10A DC Resistance Tester - Yangzhou DARUI - Yangzhou Darui Electric Co., Ltd.

10A DC Resistance Tester - Yangzhou DARUI

Published: 2020-08-26 08:39:05

Category: DC Resistance Tester

Product Description

10A DC Resistance Tester

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The 10A DC Resistance Tester, with a high-speed microcontroller as its core, adopts high-speed A/D converter and programmable current source technology,achieving unprecedented measurement results and highly automated measurement functions. It features high accuracy, wide measurement range, stable data, good repeatability, strong anti-interference capability, and comprehensive protection functions. It also has fast charge and discharge speeds. This instrument is small in size, light in weight, and easy to carry, making it a new generation product for transformer DC resistance testing.

Product Overview

The DC resistance tester typically has measurement currents of: 1A, 3A, 5A, 10A, 20A, 30A, and other different measurement ranges. The instrument consists of a constant current power supply and a voltage signal detection part, with five-digit LCD digital display. The output current range is adjustable, suitable for DC resistance measurement of various small and medium-sized transformers.

Transformer DC resistance measurement is a mandatory test item in transformer manufacturing for semi-finished products, finished product factory tests, installation, commissioning tests, and preventive tests in the power sector. It can effectively detect manufacturing defects such as poor material selection, welding issues, loose connections, missing strands, broken wires in transformer coils, as well as hidden dangers after operation.

The DC resistance tester is a new generation of transformer DC resistance testing instruments. It can automatically select the test current according to different types of power transformers and display test results at the fastest speed. The DC resistance tester also has storage, printing, discharge indication, and other functions. It is equipped with a non-volatile memory that can store measurement data for a long time. The use of a liquid crystal display gives the instrument a good human-machine interface, making it the preferred equipment for DC resistance testing work.

The DC resistance tester is a high-precision, wide-range resistance tester controlled by a high-performance microprocessor. It can test resistances from 1μΩ to 3MΩ, with a maximum display of 30,000 counts. The highest test speed is 60 times/second. At a test speed of 15 times/second, it can still guarantee an accuracy of 0.05%, and the reading fluctuation can be controlled below 3 digits. It comes standard with temperature compensation function, allowing precise testing of meter resistances. Three current modes can meet various demanding resistance testing requirements.

The transformer DC resistance tester is a new type of instrument designed for measuring DC resistance of large-capacity transformers. It is composed of a high-precision constant current power supply and a test part integrated into one unit. The test process is controlled by a microcomputer, automatically completing constant current judgment, data acquisition, data processing, resistance value display, and printing.

The DC resistance tester is a high-precision replacement product for DC single and double-arm bridges. The instrument adopts advanced switching power supply technology, and its measurement speed is more than a hundred times faster than that of bridges. The display part uses a four-and-a-half-digit LCD to show measurement results, and a three-and-a-half-digit LCD to show ambient temperature or test current value, overcoming the disadvantage of other similar products with LED displays that are difficult to read in sunlight. At the same time, it has an automatic arc suppression function. This instrument has the advantages of fast measurement speed, high accuracy, intuitive display, strong anti-interference capability, small size, low power consumption, stable and reliable test data, and is not affected by human factors. The instrument is equipped with a rechargeable battery pack (12V), and can be used with both AC and DC power, making it convenient for on-site and field testing.

Functions and Features

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

2. Automatic programmable current source technology, with a total of 1000 current ranges set by the internal microcontroller based on the measured resistance, achieving a relatively wide measurement range and optimal measurement state without manual current switching.

3. Fast response speed; the tap changer can be directly switched during measurement, and the instrument will automatically prompt, with the new resistance value displayed quickly.

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

5. Comprehensive protection functions, reliably protecting the instrument from back EMF impacts, with automatic discharge indication.

6. Can display measurement current and measurement time.

7. Intelligent power management technology effectively reduces internal heat generation.

8. Can store 120 measurement data records, which are not lost when power is off.

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

Note: The above information and technical parameters are compiled and published by Yangzhou DARUI Electric Co., Ltd.

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