How to Use A 7 Function Digital Multimeter?

The 7 function digital multimeter is a great tool for measuring voltage, current, resistance and more. But it can be hard to use if you don't know what the different functions are or how they work.

This multimeter has an easy-to-read LCD display that clearly shows readings in volts, amps, ohms and milliamps. It also includes a backlit screen so you can take measurements at night or in low light conditions.

To work as an expert, we will give you step by step guide on how to use a 7 function digital multimeter efficiently.

Guides on How to Use a 7 Function Digital Multimeter

Each Of the Symbols Mean

When it comes to testing electric equipment, the use of meters is one of the basics. Digital multimeters are among the most popular, as they have numerous uses and do not require a great deal of expertise as other meters.

The following are the functions of DMM and how to use them:

Function 01: AC Voltage

If measuring AC voltage, switch the function dial to AC. Then, turn the multimeter on and set it to read either 200 volts AC or 750 volts AC.

Finally, place each probe tip on either side of the power cord. If you are perfectly aligned with the source of energy, the meter will read the voltage. For authentic information on 7 function digital multimeters, please visit KAIWEETS.

Function 02: DC Voltage

If measuring DC voltage, switch the function dial to DC. Then, turn the multimeter on and set it to read either 200 mV to 1000 volts.

Finally, place the black probe tip on the negative (-) side of the power source and place the red probe tip on either side of the positive (+) side of the power source. If you are perfectly aligned with the source of energy, it will read ± output.

Function 03: DC Current

To measure DC current, switch the function dial to DC.

Then, turn the multimeter on and set it to read 10amp to 200μ.

Finally, place the current range copper wire probe in series with the positive (+) and negative (-) wires from the power source.

Make sure you have a good electrical connection. If you are perfectly aligned with the source of energy, it will read output watts.

Function 04: Resistance

To measure resistance, switch the function dial to Ohms. Then, turn the multimeter on and set it to read either 200 Ohms or 2000K Ohms.

Turn the knob until the desired reading is displayed in ohms. Once you've selected your range, place one probe at either side of the resistor and the multimeter should read the resistance.
Function 05: Transistor Test

To measure a transistor, switch the function dial to the hFE position.

Then, turn the multimeter on and set it to read.

Finally, place each probe tip on either side of the transistor's antenna. If you are perfectly aligned with the source of energy, the meter will read the transistor's gain.

Function 06: Diode Test

To measure the diode test, put the black probe on the cathode and the red probe at the anode of the diode. Then, turn on the multimeter.

The reading displayed should indicate whether testing is successful or not.

Function 07: Battery Test

To measure battery test, switch the function dial to DC volts. Then, turn the multimeter on and set it to read require VDC according to battery volt.

Lastly, put the positive (red) meter probe tip at the positive (red) battery terminal also, the negative (black) probe at the negative (black) battery terminal.

The reading displayed should indicate whether testing is successful or not.

These are the basics of how to use a 7-function digital multimeter. It's best to learn the multi-meter functions when you are not in an emergency situation to avoid mistakes.

Other Uses of a 7 Function Digital Multimeter

i) Test the continuity of wires or cables

ii) Measure relative insulation strength between conductors.

iii) Measure the impedance of various components.

iv) Detect leaking currents

v) Measure the properties of various components like pure resistors, capacitors, and semiconductors, etc.

Troubleshooting Tips for When Things Go Wrong

There are an infinite number of things that could go wrong when using your multimeter. When it does, here are some helpful tips to get you out of trouble:

NO #1: The Multimeter Does Not Turn On

Check to make sure you are using fresh batteries in the meter by removing the battery compartment cover.

If there is corrosion on the battery terminals, remove it with a wire brush or sandpaper. Then, dry all parts thoroughly and recharge the batteries with a charger that matches your type of rechargeable batteries.

NO #2: The Multimeter Turns Off After a Few Seconds of Usage

Change the fuse inside your multimeter's case if you get this problem frequently. If not, then check that all of your probes are securely fastened to their connection points on the meter.

NO #3: The Display Panel is Completely Blank

A blown fuse inside the case of your multimeter may be the cause of a blank display panel. If not, please ensure that all of your probes are securely attached to their connections on the meter.
Also, see if there is any water damage or dirt inside the ports where the probes are plugged in.

NO #4: The Multimeter Measures Incorrectly

Check to make sure the dial is on the correct function setting for what you are testing. Also, check that your probes are securely fastened into their connection points on the meter.
Safety Precautions for Beginners

Here are some safety precautions for when you first use your digital multimeter to avoid electrical shocks and other accidents.

i) Never test for voltage near water or any moisture-sensitive device. Avoid touching the probes together when the meter is turned on (the current will travel through your body).

ii) Always check that all of your connection probes are securely plugged into your multimeter before you turn it on.

Also, make sure the probes are not already connected to anything else they are not supposed to be touching.

iii) Do not insert or remove probe connections when your meter is turned on.

iv) Always make sure your hands are dry before touching the probes on your multimeter.

Conclusion

This guide has shown you the basics of how to use a 7 function digital multimeter. But, it is also very important for you to read and understand the detailed instruction manual that comes with your meter.

If you follow all of these simple guidelines for using your multimeter, then you will be able to troubleshoot electrical problems accurately.

  • November 17, 2021
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