10A DC Resistance Tester
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The DC resistance tester, with a high-speed microcontroller at its core, adopts high-speed A/D converter and programmable current source technology, achieving unprecedented measurement effects and highly automated measurement functions. It features high precision, wide measurement range, stable data, good repeatability, strong anti-interference capability, and comprehensive protection functions. It also has fast charging and discharging 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 ranges. The instrument consists of a constant current power supply and voltage signal detection, with five-digit LCD 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, handover tests, and preventive tests by power departments. It can effectively detect manufacturing defects such as material selection, welding, 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 the test results at the fastest speed. The DC resistance tester also has functions such as storage, printing, and discharge indication. It is equipped with a non-volatile memory that can store measurement data for a long time. The adoption of a liquid crystal display gives the instrument a good human-machine interface, making it the preferred equipment in 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 within 3 digits. It comes standard with temperature compensation function, allowing precise testing of meter resistors. 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 consists of a high-precision constant current power supply and test section integrated into one unit. The test process is controlled by a microcomputer, automatically completing current stabilization judgment, data acquisition, data processing, resistance 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 a bridge. The display part uses a four-and-a-half-digit LCD to display measurement results, and a three-and-a-half-digit LCD to display ambient temperature or test current value, overcoming the disadvantage of other similar products with LED displays that are inconvenient to read in sunlight. At the same time, it has automatic arc suppression function. This instrument has the advantages of fast measurement speed, high precision, 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), dual-use AC/DC, convenient for on-site and field testing.
2. Automatic programmable current source technology. The current source has a total of 1000 current ranges, automatically controlled by the internal microcontroller according to the measured resistance, thus achieving a relatively wide measurement range and optimal measurement state without manual switching of current ranges.
3. Fast response speed. In the measurement state, the tap changer can be directly switched, and the instrument will automatically prompt, and the new resistance value will be displayed quickly.
4. Highly intelligent design, ingenious and advanced function settings, can automatically judge faults such as loose test line connections and disconnections.
5. Comprehensive protection functions, reliably protect the instrument from the impact of back electromotive force, with automatic discharge indication function.
6. Can display measurement current and measurement time.
7. Intelligent power management technology effectively reduces internal heating of the instrument.
8. Can store 120 measurement data, not lost after power failure.
9. All Chinese menu and operation prompts, intuitive and convenient.
Note: The above information and technical parameters are compiled and released by Yangzhou DARUI Electric Co., Ltd.
