Conductivity Resistance Tester

This tester is developed in accordance with the National Standard GB/T3048-2007 "Test Methods for Electrical Properties of Wires and Cables," Part 4: "Direct Current Resistance Test of Conductors," and refers to the relevant provisions in Part 2: "Resistance Rate Test of Metallic Materials." It is mainly used for testing the direct current resistance of large cross-sectional conductors and can also be used as a 100A (up to 120A) direct current standard source independently. Its composition includes a 0.05-level direct current standard source, a resistance voltage drop measurement board, and a control microcontroller.

The measurement board employs a C8051F350 microcontroller with a 24-bit ADC. The ADC features an integral non-linearity of ±15ppm FS (full scale) and a gain error of ±0.002% after calibration.

The display features a 5.7-inch color LCD screen, with clear chart character display.

Note:

1. The recommended test current value is applicable to a 1M long copper conductor. For aluminum conductors, the current value should be halved.

2. If the cross-sectional area (mm²) of Rx is known, you can manually select the input current around 0.6A/mm², but only up to 120A for high currents.

For selected current ≤ 60A, if necessary, take 1.41 times the current and measure again.

Current Source Technical Specifications

Current Range (In): 100A, 20A, 2A

Output Capacity: Each range is not less than 1.5V

Adjustment Range: 0～120% (In)

Fine Diameter: 1×10^-4

Accuracy: ±(0.04RD + 0.01RG)% (RD = Reading, RG = Range) (100A, 20A, 2A)

Load Adjustment Rate: ≤ ±0.01% RG

Power Supply: Single-phase 220V ±10%, 50Hz ±5%

Operating Environment: Temperature 20℃ ± 10℃, Relative Humidity ≤ 85% RH

Dimensions: 460×460×175mm³

Weight: Approximately 13 kg