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|  DSH 390. `# u1 {, R G
8 C) X0 I: g9 O; _! m+ b
| Abnormal test
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| 60950(ed.2);am1-am4# J$ I$ t5 h6 j+ ^
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% N$ W" o( }8 Z8 bStandard:8 Q9 C2 h$ p8 E1 i0 p9 Z
IEC 60950 (1991) 2nd ed., Amdts.15 J% l4 p8 ~! O
(1992), 2 (1993), 3 (1995), 4 (1996)
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5.4.6' b. P2 X, a1 J: c) ^4 u# z! C
Sheet n. 390
. \ z a3 }7 y! p* ^' H3 b5 EPage 1(1)
, r6 ?/ \7 H5 P7 [Subject:2 y7 p. P h8 m4 l9 ?4 V5 n3 f
Abnormal test
' n1 |3 R. e# g' B; m, W1 A$ a, ~Key words:/ ?7 Y% o4 v" a3 H! B6 y% |
- Abnormal test
/ i" v! f* S; q) m3 W- Fault
1 X+ U) T" V2 o, z5 R' L$ WDecision confirmed
* e; z+ ]" D J4 }8 @5 E: zat CTL 38th meeting
$ G0 }; w8 ?7 _# L( hQuestion:8 M; B! p( n6 K5 y" `
If a printed wiring board mains trace opens during the performance of the component abnormal
' z8 w; P9 f/ ~, n" Z, V+ _test, should the test be terminated, should the trace be shorted and the test be continued until the
6 t3 p; ^4 ~, G+ m2 y: y, wultimate results are obtained, or should the test be repeated a total of three times?+ j) D; B* P+ Z: f+ T
Decision:1 V9 [. Y. j# U) s: v, n
For primary circuits, the trace should be shorted and the test continued until the ultimate results
1 r2 O6 {5 T) L- O4 E( m! h' o2 mare obtained, additional short circuiting applied as required. For secondary circuits, where the0 P9 a; M; N9 i% s- q4 T5 z
trace is designed to be opened in a repeatable manner, a second option is for the test to be
/ u1 Q! Q/ f* n, K; ?! b( L- Crepeated three times to determine the circuit opens repeatedly.
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