产品概述  Product Overview   

HLY600A大电流微欧计（回路电阻测试仪）根据中华人民共和国新的电力执行标准DL/T845.4-2004，采用高频开关电源技术和数字电路技术相结合设计而成。它适用于开关控制设备回路电阻的测量。其测试电流采用国家标准推荐的直流100A和200A。可在电流100A的情况下直接测得回路电阻，也可以在电流200A、400A或600A的情况下直接测得回路电阻，最后的测试结果都用数字显示出来。该仪器测量准确、性能稳定，符合电力、供电部门现场高压开关维修和高压开关厂回路电阻测试的要求。

The HLY600A high-current micro-ohmmeter (loop resistance tester) is designed based on the new power execution standard DL/T845.4-2004 of the People's Republic of China，utilizing a combination of high-frequency switching power supply technology and digital circuit technology。It is suitable for measuring the loop resistance of switch control equipment. Its test currents adopt the DC 100A and 200A recommended by national standards。 It can directly measure the loop resistance at a current of 100A，as well as at 200A, 400A, or 600A。The final test results are displayed digitally。This instrument provides accurate measurements and stable performance， meeting the requirements of on-site high-voltage switch maintenance by power and electricity supply departments，as well as loop resistance testing in high-voltage switch factories。

产品用途 Product Application   

该仪器适用于高压开关接触电阻（回路电阻）的高精度测量，同样适用于其它需要大电流、微电阻测量的场合。

This instrument is suitable for high-precision measurement of contact resistance (loop resistance) in high-voltage switches，and it is equally applicable to other scenarios requiring large current and micro-resistance measurements。

性能特点  Performance Characteristics 

1.大电流：采用最新电源技术，能长时间连续输出大电流，克服了脉冲式电源瞬间电流的弊端，可以有效的击穿开关触头氧化膜，得到良好的测试结果。

2.抗干扰能力强：在严重干扰条件下，液晶屏最后一位数据能稳定在±1个字范围内，读数稳定，重复性好。

3.使用寿命长：全部采用高精度电阻，有效的消除环境温度对测量结果的影响，同时军品接插件的使用增强了抗振性能。

4.携带方便：体积小、重量轻。

1. High Current:：Utilizing the latest power technology, it can continuously output high current for extended periods， overcoming the drawbacks of pulsed power's instantaneous current，This effectively breaks down the oxidation film on switch contacts，resulting in excellent test results。

2. Strong Anti-interference Capability：Under severe interference conditions，the last digit of the LCD display remains stable within ±1 digit, ensuring stable readings and excellent repeatability。

3. Long Service Life: Employing high-precision resistors，it effectively eliminates the impact of ambient temperature on measurement results。Additionally， the use of military-grade connectors enhances its vibration resistance。

4. Convenient Portability： Its small size and light weight make it easy to carry。

技术指标  Technical Specifications   

1.测量范围：1～1999μΩ

2.分 辨 率：1μΩ

3.测试电流：DC 100A、200A、400A、600A 四档固定输出

4.测量精度：0.5%±1d

5.工作方式：连续

6.显示方式：三位半LCD

7.工作电源：AC220V±10%  50Hz

8.工作环境：温度- 10℃～40℃   湿度≤80 %RH

1. Measurement range：1-1999 μ Ω

2. Resolution: 1 μ Ω

3. Test current：Four fixed outputs of DC 100A, 200A, 400A, and 600A

4. Measurement accuracy：0.5% ± 1d

5. Working mode： continuous

6. Display mode：Three and a half digit LCD

7. Working power supply： AC220V ± 10% 50Hz

8. Working environment：Temperature -10 ℃~40 ℃ Humidity ≤ 80% RH

操作方法   Operation method   

1.按下图接线方法接线。

                                上图　四端子接线图

2.仪器面板与测试线的连接处应扭紧，不得有松动现象。

3.应按照四端子法接线，即电流线应夹在被试品的外侧，电压线应夹在被试品的内侧，电流与电压必须同极性。

4.检查确认无误后，接入220V交流电，合上电源开关，仪器进入开机状态。

5.调节“电流选择”旋钮，选择要选用的电流档位，然后按下“测量”键此时电阻表显示值为所测的回路电阻值。若显示1，则表示所测回路电阻值超量程。

6.测量完毕，断开电源开关，将测试线夹收好，放入附件包内。

7.如果遇到什么技术问题，您可以拨打我们24小时服务热线：027-87409251  13871255353