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13.2.1 Compliance is checked by the following test:
" J3 C" t9 f6 o5 [6 P5 z* X5 @The test is not made on parts of ceramic material or on insulation of wiring.) f, h6 U2 {6 C) i5 N7 l
The test shall be made in a heating cabinet having a temperature 25 °C ± 5 °C in excess of the
" M% ]5 W6 w0 y/ Moperating temperature of the relevant part determined during the temperature test (normal/ n4 C7 h# ~( }- `8 d
operation) of Section 12, with a minimum temperature of 125 °C when parts retaining currentcarrying: N& s7 r" `) r9 X8 O0 b0 n. o
parts or SELV parts in position are tested, and 75 °C for other parts.0 X& o- @/ |+ S+ a
The surface of the part to be tested shall be placed in the horizontal position and a steel ball of" W/ m K# A' X+ O' }
5 mm diameter pressed against this surface with a force of 20 N. A suitable apparatus for this% U5 c& Q. V% m" R
test is shown in Figure 10. If the surface under test bends, the part where the ball presses
9 G- Z% p$ S0 j- D6 l4 Zshould be supported.
( a8 O1 O) ]' y* F5 W/ \+ @1 ZAfter 1 h, the ball shall be removed from the sample, and the sample shall be cooled by$ Q1 o1 s$ s$ E, C' A# m, ?( Z1 `6 i
immersion in cold water for 10 s. The diameter of the impression shall be measured and shall
2 n5 A9 C; T0 b" V# _not exceed 2 mm. |
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发表于 2012-3-9 11:27
