When using a clamp-type ammeter to detect current, be sure to sandwich one conductor (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 enlarged 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
Different from normal current detection, leakage detection requires two (single-phase 2-wire type) or three (single-phase 3-wire type, three-phase 3-wire type) to 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.
