How to measure current with a multimeter?
First you need to understand how this device works. Let's start with the notation on the multimeter. On any device there is always:
- Resistance icon. Shows the mark on which to place the pointer. Here is the range of resistance. It usually ranges from 0 ohms to 200 mohms.
- Continuous current. Indicates where to put the switch. The approximate range of measurements: 0 - 1 kA.
- Similar icon for alternating current. Measurement range - 0 V - 750 A.
- The icon for measurement of DC and AC voltage. Measures voltage within 20 V.
- Diode dialer. Its peculiarity is that at a resistance value of up to 100 ohms, a dithering signal is heard from the multimeter.
When answering the question how to measure the current with a multimeter, it must be said that the probes are connected in series with the load. After that, the handle is placed on the corresponding icon, in this case it is direct current.
For example, the load is the fan from the computer. Then one who is interested in how to measure the current with a multimeter should put on the screen 12 V and twist the DC stick. On the device, set the current limit to 20 A.
First you need to check the device on some device, the current strength in which is known in advance. For those who already know how to measure the current with a multimeter, it will be very simple to do this.
Normally, those who know how to measure alternating current with a multimeter, connect the device to one of the breaks of the device's phase wires. When measuring the frequency of the current, it should be taken into account that if the current is more than 200 mA and a special terminal is provided for it, the probe should be rearranged.
How does the multimeter measure resistance?
As part of any multifunction multimeter there is always an ohmmeter. With its help, resistance is measured. With the help of this device, it is easy to recognize the resistance of a network, an electrical circuit or a resistor. In addition, the measurement of the resistance allows you to check the integrity of many elements of the electrical network - resistors, transformers, fuses, inductors, etc. By measuring the resistance with a multimeter, you can also check the performance of capacitors, detect transient transitions, determine the integrity of electrical connections.
When answering the question how to measure the resistance of a resistor with a multimeter, first you need to select a section with an omega badge designation. If you do not know how to measure the resistance in the network, start by roughly determining its size in the measured network. When setting the measurement limit, make sure that it is greater than the assumed resistance of the resistor.
Knowing how to test resistance with a multimeter, you can easily avoid many breakdowns of network elements. When carrying out measurements, one should not touch the probes and other live parts of the device with the hand, since the device will measure the resistance of your body, and therefore the result will be incorrect. The video shows the measurement process in detail.
The ability to work with this device is important for those who want to learn how to measure the ground resistance of a multimeter. Knowing the grounding resistance can easily avoid many difficulties in work.
