线缆测试仪输出电压校准方法研究  

The calibration method for cable tester output voltage

作　　者：何洪波[1] 叶峻江[1] 李春龙[1] 

机构地区：[1]广东省计量科学研究院东莞计量院,东莞523330

出　　处：《电子测量技术》2015年第7期1-5,共5页Electronic Measurement Technology

摘　　要：线缆测试仪输出电压具有内阻高、时间短等特点,传统的方法不能满足校准的要求,从而导致结果不准确。为解决这些问题,该文在制定JJF 1457-2014的过程中,选取典型线缆测试仪进行源内阻实验,选取常用的电压表进行响应时间实验。实验证明,线缆测试仪内部电压源阻抗大约为10kΩ~2 MΩ,电压表响应时间约为0.5~1.0s。通过实验,获得了应选用内阻高于1GΩ以及响应时间应小于被校仪器输出电压持续时间的标准电压表的结论。Cable tester output voltage has the features of high resistance and short time,the traditional calibration methods can not meet the requirements,leading to inaccurate results.To solve these problems,the authors in the process of developed JJF 1457-2014,select typical cable testers to source internal resistance test,select common voltmeters to response time test.Experiments show that the cable testers internal source impedance of approximately 10kΩ ~2MΩ,voltmeter response time of approximately（0.5~1.0）s.Through experiments,has reached the conclusions that the standard voltmeters internal resistance should be higher than 1GΩand the response time should be less than the output voltage duration of the instrument was been calibrated.

关 键 词：校准 线缆测试仪 测试电压 

分 类 号：TM933.2[电气工程—电力电子与电力传动]