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Product Overview：
During the manufacturing of inductive coils of transformers, mutual inductors, reactors, and electromagnetic operating mechanisms, DC resistance measurement is required in factory tests, installation and handover tests, and preventive tests of the power sector for semi-finished and finished products. It can effectively identify manufacturing defects (e.g. loosening, strand missing, broken wires in material selection, welding and connection for inductive coils) and hazards in operation. To meet the needs for rapid measurement of DC resistance of inductive coils, our company has developed theTransformerDC resistance tester based on own technical advantages. With the novel power supply technology, this product features the small size, light weight, wide test range, strong anti-interference ability, complete protection functions, and large color LCD. Entirely controlled by the single-chip microcomputer, the tester is capable of automatically carrying out self-testing and data processing, and has the functions of automatic discharge and discharge indication. It also has high test accuracy and can be operated easily to rapidly measure the DC resistance.
Product Features:
1. The tester has 6 levels of output current (maximum: 20A; minimum: <10mA), which is suitable for DC resistance measurement of a variety of transformers and mutual inductors.
2. The measurement range of the tester is0.001Ω to 20KΩ.
3. The tester has a higher response speed. The on-load tap switch can be directly enabled during measurement, and the tester will automatically refresh data.
4. The tester has the function of sound discharge alarm and clear discharge indication, to reduce misoperation.
5. The tester has complete protection functions for reliable protection against the impact of back EMF, thus achieving more reliable performance.
6. The tester is equipped with a 7-inch color LCD screen, which can display data in a clear and attractive manner. In addition, output results can be printed in a real-time manner.
7. The protection function is perfect, which can reliably protect the impact of back electromotive force on the instrument, and the performance is more reliable.
8. The response speed is fast, the instrument measurement data is stable, and the instrument automatically refreshes the data during the test.
9. Intelligent power management technology, the instrument always works in the minimum power state, effectively reducing the internal heating of the instrument and saving energy.
10. The instrument has a non-power-off clock inside.
11. The instrument has a non-power-off memory inside, which can permanently save data.
Technical parameters:
1. Output current: 20A, 10A, 5A, 1A, 200mA, 100mA, ≤10mA
2. Resolution: 0.1μΩ
3. Range: 1.0-20K Ω (≤ 10mA range)
0.1-200 Ω (100mA range)
0.05-100 Ω (200mA range)
10m Ω -20 Ω (1A gear)
5.0m Ω -10 Ω (5A gear)
1.0m Ω -2 Ω (10A gear)
0.5m Ω -1 Ω (20A range)
4. Accuracy: 0.2%
5. Working temperature: 0-40℃
6. Working humidity: <90%RH, no condensation
7. Host size: 330mm long, 260mm wide, 170mm high
8. Host weight: 5.0kg
Model
JH2820
Working power supply
220V (AC)
Output current
20A, 10A, 5A, 2A, 100mA, <5mA (6 levels for testing)
Measuring range
0.001Ω to 20KΩ
Minimum resolution
0.1u Ω
Host Weight
8.6kg
Accuracy
±(0.2% RD+0.05% FS)
Display
Large screen color LCD
