How To Use Electric Multimeter

In electric-electronics, besides gauges, multimeter is indispensable tools for the technicians. It is used to measure voltage, current, resistance, capacitance, diode test (diode), tran-si-meter (transistor) .. v..v.. we call this instrument is multimeter, there is a place called VOM (pronounced Car-em Vegas).

Multimeter is a measuring instrument indispensable to any electronic technician, the best multimeter 2016 has 4 main functions of the resistor measurement, measuring DC voltage, AC voltage measurement and amperage.

The advantage of measuring the clock is fast, check a lot of components, see the release of the load capacitor, but this clock has limited accuracy and low impedance about 20K / Vol due fins when on the circuit for measuring low flow pressure drop they are.

Multimeter Typically Include 2 Types

Type displayed by the needle and the type displayed by number.

Each watches with its own pros and cons, this article aims to guide use this useful device and help you discern strengths and weaknesses of each type.

Multimeter display format needle.

Measuring voltage: For two kinds of metal clock display and the clock display, measuring is done the same.

Turn the scale to the value of voltage to be measured. For example, if you want to measure the voltage is 220VAC, you rotate the knob to the 250VAC, do not choose too large scales (examples 1000VAC) because this causes incorrect measurement results. Conversely, if too small to elect scale (example 110VAC), which can lead to breakage test.


– When measuring AC voltage, to select AC measurement mode (areas on the clock symbol is ACV).

– When measuring voltage direct current (DC), to select DC measurement mode (areas on the clock symbol is DCV).


Normally for multimeter needle or clock display format of probe used, they are only used to measure direct current (DC), not used to measure alternating current (AC). You remember that to measure right.

Also when measured, regardless of the value of electric current to be measured and check type of clock you are using can be used or not.

For example, if you want to measure current consumption is around 1A, the clock to ensure that you are using can withstand the current through at least 1A. In lower case, as measured will lead to blow the fuse.

Multimeter Current Measurements As Follows

Move the scale to measure the current hiccups DC: Similar to measure voltage, you need to select the measured value is close to the current value is about measuring, for example, we choose the scale is 0.25A DC.

How To Measure The Current Through A Load With A Multimeter

Read the current value measured or expressed through the needle on the dial.

Measure the communication circuits

In addition to the ability to measure current, power, practical functions that people use most often is measured circuit.

Example: I have a 10-meter wire section, how to know if the wire has broken inside or not?

When The Wire Is Broken, The Clock Would Stand Still.

This feature is very useful in practice when needed to test a power switch is in good condition or not, filament bulbs that are broken or not, a piece of electrical wires intact or not … v .. v ….

And now we will show some advantages and disadvantages of each type multimeter:

The clock display with a needle:


– Used mainly to test the semiconductor (diode, transistor, MOSFET …) is still active or not, because it is easy to observe.

– Can be used to quickly check damaged components in electronic circuits.

– Ease of purchase and sale prices for many users to choose from cheap to quite expensive.

– Easy to read and follow the numerical values ​​displayed on the screen.

– High precision.


– Can be equipped with more advanced functions such as frequency measurement, power measurement.

– Ease of broken needles or electronic circuits inside if not used properly.

– Difficult to read the numeric values ​​as voltage, current, resistance value.

– Accuracy is not high.

– Easy to read and follow the numerical values ​​displayed on the screen.

– Can be equipped with more advanced functions such as frequency measurement, power measurement ..

– Expensive.

– Difficult to use in case the user to quickly check the damage of electronic components