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|  DSH 4740 Y# d8 m5 h" c+ O
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| General conditions for the tests
6 a/ D0 d$ d2 J, g7 {$ p6 A | 4.12- d2 r; W4 Y, C* M+ b
| 60335-1(ed.3)
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Standard: IEC 60335-1:1991, 3rd Ed." L* t, C9 U$ y& x! J
Sub clause: 4.12( W/ d* X8 c) v8 J, d5 m1 g' D
Sheet No. DSH-474
$ U- K z$ l$ H8 @' p1 y' bSubject: General conditions for the tests
9 r& Q( l; [5 Z9 SKey words: - supply voltage% o4 B8 r, F5 ~$ t: u' V
Decision taken at the 40th CTL meeting 2003. q ^1 R7 l8 t- r1 g: y
Question:
# D/ U6 R% }7 e K( E) J6 u9 ~In the case of heating elements without appreciable positive temperature coefficient of7 M7 a3 x# M4 G8 Y
resistance, should the supply voltage be adjusted during performance of the test?
|5 E4 m- N4 ~" ^& K6 ~Rationale:7 r5 e. g4 m* \+ ~& x
See question.9 I5 x* T, c* w; I
Decision:/ e' Y3 Z' B8 m, Q, D% P6 _! P
The voltage shall be continuously adjusted to obtain the intended input., l' l% N1 m9 B0 ?2 g
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发表于 2012-9-12 12:46
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