Essence of Hohhot 100A DC Resistance Tester​



Safety Measures



1. You must read this manual carefully before using this instrument.



2. The instrument should be used away from rain, corrosive gases, and other such environments.



3. The instrument should avoid severe vibration.



4. Maintenance and debugging of the instrument should be carried out by professionals.



5. After testing, be sure to wait until the discharge alarm sound stops before turning off the power and removing the test leads.



6. When measuring no-load tap-changing transformers, be sure to wait until the discharge indication alarm sound stops before switching gears.



7. During the test, it is forbidden to move the test clamps and cut off the power supply line.



Performance Features



1. The whole machine is controlled by a high-speed microcontroller, with a high degree of automation and simple operation.



2. It adopts high-frequency switching power supply technology, with a large output current, suitable for DC resistance measurement of large and medium-sized transformers.



3. It has complete protection functions, which can reliably protect the instrument from the impact of back electromotive force, making the performance more reliable.



4. It has audible discharge alarm, clear discharge indication, reducing misoperation.



5. It has fast response speed, and can directly switch the on-load tap changer in the measurement state, and the instrument automatically refreshes the data.



6. It adopts a vertical case structure, which is convenient for field use.



7. With intelligent power management technology, the instrument always works in the minimum power state, effectively reducing internal heating and saving energy.



8. Dot matrix LCD, Chinese menu, print output.







Essence of Hohhot 100A DC Resistance Tester​



Technical Indicators



1. Output current: 5A, 10A, 20A, 40A, 100A



2. Range:   10μΩ～100mΩ     (100A)



            50μΩ～500mΩ     (40A)



          　100μΩ～1Ω        (20A)



　　　　　　　　500μΩ～2Ω        (10A)



       1mΩ ～ 4Ω         (5A accuracy: 0.2%)



3. Resolution: 0.1μΩ



4. Working temperature: 0～40℃



5. Ambient humidity: ≤90%RH, no condensation



6. Working power supply: AC220V±10%, 50HZ±1HZ