Use of the clamp ammeter principle
An important part of the clamp-on ammeter is the clamp-on iron core sensor, by pressing the trigger to make the sensor open and clamp the killed wire; it can be passed through the clamp opening without having to be cut off. Through the iron core wire becomes the primary coil of the current transformer, which through the current will be in the secondary coil to sense the current. So that the secondary coil connected to the ammeter will have an indication LCD shows the current of the line under test. ETCR series clamp ammeter automatically shift, easy to operate. Clamp ammeter principle operation use
Clamp ammeter Method of use:
1, according to the measured line selection clamp ammeter level requirements, range, resolution. Check whether the jaw core is intact, there is no corrosion, jaw opening and closing is sensitive and so on.
2,Familiarise yourself with the manual before use and operate according to the requirements.
3, on-site testing, single-phase lines can be tested directly on a (line current measurement); can be the main line zero line together with the clamp (line leakage current); three-wire lines need a single test. Through the measurement
Can identify the absorption of road current, leakage current, grounding current, so as to determine whether the motor has overload phenomenon.
4, the measured circuit voltage can not exceed the value indicated on the clamp-on ammeter, otherwise it is easy to cause grounding accidents, or cause the danger of electric shock. Measured line current can not exceed the ammeter limit, such as the measured line current value is too large, need to replace a large number of range clamp meter.
Clamp ammeter tips: when testing small currents, the first will be measured circuit leads around a few times, and then clamped with the clamp meter test. The data obtained for the clamp meter reading divided by the number of turns of the wire winding. So that the measured value is more accurate
