I. Overview:

   The DC resistance tester, with a high-speed microcontroller as its core, built-in rechargeable battery and charging circuit, adopts high-speed A/D converter and multi-range programmable current source technology, achieving wide-range resistance measurement, reaching excellent measurement results and highly automated measurement functions. It features high precision, wide measurement range, stable data, good repeatability, strong anti-interference capability, complete protection functions, and fast charge/discharge speed. It is especially suitable for field use without power supply and for measuring large resistance windings such as transformers. This instrument is small in size, light in weight, and easy to carry, making it the newest product for transformer DC resistance testing.

ZGY-3 Transformer DC Resistance Tester (with built-in rechargeable battery) Main Functions and Features:

1. Uses high-speed 16-bit A/D converter, providing stable measurement data and good repeatability.

2. Built-in rechargeable battery and fast charging circuit, with charging indication and overcharge protection.

3. Automatic programmable current source technology, allowing manual selection of typical output current or automatic control by the internal microcontroller. The current source has 3000 current levels internally; in automatic mode, the internal microcontroller automatically controls based on the measured resistance, achieving a relatively wide measurement range and optimal measurement state.

4. Real-time dynamic display with fast response; the tap changer can be switched directly during measurement, and the instrument will automatically prompt, with the new resistance value displayed quickly without restarting.

5. Highly intelligent design with ingenious and advanced function settings, capable of automatically detecting faults such as loose test leads or broken wires.

6. Complete protection functions, reliably protecting the instrument from back EMF impact, with automatic discharge indication.

7. Can display measurement current and measurement time.

8. Can store 250 measurement data, not lost upon power failure.

9. All Chinese menu and operation prompts, intuitive and convenient.

ZGY-3 Transformer DC Resistance Tester (with built-in rechargeable battery) Main Technical Specifications:

1. Output current and range: Output current: 0-10A, range 100mΩ-30kΩ.

Current

Range

Current

Range

10A

0.5mΩ-600mΩ

0.

1Ω-12Ω

1mΩ-1.2Ω

0.2A

3Ω-30Ω

2A

10mΩ-3Ω

20mA

25Ω-300Ω

  Note: For ranges beyond the above, please use the automatic test function.

2. Test accuracy:  0.2%  Maximum resolution: 0.1mΩ.

3. The instrument uses 65k true color LCD display, Chinese menu prompts, easy operation.

4. Has large capacity storage function, can store 2000 test records,

5. Power supply:  AC220V±10%　

6. Operating temperature: -10℃～40℃.　　

Operating humidity: ambient humidity <80%RH.