JJG226-2001双金属温度计检定规程.pdf

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1、双金属温度计检定规程JJG226-2001.厂叭双金属温度计检定规程个气丫JJG226-2001丫VerificationRegulationof冷代替JJG226-1989二从BimetallicThermometers本规程经国家质量监督检验检疫总局于2001年06月05日批准，并自2001年10月01日起施行归口单位:全国温度工作器具计量技术委员会起草单位:天津市计量技术研究所本规程委托全国温度工作器具计量技术委员会负责解释本规程主要起草人:王美华(天津市计量技术研究所)蒋静(天津市计量技术研究所)目录1范围··························

2、··························································，····⋯⋯9482引用文献·························································································⋯⋯9483术语········、·，，、·、···，·，，、、··、、、、····、、，，、··、、、、·····、·，·、、、·⋯⋯9484概述··················································

3、·········································⋯⋯9485计量性能要求··················································································⋯⋯9486通用技术要求·······························，················································，·⋯⋯9497计量器具控制·············································

4、·····································⋯⋯950附录A双金属温度计检定记录格式····················································，·····⋯⋯954附录B数据处理举例·················································、···························‘⋯⋯954附录C'误差分析实例································································

5、············⋯⋯955双金属温度计检定规程范围本规程适用于测量范围在一80一十500'C，由双金属元件和护套组成温度检测元件且具有圆形度盘的双金属温度计(以下简称温度计)的首次检定、后续检定和使用中检验。引用文献本规程引用文献:JJF1059-1999《测量不确定度评定与表示》Jt3/I'8803-1998《双金属温度计》使用本规程时应注意使用上述引用文献的现行有效版本。术语可调角双金属温度计可以调整指示装置与检测元件轴线之间角度0-90的双金属温度计电接点双金属温度计一种带缓行开关式电气接触装置的双金属温度计。4概迷双金属温度计用膨胀系数不同的两种金属

6、(或合金)片牢固结合在一起组成感温元件，一般绕制成螺旋形，见图1所示，其一端固定，另一端(自由端)装有指针。当温度变化时，感温元件曲率发生变化，自由端旋转，带动指针在度盘上指示出温度数值。5计t性能要求.1准确度等级和最大允许误差温度计的准确度等级和最大允许误差(允许误差限)应符合表1的规定。.2角度调整误差可调角温度计因角度调整引起的示值变化应不超过其量程的1.0960表1准确度等级{最大允许误差(量程的%)龙}准确度等级}最大充i}-W要一政履晶%)it一::.:一}24.50士2.5士4.0士2.05.3回差温度计的回差应不大于最大允许误差的绝对值。5.4重复

7、性固定端图1温度计的重复性应不大于最大允许误差绝对值的liZo5.5设定点误差电接点温度计其设定点误差应不大于最大允许误差的1.5倍。5.6切换差电接点温度计，其切换差应不大于最大允许误差绝对值的1.5倍。5.7切换重复性电接点温度计，其切换重复性应不大于最大允许误差绝对值的1/205.8热稳定性首次检定的温度计在测量上限保持表2规定的时间后，其示值误差仍应符合本规程5.1的规定。表2汉最上限飞保持时间击侧量卜限八一保持时间击246通用技术要求6.1外观6.1.1温度计各部件装配要牢固，不得松动，不得有锈蚀，保护套应牢固、均匀和光洁。6.1.2温度计表头所用的玻