本試驗(yàn)裝置為桌上型, 合UL 2556標(biāo)準(zhǔn)要求。適用于檢測(cè)電線緣體和被覆體的啞鈴狀試片厚度。

測(cè)量范圍：0.01～10mm,小分度:0.01mm。（日本三豐百分表）

荷重砝碼：85&plun;3g

試樣測(cè)頭：ø6.4&plun;0.2mm

下 測(cè) 帖：2×9mm

大理石臺(tái)座：150×200mmm

試驗(yàn)方法

1、松開大理石臺(tái)座固定旋鈕，調(diào)整上下高度使百分表的指針指到位。

2、取啞鈴狀被測(cè)樣品，按下百分表的桿，將樣品放在6.4mm測(cè)頭

下，放下桿，直接讀取百分表的數(shù)值。即被測(cè)樣品的緣厚度。

UL 2556標(biāo)準(zhǔn)參考

4.2 Physical properties (ultimate elongation and tensile strength)

e) a dial micrometer having a 6.3 to 6.4 mm (0.248 to 0.252 in) diameter flat presser foot

exerting a total force of 0.83&plun;0.03 N (3.0&plun;0.1 ozf) on a rectangular anvil measuring

approximately 9 x 2 mm (0.35 x 0.08 in). The face of the anvil on the minor dimension shall be slightly convex. Alternatively, these measurements shall be made with a dead-weight dial micrometer having a presser foot 6.4&plun;0.2 mm(0.248&plun;0.010 in) in diameter and exerting a total of 85&plun;3 gf or 0.83&plun;0.03 N (3.0&plun;0.1 ozf) on the specimen – the load being applied by means of a weight. The presser foot shall be at least 2 mm (0.08 in) onto the edge of the specimen for each measurement. Micrometers shall have a resolution and accuracy of 0.01 mm (0.001 in);