Wiring and measurement steps of loop resistance tester:

1. According to the four-wire measurement method, use special test wires (voltage test wires and current output wires) to connect the test product to the instrument.

2. Short press the button in the shutdown state, the LCD backlight will light up, display the historical record serial number, and then display the historical record resistance value, the display time is 10 seconds; short press the button within 10 seconds, you can query the resistance measurement value of qian100 times in reverse order of time (The query hold time is 10 seconds).

3. Press and hold the measurement button in the state of shutdown or historical record query, the buzzer will beep once, and the instrument will turn on and enter the startup screen.

4. The default test state is 50A current test for 1s after power-on. Short press the time button and current button to switch the time and current positions, short press the measurement button, the buzzer will beep once, and the LCD displays "Measuring", press Set the measuring current and measuring time to measure once, the buzzer will beep once at the end of the measurement, and the LCD will display the resistance value.

5. When the time scale is 1s, double-click the measurement button to switch between manual mode and automatic mode. The LCD displays "Auto". During the measurement, the buzzer will continue to beep for short, long beep once, and once for measurement. After 3 times of automatic measurement, it will automatically exit, and the LCD will display "Manual".

6. Press and hold the button in the non-measurement state when the machine is turned on, the buzzer will beep until the button is released, and the shutdown screen will be entered and the instrument will shut down.