BS EN ISO 148-2:2016涵盖了摆锤式冲击试验机在性能方面的验证 结构元素、它们的整体性能以及它们产生的结果的准确性。它是 适用于带有2mm或8mm撞击杆的机器，用于进行摆锤冲击试验，例如 例如，根据ISO 148-1。它可以应用于各种容量和不同设计的摆锤冲击试验机。用于工业、普通或研究实验室测试金属材料的冲击机 根据ISO 148的这一部分，这些机器被称为工业机器。那些要求更严格的 需求被称为参考机器。参考文献验证规范 机器见ISO 148-3。ISO 148的这一部分描述了两种验证方法。直接法本质上是静态的，涉及到对系统关键部分的测量 确保机器符合ISO 148本部分的要求。用于测试的仪器 验证和校准可追溯至国家或国际标准。 间接法本质上是动态的，它使用参考试件来验证试验台上的点 吸收能量的测量刻度。参考试样的要求见 ISO 148-3。摆锤冲击试验机在安装之前不符合ISO 148的本部分要求 通过直接和间接方法进行验证，并符合第6条和第7条的要求。ISO 148的这一部分描述了如何评估吸收的总能量的不同组成部分 破坏一个试件。该总吸收能量包括断裂试样本身所需的能量，以及执行前半个循环的摆锤冲击试验机的内部能量损失 从初始位置摆动。注:内能损失是由以下因素造成的:空气阻力、旋转轴轴承的摩擦和摆锤指示指针的摩擦 可通过直接法测定（见6.4.5）；基础的震动、框架和钟摆的振动，没有合适的测量方法和方法。 仪器已经开发出来。交叉引用:ISO 148-1ISO 148-3ISO/IEC 98-3JCGM 106购买本文件时提供的所有当前修订版均包含在购买本文件中。

BS EN ISO 148-2:2016 covers the verification of pendulum-type impact testing machines, in terms of their constructional elements, their overall performance and the accuracy of the results they produce. It is applicable to machines with 2 mm or 8 mm strikers used for pendulum impact tests carried out, for instance, in accordance with ISO 148-1.It can be applied to pendulum impact testing machines of various capacities and of different design.Impact machines used for industrial, general or research laboratory testing of metallic materials in accordance with this part of ISO 148 are referred to as industrial machines. Those with more stringent requirements are referred to as reference machines. Specifications for the verification of reference machines are found in ISO 148-3.This part of ISO 148 describes two methods of verification.The direct method, which is static in nature, involves measurement of the critical parts of the machine to ensure that it meets the requirements of this part of ISO 148. Instruments used for the verification and calibration are traceable to national or international standards.The indirect method, which is dynamic in nature, uses reference test pieces to verify points on the measuring scale for absorbed energy. The requirements for the reference test pieces are found in ISO 148-3.A pendulum impact testing machine is not in compliance with this part of ISO 148 until it has been verified by both the direct and indirect methods and meets the requirements of Clause 6 and Clause 7.This part of ISO 148 describes how to assess the different components of the total energy absorbed in fracturing a test piece. This total absorbed energy consists ofthe energy needed to fracture the test piece itself, andthe internal energy losses of the pendulum impact testing machine performing the first half-cycle swing from the initial position.NOTE Internal energy losses are due to the following:air resistance, friction of the bearings of the rotation axis and of the indicating pointer of the pendulum which can be determined by the direct method (see 6.4.5);shock of the foundation, vibration of the frame and pendulum for which no suitable measuring methods and apparatus have been developed.Cross References:ISO 148-1ISO 148-3ISO/IEC 98-3JCGM 106All current amendments available at time of purchase are included with the purchase of this document.