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我想问:1、如果5s内不能点燃,你们怎么判定?
/ V% y9 B3 f, W/ I 2、如果5s内点燃,燃烧3s后自熄,要不要计算燃烧速度,还是直接判为自熄,有何证据?% k* w9 _* c, y5 ~+ v3 y
3、如果3s内点燃,燃烧3s后自熄,要不要计算燃烧速度,还是直接判为自熄,有何证据?
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1、合格,不计算速度;
& D) B- h, R; g: w; M8 v4 C2、要计算燃烧速度,公式为:实际长度/(5S+3S),得到的值如大于0.1IN/S,则不合格2 H: Z# L0 S4 c6 M- C: D5 Y! k# |
3、要计算燃烧速度,公式为:实际长度/(3S+3S),得到的值如大于0.1IN/S,则不合格3 v% b; C/ k* Z5 o1 i* [ ?
请注意F963-08版本的燃烧时间计划与之前不一样,是从点火开始计时,总时间为60S,即为5S+55S,移开火焰后再只燃烧55S(对于会续燃的样品),$ V( z, U1 k7 P; I U. d) p, W
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A4.5.5 Remove the candle and allow the sample to burn for. R4 M8 p" J, Q0 z
an additional 55 s (total burn time including ignition time is 603 ~6 D! @/ ~, n; I
s) or until the flames reach the opposite end of the major axis. U- j# [- b: l
Determine the time of combustion by means of a stop watch.
1 d6 ~1 ]4 k+ w* IDo not allow the total test time to exceed 60 s with a8 s; m" Z; u+ ?4 H0 n' D
self-sustaining flame.
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以个意见希望有用! |
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