1.1 本测试方法描述了设备和程序，以确保各种动态摩擦测试仪（DF测试仪）用户执行的校准是统一的并符合制造商规范。使用中的DF测试仪有三种型号:（ 1 ）USB/个人电脑，（ 2 ）控制器，以及（ 3 )X-Y绘图仪。注明了不同型号的特定程序。用户级校准软件与操作软件分开，必须从USB/个人计算机型号的制造商处获得。 1.2 该测试方法是对DF测试仪的垂直载荷、摩擦力（µ）和速度的静态校准。当按照测试方法使用时，遵守本用户级校准程序可确保DF测试仪具有更高水平的可重复性和再现性 E1911 . 1.3 用户级校准不包括更换mu弹簧或调整DF测试仪的线性度。建议每年由制造商认可的实验室对DF测试仪进行检查，以更换mu弹簧，确保线性度，并识别其他用户无法维修的磨损。 1.4 以SI（公制）单位表示的值应被视为标准值。英寸-磅当量是合理化的，而不是精确的数学转换。 1.5 本标准并不旨在解决与其使用相关的所有安全性问题（如果有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践并确定法规限制的适用性。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ======意义和用途====== 5.1 用户级校准过程可用于验证DF测试仪是否正常运行，是否在制造商规范范围内，并执行微小调整以使装置恢复符合制造商规范。 5.2 本文描述的DF测试仪用户级校准不能消除所有误差源，也不能保证设备的正确操作。一些调整和维修超出了本标准的范围，仍然建议每年进行制造商批准的校准。

1.1 This test method describes the equipment and procedure to ensure that the calibration performed by various dynamic friction tester (DF tester) users is uniform and in accordance with manufacturer specifications. There are three models of the DF tester in use: ( 1 ) USB/personal computer, ( 2 ) controller, and ( 3 ) X-Y plotter. Procedures specific to the different models are noted. User-level calibration software is separate from the operation software and must be obtained from the manufacturer for the USB/personal computer model. 1.2 This test method is a static calibration of the vertical load, friction (µ) force, and speed of the DF tester. Compliance to this user-level calibration procedure ensures a higher level of repeatable and reproducible performance of the DF tester when used in accordance with Test Method E1911 . 1.3 The user-level calibration doesn’t include the replacement of the mu spring or the adjustment of linearity of the DF tester. It is recommended that DF testers be inspected by a manufacturer-approved laboratory on an annual basis to replace the mu spring, ensure linearity, and to identify other non user-serviceable wear. 1.4 The values stated in SI (metric) units are to be regarded as standard. The inch-pound equivalents are rationalized, rather than exact mathematical conversions. 1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 The user-level calibration process may be used to verify that the DF tester is functioning properly, that it is within manufacturer specifications, and to perform minor adjustments to bring the unit back into conformance with manufacturer specifications. 5.2 The DF tester user-level calibration described herein does not eliminate all error sources, nor does it guarantee the proper operation of the device. Several adjustments and repairs are beyond the scope of this standard, and manufacturer-approved calibrations are still recommended on an annual basis.