1, according to the measured line to select the 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,Familiarize 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

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. The 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.