank detail specification, IEC 60384.18.1 or IEC 60384.18.2. as applicable.
3.5.3 Delayed delivery
When, according to the procedures of 3.10 of IEC 60364-1, re-inspection has to be made. solderability and capacitance shall be checked as specified in Groups A and B inspection.
3.5.4 Assessment levels
The assessment level(s) given in the blank detail specification shall preferably be selected from Tables 4 and 5.