振动和冲击传感器的校准方法.第21部分:振动比较法校准

[中文适用范围]： 本部分描述了直线式振动传感器的比较法校准，虽然本部分主要描述的是与一只经过绝对法校准 的参考传感器进行直接比较的校准方法，该方法也能够用于校准体系中不同等级之间的校准。 本部分详细地说明了在振动频率从O．4 Hz～10 kHz范围内，运用比较法校准直线式振动传感器 的步骤。它主要针对在实验室条件下使用标准方法的振动测量，其测量不确定度相对较小。它也能用 于现场条件的测量，这样测量不确定度可能较大。 所有重要的不确定度源将影响校准结果，本部分也给出了评定扩展不确定度的方法。它包含使用 一个核查标准来进行校准时不确定度的估计。 本部分比较法校准的环境条件应与参考传感器校准时一致。 注：在极端环境条件下做传感器校准已包含在其他的标准中。 [外文原描述]： ISO 16063-21:2003 describes the calibration of rectilinear vibration transducers by comparison. Although it mainly describes calibration using direct comparison to a standard calibrated by primary methods, the methods described can be applied between other levels in the calibration hierarchy. ISO 16063-21:2003 specifies procedures for performing calibrations of rectilinear vibration transducers by comparison in the frequency range from 0,4 Hz to 10 kHz. It is primarily intended for those who are required to meet ISO standardized methods for the measurement of vibration under laboratory conditions, where the uncertainty of measurement is relatively small. It can also be used under field conditions, where the uncertainty of measurement may be relatively large. From knowledge of all significant sources of uncertainty affecting the calibration, the expanded uncertainty can be evaluated using the methods given in ISO 16063-21. It also covers the assessment of uncertainties for calibrations performed using a check standard. This document is applicable to calibrations outside the frequency range from 0,4 Hz to 10 kHz, considering the additional facts described in 4.3. Systems have been demonstrated to cover the range from 0,01 Hz to 30 kHz.