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Multimeter Safety Precautions (How To Use A Multimeter Safely)

Multimeters are electrical equipment that measures voltage, resistance, and current. The multimeter is a safe device and is a tool for trained technicians.

Multimeters can cause electrocution if handled by an ignorant person.

How to Use a Multimeter Safely?

For a technician, safely using this equipment is a skill they should master to uphold their safety and improve their skills.

One of the main factors that cause electrical accidents is carelessness.

It is, therefore, vital for you to follow the safety precautions provided to avoid unwanted situations.

Multimeters are of diverse models and brands.

They have different features.

I will not focus on one brand when explaining its safety precautions.

How will the multimeter measure voltage?

The multimeter has a rotary selector that helps set the measuring, whether voltage (v), Resistance, and Current (A).

The voltage and the current can be set to Alternating current (AC) or direct current (DC).

They convert to AC by pressing a curve with a broken line and for DC by pressing a broken and horizontal line.

When using the equipment, it is a requirement for you to select the type of current and voltage you will be testing as it helps avoid the error which can lead to electrocution.

The equipment has sockets on it which you plug.

They are black and red insulated conductors with pointed tips.

On the multimeter, ensure the black test lead is on the socket with makings β€œCOM”.

The red conductor is on the socket with markings of resistance and voltage.

On the socket marked for current, depending on what you want to measure.

Safety tips when measuring voltage

Ensure you know the quantity you want to test so that you place the lead on the wrong socket to prevent electrocution.

When measuring voltage under alternating current, ensure the test leads do not touch each other when connected to the circuit.

When the test leads touch, it will shorten the circuit leading to a spark or a flame that can burn you.

If the insulating material on the test leads is broken or torn, do not use that multimeter.

If your fingers touch the conductor, it will cause shock.

You should check if the multimeter has internal DC and AC voltage before using it.

How does a multimeter measures resistance?

Resistance is the difficulty in moving current in a device.

Ensure the test leads are in the correct sockets, then use the selector switch to resistance.

Resistance should be tested, on a de-energized component.

If there is any voltage in the component tested, it will display faulty readings when measuring resistance.

How current is measured by a multimeter?

Measuring current using the multimeter requires a lot of concentration since it is hazardous.

To measure the current, you must force the current to pass through the multimeter.

It means the multimeter will be a part circuit. You must interfere with the original current and add the meter to the circuit.

Set the meter to AC or DC.

The red test lead should be on the red socket.

Break the original circuit and connect the meter to the circuit.

The black test lead is connected to the negative.

The red at the end of the component being tested.

On high power circuits, even if the voltage is low, the current is high which causes an electric accident.

Safety measures when using the meter?

Ensure you are using the correct multimeter.

Select a meter that is friendly to your measuring location by checking the CAT ratings will guide you on where it is used.

It will help prevent damaging the meter and electrocution.

Test the meter before using it.

Check if it has physical damage.

Check if it is not faulty in any way by testing it on a device with known readings.

After using it, disconnect the leads and keep them safe.

Examine the test probes.

Ensure that the insulating material in the leads is not torn or damaged.

The leads should be firm and secure.

The tips of the leads should not be exposed as much.

Avoid electric shock

When you become a part of the circuit, you are electrocuted.

Use protective materials like gloves and headwear.

When measuring components of exposed circuits, ensure you are not alone.

When using the multimeter, ensure the surrounding environment is humid or dumped.

Ensure you pay attention to the warnings both audio and visual, the meter may display.

Understanding the Dangers

A power surge is a spike in energy that causes an increase in voltage.

Blasts and flashes are current discharge in an air gap.

Know the CAT ratings

It is the extent of the power strike that the multimeter can withstand.

X multimeter safety precautions (How To Use A Multimeter Safely)


A multimeter measures voltage, resistance, and current.

To ensure safety, you must follow the following rules:

  • Ensure you are using the correct multimeter.
  • Examine the meter before using it.
  • Examine the test probes.
  • Avoid electric shock.
  • Understanding the Dangers.
  • Know the CAT ratings.