Loop Resistance Tester

According to the new preventive test regulations for power equipment, the resistance test of the conductive circuit of various switchgears is a necessary test item; the test current shall not be less than 100A, and the continuous current time shall not be less than 1 minute. In this regard, our company has designed and developed a new generation of loop resistance tester products, suitable for testing the primary contact resistance of high- and low-voltage switches, the DC resistance of high- and low-voltage cable lines, etc. The loop resistance tester has a 100A constant-current output, which can be used with a smaller section of the test line, reducing the labor intensity for field testers. The test data is displayed on a dot-matrix LCD with a backlight, suitable for various working environments.

Functional characteristics

Constant current output, open circuit voltage up to 10v;
The instrument output current is big, the weight is light;
It has perfect protection circuit and high reliability
With test time setting function, meet the requirements of the provisions;
Built-in high-capacity Non-volatile random-access memory: Can Store 500 sets of test data;
Built-in USB controller: test data can be saved to USB disk and stored permanently in PC;
Built-in high-precision real-time clock function: Date and time calibration;
The instrument comes with a high-speed micro thermal printer that prints measurements and historical data.

Technical parameters

Output current 100A/50A
Open circuit voltage 10V
Measurement Time Auto, 15s, 30s, 45s, 60s optional
Measurement range 0ー19.99 m ω/99.99 m ω
Resolution 0.1 μω
Measurement accuracy ± (0.5% read + 2 words)
Dimensions 300 mm × 230 mm × 220 mm
The weight of the instrument is 7 kg

Conditions of use

Ambient temperature -10 °cー50 °C
Ambient humidity ≤85% Rh
AC220V ± 10%
Power frequency 50 ± 1 Hz

Introduction to the panel

1. I+, I-: Current output terminals.

2. U+, U-: Voltage input terminals.

3. AC220V: The main power input port for the entire device, equipped with an AC socket, fuse compartment, and switch.

4. Grounding Terminal: Used for grounding the equipment chassis, serving as a protective ground.

5. LCD Screen: A large liquid crystal display that shows current and resistance values.

6. Keyboard: Confirm Key – After selecting an option, press this key to execute the corresponding command. When modifying parameters, press this key to exit parameter adjustment.

Reset Key – Press the reset key at any time to return the instrument to its initial state.

Select/Print Key-Cursor reverse selection, numerical value selection, or for printing measurement data.

7. RS232: Used for data communication between the instrument and a PC or for software upgrades.

8. USB: Used to connect a USB flash drive for data storage.

9. Printer: Thermal printer, used for quickly printing various measurement data.