How to use the loop resistance tester

1. According to the four-wire measurement method, use a special test wire to connect the tested object to the panel of the instrument. Note that the voltage measurement wire should be connected to the inside of the current output wire.

2. Turn on the AC220V power supply (note: the third wire of the incoming power supply, that is, the protective ground must be connected to the ground), press the power switch, and the ammeter and resistance meter display "000" beat).

3. Press the measurement switch, adjust the current output knob (clockwise) until the current meter shows "100.0", then read the number on the resistance meter, which is the resistance value of the tested product, and record it. (If "1" is displayed, it means that the measured circuit is out of range).

4. After the test, turn the current output adjustment knob (counterclockwise) to the minimum, reset the measurement switch, and then cut off the power switch.

5. To repeat the test, simply reset the measurement switch, re-clamp the test clamp, and then press the measurement switch.

Precautions for using the loop resistance tester

1. Before turning on the power switch, the test button should be popped up (in the non-test state), and the current adjustment button should be adjusted counterclockwise to "zero position".

2. The instrument should be placed in a dry, ventilated room without corrosive gas.

3. After the test, be sure to wait for the power supply to be fully discharged before removing the test line and other devices.

Features of Loop Resistance Testers

1. High current: The loop resistance tester adopts the latest power supply technology, which can continuously output large current for a long time, overcomes the drawbacks of the instantaneous current of the pulsed power supply, and can effectively break down the oxide film of the switch contacts and obtain good test results.

2. Strong anti-interference ability: under severe interference conditions, the last digit of the LCD screen can be stabilized within the range of ±1 word, the reading is stable, and the repeatability is good.

3. The circuit resistance tester has a long service life: all high-precision resistances are used to effectively eliminate the influence of ambient temperature on the measurement results

4. Easy to carry: small size and light weight