1.1 本规程适用于在最终使用条件下，用手持式湿度计测量实木的含水量，包括含有添加剂（即化学品或粘合剂）的实木制品。 1.1.1 该实践包括校准、使用和解释与木材产品特性相关的条件，如不均匀的纹理和生长环方向，以及最终使用过程条件，如湿度梯度。 1.1.2 在相同条件下，采用不同技术的仪表不一定能提供同等读数。当应用本规程时，除非另有规定，否则假设参考仪表是可接受的。 仪表应通过测试方法进行校准 D4444 . 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 手持式仪表提供了一种在加工过程中和加工后对木质材料的水分含量进行快速采样的方法，以保持质量保证和符合标准。然而，这些测量是推断的；也就是说，测量电气参数并与校准进行比较，以获得水分含量的间接测量值。电气测量受实际含水量、许多其他木材变量、环境条件、测量探头电路的几何形状和仪表设计的影响。只有了解每个参数对仪表输出的影响，并按照这些测试方法的规定校正读数，才能获得最大精度。 附录X1 是一篇评论文章，对强制性章节进行了解释，并对历史实践进行了讨论。 附录X2 处理工艺和木材变量的影响。 4.1.1 本规程规定了包含商业特性并反映制造环境的木制品的校准和应用。 4.2 手持式湿度计的大多数使用都采用了仪表读数与木材面积或体积之间的相关（预测）关系，这些关系超过了直接测量的木材面积或体积（例如，较大的样本、木块、批次）。 本规程的现场校准部分预计了这种取样的潜在需求。这些相关用途在 附录X3 .

1.1 This practice applies to the measurement of moisture content of solid wood, including solid wood products containing additives, that is, chemicals or adhesives, by hand-held moisture meters under conditions of end-use. 1.1.1 This practice includes calibration, use, and interpretation of meters for conditions that relate to wood product characteristics, such as nonuniform grain and growth ring orientation, and to end-use process conditions, such as moisture gradients. 1.1.2 Meters employing differing technologies will not necessarily provide equivalent readings under the same conditions. When this practice has been applied, it is assumed that the referenced meter is acceptable unless otherwise specified. Meters shall have been calibrated by Test Methods D4444 . 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard 1.3 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. 1.4 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 ====== 4.1 Hand-held meters provide a rapid means of sampling moisture content of wood-based materials during and after processing to maintain quality assurance and compliance with standards. However, these measurements are inferential; that is, electrical parameters are measured and compared against a calibration to obtain an indirect measure of moisture content. The electrical measurements are influenced by actual moisture content, a number of other wood variables, environmental conditions, geometry of the measuring probe circuitry, and design of the meter. The maximum accuracy can only be obtained by an awareness of the effect of each parameter on the meter output and correction of readings as specified by these test methods. Appendix X1 is a commentary that provides explanation of the mandatory sections and discussion of historical practices. Appendix X2 addresses the influence of process and wood variables. 4.1.1 This practice provides for calibration and application of wood products that contain commercial characteristics and that reflect the manufacturing environment. 4.2 Most uses of hand-held moisture meters employ correlative (predictive) relationships between the meter reading and wood areas or volumes that exceed that of the direct meter measurement (for example, larger specimens, pieces of lumber, lots). The field calibration section of this practice anticipates the potential need for this type of sampling. These correlative uses are examined in Appendix X3 .