A multimeter is an instrument used to check for AC or DC voltages, resistance, continuity, and small currents in circuits. With it, you can test electrical outlets, devices, wires, and more.
In this guide from Power Tech BD, we’ll show you how to use a multimeter step-by-step. You’ll learn to measure voltage, resistance, and amps easily, even if you’re a beginner.
Getting Familiar With the Device
Locate the Dial of Your Multimeter
The dial is at the center. It helps you select what to measure—volts, ohms, or amps. Turn it slowly to choose.
Find the Selector Switch (Knob)
This is the same as the dial. Turn it to select what you want to test.
Locate the Test Lead Openings
There are 2 to 3 holes at the bottom of the device. The black lead goes in “COM.” The red lead goes in the one labeled “VΩmA” or similar.
Find the Test Leads
Test leads are wires with pointed ends. These help you touch circuits safely. One is red (positive), and one is black (negative).
Locate the Battery and Fuse Compartment
This is usually at the back. Open it to change the battery or fuse when needed.
Find the Zero Adjustment Knob (Analog Only)
If you are using an analog multimeter, this knob sets the needle to zero before measuring resistance.
Measuring Resistance (Ohms)
Step 1: Set the Multimeter to Ohms (Ω)
Turn the knob to the ohms sign. It’s shaped like a horseshoe.
Step 2: Check the Leads
Insert the black lead into “COM” and the red into “Ω”.
Step 3: Touch the Leads Together
You should see a small value or zero. This means your multimeter is working.
Step 4: Test Something
Touch the ends of a light bulb or wire. The display will show the resistance value.
Step 5: Try Different Ranges
If you get “1” or “OL,” change the dial to a higher or lower range.
Step 6: Measure Resistance Between Hands (Optional)
Touch one probe to each hand. You may get a reading, showing body resistance.
Step 7: Accuracy Tips
Hold the probes steady. Make sure there’s no power in the item you’re testing.
Measuring Voltage (Volts)
Step 1: Set to AC or DC Volts
Use “ACV” for wall outlets. Use “DCV” for batteries or circuits.
Step 2: Insert Test Probes
Put the black lead into “COM” and red into “V” port.
Step 3: Locate Voltage Scales
If it’s digital, it will auto-scale. If analog, choose the right range.
Step 4: Test an Outlet
Put one probe in each hole. You should get around 220V to 240V in Bangladesh.
Step 5: Remove the Probes
Take out the test leads after you’re done.
Step 6: Stay Safe
Do not touch the metal parts while testing.
Measuring Current (Amps)
Step 1: Measure Voltage First
Always check the voltage before measuring amps.
Step 2: Set to Amp Mode
Turn the dial to “A” or “mA” based on the circuit’s current.
Step 3: Insert the Leads Correctly
Black in “COM,” red in the “A” port.
Step 4: Use a Clamp Meter if Needed
Clamp meters are safer for high current. Just place it around a wire.
Step 5: Watch for Surge Current
Some circuits give a big spike when turned on. Be careful.
Multimeter Safety Tips
- Always test on the correct setting.
- Don’t touch metal probe tips.
- Use the right range to avoid errors.
- Never test resistance on a live circuit.
- Store your multimeter in a dry place.
Why Choose Power Tech BD
Trusted in Dhaka
Power Tech BD is a leading supplier of electrical measuring tools in Bangladesh. We provide only genuine, reliable products.
Wide Range of Instruments
We have all types of multimeters, clamp meters, and measuring tools.
Expert Help
Not sure what to buy? Our team can guide you to the right product.
Quality Assurance
Each tool is checked and tested for quality before delivery.
After-Sales Service
Need help using your tool? We provide instructions and support.
Conclusion
A multimeter is easy to use once you know the basics. Follow the steps in this guide and practice safely. Whether you’re testing a battery, outlet, or a small device, your multimeter will be your best friend.
Power Tech BD makes it easy for you to find the best multimeters in Dhaka. Start measuring with confidence today!
Frequently Asked Questions (FAQs)
What is a multimeter used for?
A multimeter measures voltage, current, and resistance. This simple tool can be used to test batteries, household outlets, motors, wires, and electronic devices.
Can I use a multimeter to check if a wire is live?
Yes. Set your multimeter to AC voltage (ACV), place the black probe on a neutral point and the red probe on the wire. If it shows 220–240V (in Bangladesh), the wire is live.
Is it safe to test an outlet with a multimeter?
Yes, but you must follow proper safety precautions:
- Set the multimeter to ACV
- Keep your hands on the insulated part of the probes
- Do not touch metal probe tips
If unsure, consult with Power Tech BD before testing.
What is the difference between digital and analog multimeters?
- Digital multimeters show readings on a screen—easier and more accurate.
- Analog multimeters use a needle gauge—good for observing changes but harder to read.
Power Tech BD offers both options depending on your need and budget.
How do I know if my multimeter fuse is blown?
If your multimeter doesn’t show any reading during current testing, or the display stays blank, the fuse may be blown. Open the back compartment and check or replace the fuse as needed.
Can I test batteries with a multimeter?
Absolutely! Set your multimeter to DC voltage (DCV):
- For AA/AAA batteries: should read around 1.5V
- For 9V batteries: should read close to 9V
Lower readings mean it’s time to replace the battery.
Where can I buy a good multimeter in Bangladesh?
Visit Power Tech BD – your trusted supplier for digital and analog multimeters, clamp meters, and other electrical test tools. We deliver across Dhaka and beyond with expert support.