目 录
范围
概述
计量性 能要 求
3.1 测量仪准确度等级 二.,....................................................................... (1)
3.2 测量仪稳定度 ···········································································…… (1)
4 通用技术要求 ··············································································…… (2)
4.1 外观 ·······················································································…… (2)
4.2 安全要求 ·················································································…… (2)
5 计量器具控制 ··············································································…… (2)
5.1 检定条件 ·················································································…… (2)
5.2 检定项目 ··········································。······································…… (3)
5.3 检定方法 ·················································································…… (3)
5.4 检定结果的处理 ·································。······································…… (4)
5.5 检定周期 ···············································································……. (4)
附录A 木材含水率测量仪检定记录········································。·············…… (5)
附录B 饱和盐溶液上方空气相对湿度表及制作方法·········。·······················…… (6)
附录C 木材样品的技术要求 ·······························································…… (7)
附录D 检定证书 (背面)格式·····················。······································…… (8)
附录E 检定结果通知书 (背面)格式····················································。·… (9)
木材含水率测u仪检定规程
范 围
本规程适用于对木材及其制品含水率进行测量的木材含水率测量仪 (以下简称测量
仪)的首次检定、后续检定和使用中检验。
概 述
测量仪主要用于快速检测木材、木制品及人造板材中的含水率。测量仪按原理区
分，主要有电阻法和电容法。电阻法测量仪是把木材中的含水率通过探针及相关电路转
换成电信号，再通过对电信号的转换，显示仪表指示测量值。电容法测量仪是把木材含
水率变化引起的电容介电常数的改变，通过测量电路转换为电信号，再经过转换，由显
示仪表显示测量值。
3 计f性能要求
测量仪准确度等级
示值误差以绝对误差来表示，测量仪按示值误差可分为三个等级，见表
表 1 仪器示值允许误差
准确度等级 示值最大允许误差/%
1.0级 土1.0
土2.0
2.0级
士5.0
5.0级 ‘
测量仪在含水率6%一28%范围内应符合表 I的规定。
5.0级“测量仪特指未指定材种或无杨木含水率刻度的测量仪，而且其任一材种刻
度的示值误差均不得大于土5.0%。有杨木含水率刻度的测量仪，其示值误差不得大于
士2.0%。
3.2 测量仪稳定度
在检定环境条件下，电源电压变化 10%时，由示值变化所引起的误差，在含水率
6%一28%范围内应符合表2的规定。
