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13.2.1 Compliance is checked by the following test:0 g) `5 Z9 E& o6 A- ~
The test is not made on parts of ceramic material or on insulation of wiring., {6 k5 T0 U/ R6 b3 j, Y
The test shall be made in a heating cabinet having a temperature 25 °C ± 5 °C in excess of the
2 c% x: Q% H) qoperating temperature of the relevant part determined during the temperature test (normal
9 A" ]. k( ^- B/ Z4 Q) h: Doperation) of Section 12, with a minimum temperature of 125 °C when parts retaining currentcarrying' L* }8 c" ^- u+ i
parts or SELV parts in position are tested, and 75 °C for other parts.
6 m2 m! I! C7 [5 } `" s: iThe surface of the part to be tested shall be placed in the horizontal position and a steel ball of, v, N1 { K- v6 T5 L3 u
5 mm diameter pressed against this surface with a force of 20 N. A suitable apparatus for this' n) P( ~# l- h
test is shown in Figure 10. If the surface under test bends, the part where the ball presses
# q; M. q2 s) c" h6 y- k, x$ @should be supported., L; W4 T6 ^8 Y8 W% }( p% `7 d
After 1 h, the ball shall be removed from the sample, and the sample shall be cooled by
' B$ D9 H2 e9 E# yimmersion in cold water for 10 s. The diameter of the impression shall be measured and shall6 u: h! u' p% i6 Z/ q- u2 V( P
not exceed 2 mm. |
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发表于 2012-3-9 11:27
