The KDHLS-100 handheld circuit resistance tester uses high-power switching power supply technology and electronic circuits. Loop resistance tester is a special test instrument for high and low switch, cable and wire and weld contact resistance. The current of the loop resistance tester adopts the standard DC recommended by the national standard GB736, and can measure the resistance value of the subject under the condition of the standard current. The loop resistance tester has the characteristics of small volume, light weight, strong anti-interference ability, high precision, easy operation, perfect protection function and so on. Using lithium battery power supply, small shape, easy to carry, fast test speed, convenient for users to use. The output current is large, and the output time is up to 60 seconds. A wide range of electrical switch contact resistance, circuit resistance, weld contact resistance measurement.
 
KDHLS-100 circuit resistance tester is also known as circuit breaker conductive circuit. It is used to detect the electrical conductivity, which plays an important role in ensuring the safe operation of the switch. The conductive performance can be reflected by the size of the conductive circuit resistance. Therefore, IEC standards and manufacturers stipulate that the loop resistance should be measured, and there are clearly specified indicators for the loop resistance of various forms of switches. In the past, double-arm Bridges were used. Since the voltage and current of the bridge are relatively small, when there are impurities between the static and static contacts of the switch or there is oxidation on the surface, the test data is relatively dispersed. At the same time, the anti-interference of the bridge is poor, so the national standard stipulates that more than 200A DC current is used for testing. Loop resistance tester is a test instrument developed by our company to meet the requirements of GB50150-2006 and DL/T 845.4-2004 regulations. It is widely used in the measurement of contact resistance, loop resistance, cable and wire, weld contact resistance of various electrical switches.

Product characteristics
1. The instrument has the characteristics of small volume, light weight, strong anti-interference ability, high precision, easy operation, perfect protection function and so on.
2. Using lithium battery power technology.
3. Using the precision instrument operational amplifier and high precision quadruple integration A/D converter, combined with high performance 16 bit single chip microcomputer, the system automatically switches the magnification according to the signal size, which ensures the test accuracy of the product.
4. The test current comes from the high-precision 100A switching constant current power supply, and the test is fast and accurate without manual adjustment.
5. The four-terminal connection method is adopted to effectively eliminate the influence of the test wire resistance on the test result.
6. Data storage and historical data browsing function, can store 100 groups of data, and has power failure protection function.
7. The test current is large and meets the requirements of the national standard for testing contact resistance.
8. Equipped with overheat protection circuit, the instrument is reliable and stable.
9. Man-machine dialogue full keyboard operation mode, intelligent work process.
10. Easy to operate, light weight.

Technical index
1. Test current: 100A
2. Measuring range: 0 ~ 2mΩ
3. Minimum resolution: 0.1uΩ
4. Accuracy: ±0.5% reading ± 5 words
5. Output time: 1 second, 3 seconds, 10 seconds, 30 seconds, 60 seconds
6. Battery charging time: 8 hours
7. Can store 100 groups of data
8. It can be used 400 times on a single charge
9. Bluetooth communication (optional)
10. Size: 240mm*150mm*40mm
11. Weight: 1kg