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当然是在50度下测试冷态电阻啊# Z" }+ r: t/ l; l0 O$ n
8 R- V5 j! s. J, f" c9 Y" lc) The ambient temperature within the draught-proof enclosure shall be within the range of
& @$ U, E8 E: }8 X8 K" ?: u. t10 °C to 30 °C and should preferably be 25 °C. It shall not vary by more than ±1 °C during
( H1 z$ l; W- B0 i! t% B1 lmeasurements and during a preceding period long enough to affect the results. 5 x( }4 K( C- g) E
If, however, a lamp has temperature-sensitive electrical characteristics (e.g. a fluorescent
5 l! i g8 {8 ^/ u0 N& Klamp), or if the ta rating of the luminaire exceeds 30 °C, the ambient temperature within the 3 P8 @9 Q1 g8 c: S; R. f
draught-proof enclosure shall be within 5 °C of the ta rating and should preferably be the 7 A1 n- M) m( O; s$ M9 }$ k8 z
same as the ta rating. |
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