(1) the voltage of the line to be measured shall be lower than the rated voltage of the clamp table.(2) when measuring the current of the high voltage line, wear insulating gloves, wear insulated shoes and stand on the insulating pad.(3) the jaws should be closed tightly and can not be electrified.
Clamp current meter high, low two, for without dismantling the current in the circuit fault line under the condition of direct measurement. The following methods: (1) the use of high voltage clamp meter should be paid attention to when the voltage clamp current meter, prohibit the use of low voltage electric current clamp meter high voltage measurement circuit. With high voltage clamp meter measurement, by the two person operation, non duty measurement should fill in second working ticket, should wear gloves when measuring stand on the insulating mat, must not touch the other equipment, to prevent a short circuit or grounding. (2) the observation time, we must pay special attention to keep a safe distance from the head and charged part of the human body and any part of the charged body distance shall not be less than the entire length of the clamp meter. (3) measurement in high voltage circuit, prohibit the use of lead from the clamp ammeters another meter measurement. When measuring the phase current of high voltage cable, the distance between the cable head and line should be above 300mm, and the insulation is good, which can be carried out when the measurement is convenient. (4) when measuring low voltage fusible fuse or horizontally arranged low voltage bus current, each phase shall be protected or insulated by insulation materials, so as to avoid interphase short circuit. (5) when a cable is connected, it is strictly forbidden to measure. To prevent the breakdown of the ground due to the low insulation level of the cable head, and endanger personal safety. (6) after the end of the clamp current meter to measure the switch to the maximum file, so that next time use careless flow; and should be kept in a dry room. Clamp ammeters also called clamp table, Taiwan more named hook table.
Clamp meter is clamped in the wire, cut off the circuit state, current detection convenient testing instrument (also known as nondestructive measurement).Analog pointer multimeter and digital multimeter is current detection circuit is cut off, and the clamp meter just caught in the electric wire sheath, current can be detected. The operation is simple, do not need to test large current circuit can be directly connected to safety.Clamp meter, multimeter and insulation resistance meter are analogue and digital two.Standard range of detection: AC, DC are in the 2A to 200A or 400A or so, there are products that can detect 2000A high current;Another can detect the number of mA small current leakage detection products, and can detect transformer power, switching power supply sine wave other than the true value of sine wave (True, RMS) products. 1: detection objectAccording to different detection objects, alternating current, DC current, or leakage current, to choose the type of aircraft;
