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What is the ZXR-20A DC Resistance Tester? Key FeaturesandTechnicalSpecifications
The ZXR-20A DC Resistance Tester is a high-precision, portable instrument designed for rapid and reliable measurement of DC resistance in transformers and other electrical equipment. Combining advanced power technology with intelligent control, it addresses the challenges of field testing with its compact design, wide measurement range, and robust functionality. Below is a detailed overview of its capabilities and technical specifications.
Core Features
1.High-Speed Microcontroller Control
The ZXR-20A is driven by a high-speed microcontroller, ensuring automated operation, rapid data processing, and user-friendly interaction. Its intuitive 7-inch touchscreen supports both Chinese and English interfaces, enabling seamless operation even in bright outdoor environments.
2.Multi-Current Output & Extended Measurement Range
With six selectable test currents (<20mA, 1A, 2.5A, 5A, 10A, 20A), the instrument covers a broad resistance range from 100μΩ to 20kΩ, making it suitable for small components to large power transformers. Accuracy reaches ±0.2% + 2 digits across most ranges (20A–1A), ensuring reliable results for critical applications.
3.Advanced Safety and Protection
Engineered to withstand back electromotive force (EMF) surges during inductive load testing, the ZXR-20A integrates multiple safeguards. An audible discharge alarm and visual indicators minimize operator error during post-test discharge cycles.
4.Smart Power Management
A dynamic power optimization system reduces energy consumption and heat generation, enhancing device longevity and field usability. Maximum power consumption is limited to 500W.
5.Data Handling and Connectivity
Stores 1,000 test records with timestamps via an onboard calendar clock.
Supports RS232, USB, and wireless communication (via Android app) for data transfer to PCs or cloud platforms.
Includes a built-in thermal printer for immediate bilingual (Chinese/English) report generation.
6.Enhanced Portability
Weighing 15.1 kg (main unit) with a compact footprint (400×225×350 mm) and a 13-meter test lead set, the system is optimized for mobility in rugged environments.
Technical Specifications
Parameter | Details |
Test Currents | <20mA, 1A, 2.5A, 5A, 10A, 20A |
Measurement Ranges | 100μΩ–1Ω (20A), 500μΩ–2Ω (10A), 1mΩ–4Ω (5A), 2mΩ–8Ω (2.5A), 5mΩ–20Ω (1A), 10Ω–20kΩ (<20mA) |
Resolution | 0.1μΩ |
Accuracy | ±(0.2% + 2 digits) for 1A–20A ranges; ±(0.5% + 2 digits) for <20mA |
Display | 7-inch color touch LCD, 4-digit resolution |
Power Supply | AC 220V ±10%, 50Hz ±1Hz; 5A fuse protection |
Operating Conditions | 0°C–40°C, <90% RH (non-condensing) |
Data Interfaces | RS232, USB, wireless app control (Android) |
Applications
The ZXR-20A excels in preventive maintenance and quality assurance for power systems, particularly for:
1.Transformer winding resistance testing
2.Circuit breaker contact resistance evaluation
3.Cable and busbar resistance measurement
4.Grounding system inspections
By merging precision, durability, and smart connectivity, the ZXR-20A DC Resistance Tester streamlines field testing workflows while delivering laboratory-grade accuracy. Its adaptive current output, safety features, and data management tools make it an indispensable tool for electrical engineers and maintenance teams working across diverse industrial environments.
GDZX is a manufacturer of power detection equipment, offering a diverse range of products with comprehensive models and providing professional technical support. Contact us at +86-27-6552607 or +86-17396104357.Website: http://en.gdzxdl.com/
