The DC Resistance Tester (micro-ohmmeter) is a high-precision replacement product for the traditional single and double-arm bridges. It adopts advanced switching power supply technology and displays measurement results via a dot-matrix LCD. It overcomes the disadvantage of other similar products where LED displays are difficult to read in sunlight, and also features an automatic arc suppression function.
Chinese Name
DC Resistance Tester
English Name
DC Resistance Tester
Frequency
50Hz±5%
The DC resistance tester is also known as DC resistance measuring instrument, DC resistance meter, transformer DC resistance tester, etc.
Overview: DC resistance testing is an essential test item for transformers after handover, major repairs, and changes to tap changers. Traditionally, measuring the DC resistance of transformer windings and high-power inductive equipment using methods like the bridge method and voltage drop method is time-consuming and labor-intensive. To change this situation, this instrument was developed to shorten measurement time and reduce the workload of test personnel. With high-speed microprocessor control as the core, built-in rechargeable battery and charging circuit, and adopting high-speed A/D converter and programmable power supply technology, it achieves 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 charging and discharging speeds. This instrument is compact, lightweight, and portable. It offers rapid measurement, ease of use, and high measurement accuracy. The self-test and auto-calibration functions reduce the difficulty of use and maintenance, making it an ideal device for measuring DC resistance of transformer windings and high-power inductive equipment.
The DC resistance tester typically provides measurement currents such as 1A, 3A, 5A, 10A, 20A, 30A in different ranges. The instrument consists of a constant current power supply and a voltage signal detection part, with five-digit LCD display. The output current range is adjustable, suitable for DC resistance measurement of various small and medium-sized transformers.
