1. Overview

WJJC-100A loop resistance tester is a high-precision, digital switch testing instrument carefully developed by the company according to IEC standards and the latest power implementation standard DL/T845.4-2004 of the People's Republic of China. The instrument adopts high-frequency and high-power constant-current switching power supply technology, which can measure micro-ohm-level contact resistance. It is widely used in the measurement of contact resistance, loop resistance and contact resistance of cables and wires and welds of various switches and electrical appliances, and the measurement data of the instrument is accurate and the performance is stable, which meets the requirements of on-site high-voltage switch maintenance and loop resistance test of high-voltage switchgear factory in the electric power and power supply departments. The output current and measurement resistance are output on the seven-inch high-brightness touch color liquid crystal at the same time, and the measurement results can be output voltage or stored in U disk, and the power-down storage can meet the data query at any time.

Second, performance characteristics

1. The instrument can be controlled by special software throughout the process, and the test data can be stored and uploaded for easy reference.

2. It has a variety of protection functions such as back EMF impact, wire disconnection and power failure during the test, power overheating, etc., which can reliably protect the impact of back EMF on the instrument, and synchronize the sound alarm.

3. Intelligent power management technology, the instrument always works in the minimum power state, which effectively saves energy and reduces heat generation.

4. The output voltage is high and the measurement range is wide.

5. The test current comes from the high-precision high-current constant current power supply, without manual adjustment, and the test is fast and accurate.

6. The four-terminal wiring method is adopted, which effectively excludes the influence of the test line resistance on the test results.

7. Seven-inch high-brightness touch color LCD, clear display under strong light, full touch screen operation, free switching between Chinese and English

8. The instrument comes with a perpetual calendar clock and power-down storage, which can store 1000 sets of test data and consult it at any time

9. The instrument has Bluetooth communication, RS232 communication and USB interface, which is used for computer communication and U disk data storage.

10. It comes with a panel micro printer, which can print measurement results in Chinese.

3. Technical indicators

Test current: 50A, 100A

Range: 100μΩ~100mΩ(50A) 10μΩ~50mΩ(100A)

Resolution: 0.1 μΩ min

Accuracy: ± (0.5%±0.3μΩ)

Power: 1000W

Working mode: continuous measurement

Power supply: AC220V±10% 50HZ

Operating temperature: 0~40°C

Relative humidity: less than or equal to 90% without condensation

Dimensions: host 360*290*170(mm) wire box 360*290*170(mm)

Weight: 5.5KG for the main machine and 6.9KG for the wire box

Test line length: 10 meters as standard The length can be customized