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13.2.1 Compliance is checked by the following test:: C( G b" C1 h' c
The test is not made on parts of ceramic material or on insulation of wiring.
2 o2 A! |3 q: L8 a% m4 qThe test shall be made in a heating cabinet having a temperature 25 °C ± 5 °C in excess of the$ l; T% i& q1 M3 `+ X, o: i
operating temperature of the relevant part determined during the temperature test (normal; x! E P4 p: y9 t1 p! _$ j
operation) of Section 12, with a minimum temperature of 125 °C when parts retaining currentcarrying0 n; W5 z" P b3 L
parts or SELV parts in position are tested, and 75 °C for other parts.8 j- Y) }* F. ~) \: w
The surface of the part to be tested shall be placed in the horizontal position and a steel ball of; j' s% y ~2 R8 ^
5 mm diameter pressed against this surface with a force of 20 N. A suitable apparatus for this
- k; a2 A" D: ~, btest is shown in Figure 10. If the surface under test bends, the part where the ball presses
+ L' L9 P8 P* W5 _4 ~) H5 qshould be supported.8 h% o d0 ~9 v* [# ~
After 1 h, the ball shall be removed from the sample, and the sample shall be cooled by2 A. j: F! `! `" y
immersion in cold water for 10 s. The diameter of the impression shall be measured and shall
0 `$ n6 f' l" Wnot exceed 2 mm. |
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发表于 2012-3-9 11:27
