FNIRSI DSO-152 Plus vs Digital Multimeter Malaysia When Do You Need an Oscilloscope?
FNIRSI DSO-152 Plus vs Digital Multimeter Malaysia – When Do You Need an Oscilloscope?
A digital multimeter is one of the most common tools for electronics troubleshooting.
You can use it to check voltage, resistance, continuity and other electrical parameters.
But sometimes a multimeter tells you that voltage is present while the circuit still does not work correctly.
This is where a digital oscilloscope, such as the FNIRSI DSO-152 Plus, can become useful.
The main difference is simple:
A multimeter gives you a number.
An oscilloscope shows you what the signal is doing over time.
Understanding this difference can help technicians, students and electronics hobbyists in Malaysia decide whether they actually need a mini oscilloscope.
Example: You Measure 5 V with a Multimeter
Imagine you are troubleshooting an electronic circuit.
You measure a test point using a digital multimeter and obtain approximately:
5.0 V
Does this mean the signal is working correctly?
Not necessarily.
The 5 V reading could represent:
Stable DC voltage
A pulsed signal
A square-wave signal
An unstable voltage
A signal containing noise
A rapidly changing waveform
A multimeter may show a useful numerical value, but it does not normally show the complete waveform.
An oscilloscope allows you to see the signal on a screen.
When Is a Digital Multimeter Enough?
For many everyday electrical measurements, a multimeter remains the better and simpler tool.
Typical applications include:
Checking battery voltage
Testing continuity
Measuring resistance
Checking a DC power supply
Finding an open circuit
Basic electrical troubleshooting
If you only need to know whether voltage is present, you may not need an oscilloscope.
When Do You Need an Oscilloscope?
An oscilloscope becomes useful when the question changes from:
“Is there voltage?”
to:
“What is this signal doing?”
For example, you may need to check whether a circuit is generating pulses.
You may want to see whether an oscillator is operating.
You may need to determine whether a signal is stable or irregular.
These are situations where a compact oscilloscope such as the FNIRSI DSO-152 Plus can provide additional information.
Example: Checking a Square Wave
Suppose a circuit should produce a square-wave signal.
A multimeter may display a voltage value.
But that number alone does not tell you clearly whether the expected square waveform is present.
With an oscilloscope, you can observe the waveform and evaluate basic characteristics such as:
Waveform shape
Amplitude
Frequency
Period
Signal stability
This is one of the fundamental reasons oscilloscopes are widely used in electronics troubleshooting.
Example: Microcontroller Signal
Consider an Arduino, microcontroller or other digital electronics project.
A circuit may have the correct supply voltage but still fail because a control signal is missing.
Checking the supply with a multimeter may show:
5 V — OK
or:
3.3 V — OK
But the problem may be somewhere else.
An oscilloscope can help you investigate whether a particular signal line is producing activity.
This makes a portable oscilloscope useful for basic microcontroller and electronics projects.
Example: Intermittent Signal Problem
Some electronic faults are not constant.
The signal may appear and disappear.
The voltage may fluctuate.
A waveform may become unstable under certain conditions.
A multimeter reading can sometimes make these problems difficult to understand because the display provides primarily a numerical measurement.
An oscilloscope gives you a visual representation of the signal.
That can make certain intermittent or changing conditions easier to investigate.
Multimeter vs DSO-152 Plus
The instruments should not necessarily be viewed as competitors.
They perform different jobs.
Measurement RequirementDigital MultimeterDSO-152 PlusDC voltage checkSuitablePossible depending on applicationResistanceSuitableNot its primary purposeContinuitySuitableNot its primary purposeView waveformNoYesObserve pulsesLimitedYesCheck basic frequency behaviourLimited/model dependentYesSee signal changes over timeLimitedYesElectronics troubleshootingUsefulUseful for waveform-related faults
For electronics work, having both instruments can provide a more complete troubleshooting setup.
Is the DSO-152 Plus Suitable for Beginners?
A compact oscilloscope can be a practical way to start learning waveform measurement.
Instead of immediately purchasing a more complicated bench oscilloscope, beginners can first understand basic concepts such as:
Time base
Voltage scale
Trigger
Frequency
Amplitude
AC and DC coupling
Waveform shape
Once these concepts are understood, moving to a more advanced oscilloscope becomes easier.
Can the DSO-152 Plus Replace a Multimeter?
No.
An oscilloscope should not automatically replace a digital multimeter.
For resistance, continuity and many straightforward voltage checks, a multimeter is still faster and more convenient.
A practical electronics toolbox may therefore contain:
Digital Multimeter + Mini Oscilloscope
Use the multimeter for basic numerical measurements.
Use the oscilloscope when you need to investigate the waveform.
Can a Mini Oscilloscope Replace a Bench Oscilloscope?
This is also not the right way to position the DSO-152 Plus.
A professional bench oscilloscope may provide higher bandwidth, higher sampling capability, multiple channels and more advanced analysis functions.
A mini oscilloscope is more appropriate when the application prioritises:
Portability
Basic waveform checking
Electronics learning
Simple troubleshooting
Convenient field use
For more demanding electronic design and higher-frequency measurements, choose an oscilloscope according to the required specifications.
Who Should Consider the FNIRSI DSO-152 Plus?
The FNIRSI DSO-152 Plus Mini Digital Oscilloscope may be worth considering for:
Electronics repair technicians
Technical students
Electronics hobbyists
Arduino and microcontroller users
Maintenance personnel
Technical training centres
DIY electronics users
It can also serve as a compact secondary oscilloscope for technicians who already use larger instruments at the workbench.
FNIRSI DSO-152 Plus Malaysia
If you are deciding between a digital multimeter and mini oscilloscope, first identify what you actually need to measure.
If you only need voltage, resistance or continuity, a multimeter may be sufficient.
If you need to see the waveform and understand how a signal changes over time, an oscilloscope becomes much more useful.
MTM Precision supplies FNIRSI electronic test and measurement instruments in Malaysia.
You may send us a photo of the circuit, equipment or application you are troubleshooting so we can help evaluate which type of test instrument is more suitable.
MTM Precision Sdn Bhd
Showroom & Service Centre:
No. 29-1 & 2, Jalan Bandar 18,
Pusat Bandar Puchong,
47160 Puchong, Selangor, Malaysia.
Tel: 03-8080 7172
WhatsApp: +6016-660 7346
Email: mtmpre@yahoo.com
Website: www.mtmpre.com.my
Supplying test and measurement instruments throughout Selangor, Kuala Lumpur, Johor, Penang, Melaka, Negeri Sembilan, Perak, Pahang, Kelantan, Terengganu, Kedah, Perlis, Sabah and Sarawak.
06 Oct 2026
