1mV～10mV直流电压的高准确度校准
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摘要
针对1mV～10mV直流电压溯源方面存在的问题,提出采用恒流源、标准取样电阻和标准直流电压表的方法对较小的直流电压进行校准。采用5720A输出稳定的直流电流,用742A作为取样电阻,用8508A作为标准直流电压表,根据欧姆定律进行校准工作,并给出了消除或减小校准过程中存在的各种影响量的途径。对数字多用表8508A进行校准,分别评定了1mV、10mV点的测量不确定度,通过与分压箱法的对比和传递比较法验证,证明了取样电阻法的可行性和准确性,能够满足1mV～10mV小电压校准需求。
In order to resolve the problem of 1mV～10mV DCV retrace,a calibration method which uses a constant current source,a standard sample resistor and a DCV voltage meter is proposed. The calibration was based on ohm's law,a 5720 A is usedas the current source,the 742 A are used as sample resistors,a 8508 A is used as the voltage meter,the way to eliminate the effectof influence quantities is given. A 8508 A is calibrated,the uncertainties on 1mV and 10 mV are evaluated,according to the compari-son with results from voltage divider method and uncertainties transfer comparison validation,the sample resistor method is proved to be feasible and accurate and can fulfill the calibration requirement of 1mV～10mV DCV.
In order to resolve the problem of 1mV～10mV DCV retrace,a calibration method which uses a constant current source,a standard sample resistor and a DCV voltage meter is proposed. The calibration was based on ohm's law,a 5720 A is usedas the current source,the 742 A are used as sample resistors,a 8508 A is used as the voltage meter,the way to eliminate the effectof influence quantities is given. A 8508 A is calibrated,the uncertainties on 1mV and 10 mV are evaluated,according to the compari-son with results from voltage divider method and uncertainties transfer comparison validation,the sample resistor method is proved to be feasible and accurate and can fulfill the calibration requirement of 1mV～10mV DCV.
引文
[1]陈晓峰,袁蓉.多型号高精度数字多用表检定系统设计与实现[J].电子测量技术,2015,38(9):10-39.CHEN Xiaofeng,YUAN Rong. On the design and realiza-tion of multi-type precision digital multimeter verificationsystem[J]. Electronic Measurement Technology,2015,38(9):10-39.
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[13]叶德培,赵峰,施昌彦,等. JJF1059.1-2012测量不确定度的评定与表示[S].北京:中国质检出版社,2012:8-23.YE Depei,ZHAO Feng,SHI Changyan,et al. Evaluationand expression of uncertainty in measurements[S]. Bei-jing:China Zhijian Publishing House,2012:8-23.
[14]李宗扬.计量技术基础[M].北京:原子能出版社,2002:239-277.LI Zongyang. Basic Knowledge of Metrology[M]. Bei-jing:Atomic Energy Press,2002:239-277.
[15]于灵.二等直流标准电阻器测量结果不确定度评定[J].计量与测试技术,2012,39(6):64-65.YU Ling. The uncertainty of the second DC resistors mea-surement results evaluation[J]. Metrology and Measure-ment Technology,2012,39(6):64-65.
[16]冯登超.测量不确定度在多元数据处理的应用[J].电子测量与仪器学报,2009,23(s1):46-50.FENG Dengchao. Application of measurement uncertain-ty in multi-data processing[J]. Journal of ElectronicMeasruement and Insturmentation,2009,23(s1):46-50.
[2]王艳维,付璇.数字多用表标准装置8508A测量不确定度的评定[J].电子测试,2015(3):29-31.WANG Yanwei,FU Xuan. Standard Equipment 8508ADigital Multimeter assessment of Measurement Uncertain-ty[J]. Electronic Test,2015(3):29-31.
[3]张浩,怀心东.5520A校准仪和8508A数字表组成标准装置的不确定度评定[J].计测技术,2015(s1):235-236.ZHANG Hao,HUAI Xindong. Measurement UncertaintyAssessment of Standard Equipment composed of 5520ACalibrator and 8508A multimeter[J]. Metrology&Mea-surement Technology,2015(s1):235-236.
[4]刘霞美,乔玉娥,翟玉卫,等.数字多用表比率测量功能在标准电阻器校准中的应用[J].电子测量技术,2016,39(6):24-27.LIU Xiamei,QIAO Yu'e,ZHAI Yuwei,et al. Applicationof the ratio function method in calibrating the DC resis-tance[J]. Electronic Measurement Technology,2016,39(6):24-27.
[5]张露妍,冯亮.数字多用表测量直流高值电阻测量结果的不确定度评定[J].仪器仪表标准化与计量,2013(3):41-43.ZHANG Luyan,FENG Liang. Evaluation of Uncertainty ofDC High Value Resistance Measured by the Digital Multi-meter[J]. Instrument Standardization&Metrology,2013(3):41-43.
[6]夏春燕,汪小婷.比率测量法校准直流标准电压源的研究[C]//2014国防计量与测试学术交流会,2014:407-408.XIA Chunyan,WANG Xiaoting. The Study of Using RatioMethod to Calibrate High Precision DC Voltage Calibrator[C]//SYMPOSIUM ON National Defense METROLOGYAND MEASUREMENT 2014,2014:407-408.
[7]罗春妹,赵文峰. 8508A新型数字多用表校准方法研究[C]//计量测试学术交流会,2003:87-92.LUO Chunmei,ZHAO Wenfeng. Study on calibrationmethod for new 8508A multimeter[C]//Symposium on Me-trology and Measurement,2003:87-92.
[8]温世仁,杨宏海. FLUKE8508A数字多用表电压校准研究[J].宇航计测技术,2005,25(6):36-40.WEN Shiren,YANG Honghai. Research on Voltage Cali-bration of FLUKE8508A Reference Multimeter[J]. Jour-nal of Astronautic Metrology&Measurement,2005,25(6):36-40.
[9]倪有明.直流毫伏级小电压校准方法[J].计测技术,2009,29(5):39-42.NI Youming. DC-mV-level Voltage Calibration Method[J]. Metrology&Measurement Technology,2009,29(5):39-42.
[10]庄双勇,陈怀艳.同等级固态电压标准的校准方法的实现[C]//2010国防计量与测试学术交流会,2010:215-221.ZHUANG Shuangyong,CHEN Huaiyan. A new Calibra-tion Method for the Same Level DC Reference Standard[C]//Symposium on National Defense Metrology andMeasurement,2010,2010:215-221.
[11]杭标,高金伟.在毫伏级量程校准电压交直流转换标准的方法[J].电子测量技术,2016,39(6):28-30.HANG Biao,GAO Jinwei. Calibration of AC-DC voltageconverter traceability at millivolt range[J]. ElectronicMeasurement Technology,2016,39(6):28-30.
[12]刘钺,赵洪刚,陈清平,等.JJF 1587-2016数字多用表校准规范[S].北京:中国质检出版社,2016:5-6.LIU Yue,ZHAO Honggang,CHEN Qingping,et al. Cal-ibration Specification for Multimeters[S]. Beijing:Chi-na Zhijian Publishing House,2016:5-6.
[13]叶德培,赵峰,施昌彦,等. JJF1059.1-2012测量不确定度的评定与表示[S].北京:中国质检出版社,2012:8-23.YE Depei,ZHAO Feng,SHI Changyan,et al. Evaluationand expression of uncertainty in measurements[S]. Bei-jing:China Zhijian Publishing House,2012:8-23.
[14]李宗扬.计量技术基础[M].北京:原子能出版社,2002:239-277.LI Zongyang. Basic Knowledge of Metrology[M]. Bei-jing:Atomic Energy Press,2002:239-277.
[15]于灵.二等直流标准电阻器测量结果不确定度评定[J].计量与测试技术,2012,39(6):64-65.YU Ling. The uncertainty of the second DC resistors mea-surement results evaluation[J]. Metrology and Measure-ment Technology,2012,39(6):64-65.
[16]冯登超.测量不确定度在多元数据处理的应用[J].电子测量与仪器学报,2009,23(s1):46-50.FENG Dengchao. Application of measurement uncertain-ty in multi-data processing[J]. Journal of ElectronicMeasruement and Insturmentation,2009,23(s1):46-50.