Selection of clamp-on multimeters and digital multimeters
Clamp meter, also known as clamp multimeter, can directly measure the current in the line without dismantling the equipment line. To measure current with an ordinary multimeter, it is necessary to string the black and red pointer of the multimeter in the line to measure the current. However, clamp-on multimeters generally cannot measure small currents. If you often need to measure the analog 4-20mA output and power supply voltage of the equipment, it is better to need an ordinary digital multimeter.
Clamp meters are not very useful to us in our daily life. They are mostly used by professionals in the electric power industry, while an ordinary digital multimeter can be used as a spare. In daily life, you will always have a place where you need to use it.
An ordinary clamp multimeter has AC current gears, resistance gears, diode and buzzer gears, and AC and DC voltage gears.
An ordinary digital multimeter, its measurement function not only completely covers all the functions of the clamp multimeter, but also has more functions that the clamp multimeter does not have.
What is the difference between a clamp multimeter and a digital multimeter?
1. The difference in use: the use of the clamp multimeter does not need to be in contact with the wire core of the measuring wire, while the digital multimeter needs to contact the wire core. In terms of the measurement results of the two, the value of the digital multimeter is more accurate, and the clamp multimeter is more convenient to operate.
2. The number of functions: Clamp multimeter can be said to be a kind of measuring instrument derived from the digital multimeter. Although the function is not as good as the digital multimeter, it can do some jobs that the digital multimeter cannot do.
3. Main measurement objects: Clamp multimeters are mainly used for AC current equipment or circuit measurement, and the measurement objects of multimeters include almost all electrical equipment, electronic components and instruments.
4. Measurement accuracy: The measurement accuracy of the clamp multimeter is not high, and it can only make a rough judgment on the operation of the equipment or circuit. A better multimeter will do the trick for accurate measurements.
5. Measurement limitations: The clamp-on multimeter cannot be used in high-voltage electrical equipment or circuits, and the multimeter can measure thousands of volts.
In the process of industrial production, it is basically a continuous operation. Some low-voltage equipment or circuits need to know the current situation. It is impossible to disconnect it and connect it in series with a multimeter to measure the current. This will affect production or cause inconvenience. necessary loss. Therefore, in order to measure the current without disconnecting the circuit, a clamp-on multimeter is derived on the basis of the multimeter. Although it is not as accurate as a multimeter, it can provide an effective reference standard for maintenance personnel.
Both clamp-type multimeter and ordinary multimeter are a kind of measurement tools, which are necessary test tools for electronics enthusiasts, major electronics universities, electronics companies, etc. The accuracy of test data can effectively improve work efficiency. Same point:
1. Both can test data such as current, voltage, resistance, capacitance, frequency, etc., and have different functions according to different specifications, for example, some can also measure, and some have wireless functions.
2. The specifications must be followed during the test. Different test files should be selected for different data, and the appropriate range should be selected for a large test volume.
Similarities and differences:
The main difference between a clamp-type multimeter and a digital multimeter is the measurement of current. For a clamp-type multimeter, when measuring current, you only need to use two clamps to clamp the current of the wire to be measured to measure the current. And it can be measured without interruption of power, which is convenient and fast; when a digital multimeter measures current, it needs to connect two test leads in series into the circuit, and this kind of measurement needs to be powered off first, which is not as convenient as a clamp-type multimeter.
