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本帖最后由 CHENGFEGO 于 2013-12-19 16:09 编辑 1 T5 e, J' v! A Z) `1 e, t
lengchuan000 发表于 2013-12-19 15:48
+ ~* k5 ~( A9 r$ u1 O0 m请教一下UL什么要求
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* \# M: R& k, e8 t3 [a dial micrometer having a 6.3 to 6.4 mm (0.248 to 0.252 in) diameter flat presser foot3 ~' f- \2 `+ ?9 c7 d& t+ ^, D3 ~
exerting a total force of 0.83 ±0.03 N (3.0 ±0.1 ozf) on a rectangular anvil measuring
. ?, d6 c. b. Y2 d1 P* A T6 aapproximately 9 x 2 mm (0.35 x 0.08 in). The face of the anvil on the minor dimension shall be
1 ?5 n8 \5 A/ y1 l% Y1 c0 K' [slightly convex. Alternatively, these measurements shall be made with a dead-weight dial. v& y1 k1 \# m2 k! n$ ~* y
micrometer having a presser foot 6.4 ±0.2 mm (0.248 ±0.010 in) in diameter and exerting a total( Q& T2 P8 P1 I, O6 G8 g
of 85 ±3 gf or 0.83 ±0.03 N (3.0 ±0.1 ozf) on the specimen – the load being applied by means3 {) e3 A6 r. v0 I+ S" n
of a weight. The presser foot shall be at least 2 mm (0.08 in) onto the edge of the specimen for( k" X }' p% z& ^' N U+ S. E
each measurement. Micrometers shall have a resolution and accuracy of 0.01 mm (0.001 in);
7 P6 M1 i4 F/ k9 y$ Jf) a micrometer with a resolution and accuracy of 0.001 mm (0.0001 in);1 E+ z: c& W1 }: v$ T( i
就是UL用來測量啞鈴片厚度的,
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