The hard-drive method and basic application of the L.A.

I, the rationale:

Expression method:

Test force:

Two., The sample requires:

1.Type of general material

2.Hard-quality alloy (Full)HRA♪ The diamond's on top of the ruler ♪：

3.Surface L.A.:

Three, ruler selection:

1Ruler, head and force values and range of use

2, the hardness range of different rulers

3, the ruler selection corresponds to the thickness

IV. Spacing (location):

1，   1Normal L.O.: the pressure marks are not less than4The gravitational diameter is not less than2mm, the distance between the point and the edge is not less than2.5The gravitational diameter is not less than1mm。

2，   Hard-quality alloy: pressure marks are not less than1.5mmMultiplier marks diagonal length, with a margin of less than1.5mm。

3，   Surface L.A.: Pressure marks are not less than3Double-pressure marks in diameter, with a margin of less than2.5Double-pressure mark diameter.

4，   Plastic Roth: the space between the pressure marks and the edges is not less than10mm。

V: Allowed range of error:

Six, Sphere and Cylinder Test:

Sphere and cylindrical tests require correction of the hardness values, which can be measured by calculating the cam-side diameter and the warp radius. Touch screen perusals generally test requires the entry of a round radius in the upper curvature radius column of the interface, and automatic compensation in the hardness test.

Seven, plastic roach test:

1，   Ball-pressure hard measure

Ruler Selection:

The sample requires:

Allow error:No less than test points10individual,Signature Error8HRepeated error12H

2，   Common plastics, Roths.

Ruler Selection:

The sample requires:

Allow error (reference):

HRR:Icon Error≦1.2HR，     Repeated error≦1.5HR；

HRL:Icon Error≦1.2HR，       Repeated error≦1.5HR；

HRM:Icon Error≦1.5HR，     Repeated error≦2.0HR；

HRE: Logical error≦2.0HR,     Repeated error≦2.5HR；