JJG 499-2004 精密露点仪

订wiu

中华人民共和国国家计量检定规程

JJG499-2004

精密露点仪

PrecisionDew一pointHygrometers

2004一06一04发布2004一12一01实施

国家质量监督检验检疫总局发布

JJG499-2004

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精密露点仪检定规程乙仑

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弓仑

PrecisionDew一pointHygrometers、、.夕

本规程经国家质量监督检验检疫总局于2004年06月04日批准，并自

2004年12月01日起施行。

归口单位:全国物理化学计量技术委员会

主要起草单位:国家标准物质研究中心

参加起草单位:国防科工委第一计量测试研究中心

本规程委托全国物理化学计量技术委员会负责解释

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JJG499-2004

本规程主要起草人:

易洪(国家标准物质研究中心)

参加起草人:

李占元(国家标准物质研究中心)

任长青(国家标准物质研究中心)

廖理(国防科工委第一计量测试研究中心)

JJG499-2004

目录

1范围····。·········，···········……(1)

2概述··················。·······················································，，··············……(1)

3计量性能要求··············································································……(2)

3.1准确度等级········································‘···(2)

3.2示值误差················，········，···················，···，·················，·········……(2)

4通用技术要求·，，·，·，··············，·，·-··············，，，，，··················，··········一(2)

4.1外观检查·······，···················，··。·················，··················，·············……(2)

4.2露点室及传感器检查··················································，···············……(2)

5计量器具控制······························································，，··········……(2)

5.1检定条件····4··4，··············4··4··············，·················，·，···············……(2)

5.2检定项目························，·····················。······························……(3)

5.3检定方法·················································································……(4)

5.4检定结果的处理············。···························································……(5)

5.5检定周期········4······················································(5)

附录A露点仪测量的扩展不确定度·，·。···············，，，·。·····，，·，，··········】···，，，一(6}

附录B露点仪检定记录表·································································……(7)

附录C露点仪检定证书(内页)格式···················································……(8)

附录D露点仪检定结果通知书(内页)格式·········································……(9)

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JJG499-2004

精密露点仪检定规程

1范围

本规程适用于热电制冷(镜面或声表面波器件)自动检测露层的平衡式精密露点仪

的首次检定、后续检定和使用中检验。

2概述

在等压的条件下使气体中水蒸气冷却至凝聚相出现，通过控制露层传感器露层的温

度，使气体中的水蒸气与水(或冰)的平展表面呈热力学相平衡状态，