How To Use The Digital Multimeter

HOW TO USE A DIGITAL MULTIMETER MEASURING AC VOLTAGE
Connect the probes to their corresponding slots- the black probe to the “COM” or common slot, which is the ground, and the red probe to the “VΩ” slot.
Turn the knob to the AC Voltage sign, the letter V with this sign ~ above it.
Connect the black probe to the circuit.
Connect the red probe to the circuit.
Read the result on the screen.
MEASURING DC VOLTAGE
Connect the probes to their corresponding slots- the black probe to the “COM” or common slot, which is the ground, and the red probe to the “VΩ” slot.
This time, turn the knob to the DC Voltage sign, the letter V with a line above it.
Connect the red probe to the positive terminal.
Connect the black probe to the negative terminal.
Read the result on the screen.
MEASURING AC CURRENT
Connect the probes to their corresponding slots- the black probe to the “COM” or common slot, which is the ground, and the red probe to the “VΩ” slot.
Turn the knob to the AC Current sign, the letter A with the sign ~ above it.
Connect the probes to both ends of the circuit.
Read the result on the screen.
MEASURING DC CURRENT
Connect the probes to their corresponding slots- the black probe to the “COM” or common slot, which is the ground, and the red probe to the “VΩ” slot.
Turn the knob to the DC Current sign, the letter A with a line above it.
Connect the probes to both ends of the circuit.
Read the result on the screen.
MEASURING RESISTANCE
Connect the probes to their corresponding slots- the black probe to the “COM” or common slot, which is the ground, and the red probe to the “VΩ” slot.
Select the required range.
Touch the probes to the ends of the resistor.
Read the display on the screen.
MEASURING CAPACITANCE
Turn the knob to capacitance testing mode- with the icon or symbol of a capacitor.
Connect the probes to the capacitor ends.
If polarized, determine the positive and negative sides.
Read the result on the screen.
CONTINUITY
It is the presence of a complete path for the flow of current. If there is no continuity, it means that there is a break somewhere in the circuit. It will then produce no sound or tone in the digital multimeter. On the other hand, if two points are connected electrically, or are continuous, the digital multimeter will emit a sound or tone. This test ensures that there is a connection between two points.
Continuity is one of the most useful tests for electronics repair. Continuity tests are of utmost importance in avoiding fires, shocks, or damages to electrical devices.
Now, how to check continuity?
Turn off the system, unplug it, or remove the batteries.
Connect the probes to their corresponding slots- the black probe to the “COM” or common slot, which is the ground, and the red probe to the “VΩ” slot.
Turn the knob to continuity mode with the icon or symbol like that of sound waves.
To check if the continuity calibration of the multimeter works, touch the metal end of the probes together. If the number on the screen displays less than 1 or 0, then the multimeter is functioning properly. This will then indicate continuity, and the digital multimeter must emit a sound or a tone.
Place the probes at each end of the circuit or component you want to test. If the result is the same to step 4 then there is continuity in the circuit or the component.
TESTING Diodes TRANSISTORS
Connect the probes to their corresponding slots- the black probe to the “COM” or common slot, which is the ground, and the red probe to the slot or terminal with the diode sign.
Turn the knob to the diode tester.
Connect alligator clamps to both metal end of the two probes.
Determine which of the transistor leads is the collector, base, and emitter.
Clamp the probes to the transistor leads- the black probe to the base of the transistor and the red probe to the emitter.
Read the display on the multimeter and take note of the resistance.
Remove the red probe from the emitter and move it to the collector side.
The display on the multimeter should be the same as when the red probe was on the emitter side.
Remove the black probe from the base side.
Clamp the red probe to the base side.
Clamp the black probe to the emitter side. Take note of the displayed value.
Clamp the black probe to the collector side. Take note of the displayed value.
If both previous readings (when the black probe is at the base) are higher than the current readings (when the red probe is at the base), the transistor is good.
DIODES
Connect the probes to their corresponding slots - the black probe to the “COM” or common slot, which is the ground, and the red probe to the slot or terminal with the diode sign.
Turn off the power source.
Turn the knob to the diode tester.
Determine the cathode and the anode of the diode. Touch the anode using the red probe and the cathode using the black probe.
Read the display on the multimeter. If the reading is between 0.5 to 0.8V, then the diode is good.

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