lengchuan000 发表于 2013-12-19 15:48 + q; T$ k& I/ w) q& m: u! C. i
请教一下UL什么要求
- ^% b& L% ]! O" u : I( b6 A/ A2 P1 w1 Aa dial micrometer having a 6.3 to 6.4 mm (0.248 to 0.252 in) diameter flat presser foot6 x' [( z) l% s% W
exerting a total force of 0.83 ±0.03 N (3.0 ±0.1 ozf) on a rectangular anvil measuring & ?2 p- }9 a! m" E: rapproximately 9 x 2 mm (0.35 x 0.08 in). The face of the anvil on the minor dimension shall be : A9 ?+ {9 f6 r/ H3 x, v( x/ C1 l0 @slightly convex. Alternatively, these measurements shall be made with a dead-weight dial 2 ?% J4 W8 [$ e0 Qmicrometer having a presser foot 6.4 ±0.2 mm (0.248 ±0.010 in) in diameter and exerting a total ) B3 l% L2 o2 f5 ]8 n8 x, Yof 85 ±3 gf or 0.83 ±0.03 N (3.0 ±0.1 ozf) on the specimen – the load being applied by means # s0 c0 u( K7 E2 l6 n& X, \ P% C7 xof a weight. The presser foot shall be at least 2 mm (0.08 in) onto the edge of the specimen for' v) Q; P5 ]' O, G- \$ e4 {( \
each measurement. Micrometers shall have a resolution and accuracy of 0.01 mm (0.001 in); ' l8 ^8 @, K% j, g0 Qf) a micrometer with a resolution and accuracy of 0.001 mm (0.0001 in);0 S# F2 F, C [1 b- O' Y
就是UL用來測量啞鈴片厚度的, 4 f( {, \1 V/ M8 X作者: lengchuan000 时间: 2013-12-19 16:46
CHENGFEGO 发表于 2013-12-19 16:02 $ t! }) H) \! F$ Y5 u, a8 B' fa dial micrometer having a 6.3 to 6.4 mm (0.248 to 0.252 in) diameter flat presser foot 0 ]& h, Q3 g/ r" wexertin ...