EN10160--德国超声检验规程(9)

调校仪器主要是定义时基线、功率和放大（倍数）。

The time base is adjusted to a value at which the distance, on the oscilloscope screen, between the emission echo and back-wall echo is sufficient to allow a defect echo to be clearly detected between them.

时基线的调校是为了确定发射波和背面回声间在示波器屏幕上显示的时差，以便使它们与缺陷回声清楚地区分开来而准确发现缺陷。

At least, two back-wall echoes should be displayed. 最起码，两个背面的回声应从示波器屏幕上显示出来。 The power and amplification are adjusted in conjunction on a sound area which does not give any discontinuity echo. The first back-wall echo shall then be brought up to the maximum amplitude compatible with the height of the screen in the field of Linearity of the apparatus (generally between 80 % and 100 % full screen height).

功率和放大（倍数）的调校需要一个没有任何裂纹（缺陷）回声的区域。第一个背面回声应在仪器的线性区域内达到与屏幕高度相匹配的最大振幅（一般在屏幕高度的80 ％和100 ％之间）。

The system shall be checked at least once every 8 h. 每工作8小时，至少要检查一次系统。

7 Coupling conditions - Surface condition of the flat product

第七章 耦合状态——钢板表面条件

The coupling medium shall ensure an adequate contact between the probe and the surface of the flat product. Water is normally used but other coupling media (e.g. oil, paste) may be used at the discretion of the supplier. 耦合剂应确保探头和钢板表面的充分接触。通常采用清水但也可以使用供货商推荐的其它的介质（例如油、糊状物等）。

The surface condition shall permit at least two successive back-wall echoes to be distinguished when the probe is placed on any area free from internal discontinuities. The flat products are normally examined without any special preparation of the surface.

（钢板）的表面应至少能使其成为可能：把探头放在没有内部裂纹（缺陷）的任一区域，能够分辨出来来自两个背面的回声。

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