Selection Guide for Multimeter High Voltage Probes
The multimeter is a common electronic measuring instrument, which is widely used and has become an essential tool for electronics enthusiasts. However, when people use the multimeter, most of them only realize the function of the multimeter itself, and do not give full play to the function of the multimeter. This article starts from some small accessories of the multimeter, and tells how to greatly improve the function of the multimeter through these small accessories.
Speaking of the test accessories of the multimeter, it is common for people to see the standard accessories when the multimeter is purchased at random, such as the multimeter pen line and the sheath. In fact, as long as we are diligent and good at discovering, the multimeter will have some "interesting" small accessories that enhance its functions and improve its ease of use. It doesn’t matter if you don’t understand it, but you will be surprised after you understand it. Some test accessories will make you get twice the result with half the effort, that is, the multimeter pen, which is also very particular.
1. How much current is measured by the multimeter-current probe
The multimeter was also called a multimeter at the earliest, and it was developed on the basis of the traditional three-purpose meter. The most basic of the so-called "three functions" is the measurement of voltage, current and resistance. The most typical three-quantity relationship in Ohm's law is U=R×I. However, the general multimeter can only measure the current to 20A, and it needs to disconnect the circuit and test it in series in the circuit, which is inconvenient and not safe. Using a current probe can solve this problem. It adopts the principles of AC transformer, DC Hall effect, or Rogowski coil, and can measure large currents up to 3600A peak current with a clamp structure without disconnecting the circuit.
