How to measure the current and voltage with a multimeter

Meter - is the most important device in every house, and the measurement of current, voltage and continuity - the three most frequently used functions of the device. And even these seemingly simple operation can cause trouble. In this article I will discuss how to measure the current and voltage with a multimeter.

multimeter

Detail all the features of a multimeter I examined in this articleHere only briefly discuss the necessary options.

Of all the diversity we are with you will need only the ability to measure AC and DC component (red circle circled number 1) and the current measurement (circled in red circle at No. 2).

As a measuring device I use a proven and well-established Multimeter MASTECH MY68.

Simultaneously or sequentially

Before proceeding to the direct measurements, let us remember (remember) the basic rules of the current and voltage measurement.

The current intensity measured by ammeter in series connection circuit:

The voltage measured by the voltmeter in parallel connection circuit:

Refreshing this knowledge, we can move on.

check the voltage

So, in order to successfully complete the test voltage, test leads is set as follows: the black plug into the socket COMAnd the red lead into the connector VΩFCx.

AC voltage

Let's start with the most simple, namely to test voltage. To check the voltage meter and take control with the help of exhibit:

In my case, the instrument automatically determines the limit of the measurement, if you have a different device, you expose the following provision:

Important. Always choose a limit of measurement on the multimeter is higher than the measuring device. Even if you do not know about any voltage in magnitude to be measured, the expose on the multimeter the maximum limit.

Now insert the ends, for example, into a socket and observe the readings.

In this case, a probe which slot you put no role.

Measurement of the DC voltage

So, now let's make check of the DC voltage, for example, regulated power supply.

To translate this position regulator V-, and select the measurement limit (or expose the maximum) and still attach the probes.

Of course, the polarity when measuring DC voltage is important. But even if you mix up the ends of the seats and touch the plus minus or vice versa, the meter still calculates voltage and displays it only with a negative sign.

The most important rule when measuring voltage - is to choose the measuring range, so if you are not sure that the case will be 12 volts instead of 24 volts, it is better to put a limit of measurement of 600 volts, and then, if necessary reduce it.

Current measurement

D.C

Now let's take a measurement DC. The first thing on the multimeter is necessary to change the position of the red lead, and if you also do not know what will be the approximate value of the current, then choose the maximum value. In my case it is 10 Amps. Then the regulator moved to "A " the selected measurement limit:

Then we need to connect the meter in a sequential manner in a circuit where it is necessary to measure the current value.

Now just turn on the power supply and observe the indications on the appliance is.

Alternating current

If you want to make the measurement of alternating current value, the multimeter to select the required position control, and the rest of the procedure is completely identical to the above.

Note. I interested in my multimeter? You can buy the same here.

conclusion

Here in this uncomplicated way a voltage is measured and the current through the meter. If the article was useful to you, or are interested in, you will appreciate it Like. Thank you for your valuable attention!