本試驗裝置為桌上型, 符合UL 2556標準要求。適用于檢測電線絕緣體和被覆體的啞鈴狀試片厚度。

測量范圍：0.01～10mm,最小分度:0.01mm。（日本三豐百分表）

荷重砝碼：85±3g

試樣測頭：ø6.4±0.2mm

下 測 帖：2×9mm

大理石臺座：100×150mmm

UL 2556標準參考

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 ±0.03 N (3.0 ±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 ±0.2 mm (0.248 ±0.010 in) in diameter and exerting a total of 85 ±3 gf or 0.83 ±0.03 N (3.0 ±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);