DC resistance tester measurement current is usually: 1A, 3A, 5A, 10A, 20A,
DC resistance tester measurement current is usually: 1A, 3A, 5A, 10A, 20A, 30A and other different measurement gears. The instrument consists of a constant current power supply and a voltage signal detection part, with five-digit LCD digital display. The output current gear is adjustable, suitable for DC resistance measurement of various small and medium 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 department. It can effectively detect manufacturing defects such as poor material selection, welding, loose connections, missing strands, broken wires in transformer coils, and hidden dangers after operation.
The DC resistance tester is a new generation of transformer DC resistance testing instrument. 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 has a built-in non-volatile memory that can save 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 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 below 3 digits. It comes standard with a temperature compensation function, which can accurately test meter resistance. Three current modes can meet various stringent resistance testing requirements.
The transformer DC resistance tester is a new instrument designed for measuring the DC resistance of large-capacity transformers. It is composed of an integrated high-precision constant current source and test part. The test process is controlled by a microcomputer, automatically completing constant current 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 difficult to read in sunlight. It also has an automatic arc suppression function. This instrument has the advantages of fast measurement speed, high precision, intuitive display, strong anti-interference ability, small size, low power consumption, stable and reliable test data, and is not affected by human factors. The instrument has a built-in rechargeable battery pack (12V), can be used with both AC and DC power, and is convenient for on-site and field testing.
Functions and Features
1. Uses a high-speed 16-bit A/D converter, with stable measurement data and good repeatability.
2. Automatic program-controlled current source technology. The current source has a total of 1000 current gears, automatically controlled by the internal microcontroller according to the measured resistance, thereby achieving a relatively wide measurement range and the best measurement state, without the need for manual current gear switching.
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 soon.
4. Highly intelligent design with ingenious and advanced function settings, which can automatically judge faults such as loose test line connections and broken wires.
5. Complete protection functions, reliably protecting the instrument from back electromotive force impact, 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, which will not be lost after power failure.
9. All Chinese menus and operation prompts, intuitive and convenient.
