Clamp ammeter principle operation and use
The important part of the clamp ammeter is the clamp iron core sensor, which can be opened and clamped by pressing the trigger to clamp the killed wire; it can pass through the clamp opening without cutting. Passing through the iron core wire becomes the primary coil of the current transformer, and the current is induced in the secondary coil through the current. Thus, the ammeter connected to the secondary coil will indicate the LCD to display the current of the line under test. ETCR series clamp ammeter is automatic shifting, easy to operate. Clamp ammeter principle operation and use
How to use clamp ammeter:
1. Select the level requirements, range, and resolution of the clamp ammeter according to the conditions of the tested line. Check whether the iron core of the jaws is intact, whether there is rust, whether the opening and closing of the jaws are sensitive, etc.
2. Before using, you should be familiar with the instructions and operate according to the requirements
3. During on-site inspection, one single-phase line can be tested directly (line current measurement); the main line and zero line can be clamped together (line leakage current); three-wire lines need a single detection. by measuring
It can judge the absorbing circuit current, leakage current and grounding current, so as to judge whether the motor is overloaded
4. The voltage of the circuit under test cannot exceed the value marked on the clamp ammeter, otherwise it may easily cause a grounding accident or cause an electric shock hazard. The current of the line under test cannot exceed the limit of the ammeter. If the current value of the line under test is too large, it is necessary to replace the large-range clamp meter.
Tips for using the clamp ammeter: When testing a small current, first wind the wire of the circuit under test a few times, and then use the clamp meter to clamp the test. The data obtained is the reading of the clamp meter divided by the number of turns of the wire. In this way, the measured value is more accurate
