Instructions
When using a clamp-type ammeter to detect current, be sure to sandwich one wire (wire) under test. If two (parallel wires) are sandwiched, the current cannot be detected. In addition, when using the center (iron core) of the clamp-type ammeter to detect, the detection error is small . When checking the power consumption of home appliances, it is more convenient to use a line separator. Some line separators can amplify the detection current by 10 times, so the current below 1A can be amplified and then detected. Use a DC clamp ammeter to detect the DC current. (DCA), if the current flows in the opposite direction, it will show a negative number. This function can be used to detect whether the car's battery is charged or discharged.
True RMS detection
The average value type clamp ammeter detects the average value of the sine wave by AC detection, and displays the value after magnifying 1.11 times (sine wave AC) as an effective value. It is also displayed after being magnified by 1.11 times, so there will be an indication error. Therefore, when detecting waveforms other than sine waves and crooked waves, please use a clamp-on ammeter that can directly test the true RMS value.
Leakage detection
Leakage detection is different from the usual current detection, two (single-phase 2-wire type) or three (single-phase 3-wire type, three-phase 3-wire type) should be clamped all together. It can also be tested by clamping the grounding wire. The insulation management method for detecting leakage current on low-voltage circuits has become the primary means of judgment. In the factory, the leakage current clamp meter is gradually used for detection.
Precautions for use
①When measuring the current, the position of the carrier fluid to be measured should be placed in the center of the jaw to avoid errors.
②Before measuring, you should estimate the size of the current to be measured, and select the appropriate range. When you do not know the current size, you should select the largest range, and then reduce the range appropriately according to the pointer, but you cannot switch the range during measurement.
③In order to make the reading accurate, the jaws should be kept clean and undamaged. If there is any dirt, it should be cleaned with gasoline and then measured.
④When measuring the current below 5A, in order to measure accurately, it should be measured in a circle.
⑤ The clamp meter cannot measure the current of bare wires to prevent electric shock and short circuit.
⑥After the measurement, be sure to put the range division knob to the maximum range position.
