How to use the multimeter? Video instruction
Multimeters are designed to measure voltage, current, capacitance and resistance in the first place. Many expensive models of these devices are also able to measure temperature, measure the gain of transistors, as well as the mode of checking diodes, determining the short circuit in the network. With the help of new generation capacitors, it is easy to measure the capacitance of the capacitor and the inductance of the coil.
Use the multimeter with special probes, wires in its kit. The peculiarity of using inexpensive multimeters can be called that before starting their operation, it is necessary to fix the entry points of both wires with electrical tape. Otherwise, the wires can fall off, since they are very weakly fixed.
Device description
If you want to learn how to use a multimeter, first you need to understand its device.
At the top of any multimeter is a digital scoreboard. Usually it can display up to four digits and is seven-segment. The scoreboard displays the measurement results, in addition, it also contains information on the battery status of the instrument.
On most devices under the scoreboard there is a button Hold and Back Light. Hold allows you to keep the last measurement in the memory of the device, and Back Light serves to illuminate the screen if necessary.
The back of the enclosure should have a leg that can be leaned on the appliance if necessary. The device is powered by a 9 V battery, which is located under the lid. Also there is a fuse, which should provide protection from failure.
How to use the
digital multimeter Before starting any measurements, you must connect the probes correctly. This is done like this:
- The main wire, indicated in black, is always a minus. Therefore, it must be connected to the socket labeled "COM" on the back of the multimeter.
- The red wire indicates a plus, it is connected to the right of the black one.
- On the left there is a socket, which is designed to measure current up to 10 A. This is done without a fuse, so if you use improperly, it is possible to burn the device.
Also on the reverse side of the device the general limit of the device operation is indicated. For example, it is often 600V.
How to use a digital multimeter and correctly set the measurement limits of the
It should be immediately indicated that if you are going to measure the current or voltage in an instrument that does not know these values in advance, then you must set the maximum measurement limit. Otherwise, the multimeter can quickly fail. Only after the first measurements, which showed that the numbers are too small or inaccurate, you can switch the measurement limit to a lower one.
If you are interested in how to use a multimeter, you should be aware that the main task in its operation is the correctly installed switch. By default, it is set to "off", that is, the device is not working. The user himself will move it to the desired value, depending on what he plans to measure.
To measure a direct current, for example, a conventional galvanic battery, it is necessary to attach the probes to its ends. At the same time, knowing that the battery has a constant current of about 3 - 3, 5 V, we can say that the measurement limit should be set higher. To the plus of the battery, we apply plus, and to the minus - minus. The display will show the current value.
Now you know how to use digital measurements and how to conduct all simple measurements.
