DC resistance tester measurement current usually: 1A, 3A, 5A, 10A, 20A,
DC resistance tester measurement current usually: 1A, 3A, 5A, 10A, 20A, 30A and other different measurement gears. The instrument consists of a constant current power supply and voltage signal detection, with five-digit LCD 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 sector. 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.
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, discharge indication, and a built-in non-volatile memory that can save measurement data for a long time. The use of LCD display makes the instrument have a good human-machine interface, making it the preferred equipment in DC resistance testing work.
DC resistance tester is a high-precision, wide-range resistance tester controlled by a high-performance microprocessor. It can test resistance 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 0.05% accuracy, and the reading fluctuation can be controlled below 3 digits. It comes standard with temperature compensation function, which can accurately test meter resistance. Three current modes can meet various demanding resistance testing requirements.
Transformer DC resistance tester is a new instrument designed for measuring the DC resistance of large-capacity transformers. It is composed of a high-precision constant current source and test part integrated into one. The test process is controlled by a microcomputer, automatically completing constant current judgment, data acquisition, data processing, resistance display, and printing.
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 100 times faster than the 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 automatic arc suppression function. This instrument has advantages such as 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 is equipped with a rechargeable battery pack (12V), dual AC/DC power supply, convenient for on-site and field testing.
Functions and Features
1. Uses high-speed 16-bit A/D converter, stable measurement data, and good repeatability.
2. Automatic program-controlled current source technology, with a total of 1000 current gears set in the current source, automatically controlled by the internal microcontroller according to the measured resistance, thereby achieving a relatively wide measurement range and optimal 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 quickly.
4. Highly intelligent design, with ingenious and advanced function settings, 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 reducing internal heat generation of the instrument.
8. Can store 120 measurement data, not lost after power failure.
9. All Chinese menu and operation prompts, intuitive and convenient.
