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A digital multimeter is described as an instrument used to record electric values. It’s straightforward to use and displays readings on LED or LCD screens. It makes noting down of measurements more accurate. A 7-function digital multimeter tests and measures among them direct current (DC), voltage, AC voltage, resistance, continuity, transistor, and battery on various electronics.
Measuring DC using a seven function digital multimeter
7 function digital multimeter measures DC conductors that have up to 10
amperes. The following are the steps to follow when measuring DC using a
seven function digital multimeter.
Position the switch selector to read 10 amperes. It is essential to start with the maximum range if the amperage is not known.
Plug the positive lead into the 10A top jack. Then insert the negative lead into the COM bottom jack.
keenly, using the tips of the probes, touch the exposed conductors to
measure the amperage. It is important to note that amperage is tested in
series with the circuit under test.
Note down the readings.
Change the red lead to the center jack if the measurement reads below
2AMPs and then position the range selector switch to the 200 Ma setting.
Unplug the test leads once testing is complete and store them with the multimeter.
Measuring DC voltage using a seven function digital multimeters
A 7 function digital multimeter measures DC conductors that have a maximum of 1000 VDC.
Adjust the function switch to read 1000 VDC.
Plugin the red lead into the positive jack, and the negative lead into the negative jack.
the positive test probe tip carefully towards the positive end of the
circuit then point the negative test probe tip to the negative end of
Note readings on the display screen of the
multimeter. To achieve higher resolution readings, realign the function
switch to effectively lower VDC readings. The screen of the multimeter
will then show the correct value and decimal point.
is important to note that you should not test DC voltage if the
component under test on the circuit is being turned OFF and ON
Measuring AC voltage using a seven function digital multimeter
A 7 function digital multimeter measures AC conductors that carry a maximum of 750 VAC. Here are the steps one should follow.
the switch function to the maximum VAC point, which reads 750 VAC. If
the voltage is not known, it is important to always begin with the
Plugin the live lead to the center jack and insert the ground lead to the bottom jack. Then switch on the multimeter.
the live lead to the live side of the circuit, and the ground lead to
the negative side of the circuit. Be cautious and careful to avoid
damage or any injuries.
Note the readings. Position the select or range switch to read the minimum range if the voltage is below 200 volts.
Remove the test leads if testing is complete.
is important to note that you should not test AC voltage if the
component on the circuit is turning on and off. One should be careful to
Measuring resistance using a seven function digital multimeter
A 7 digital multimeter measures circuit resistance that is not more than 2000K ohms. The steps to follow are.
in the black test lead into the COM jack and the red test lead into the
VΩ jack. Once that is done, unplug the negative and positive leads in
reverse order, starting with red followed by black leads.
the leads to the component under test, making sure that the circuit is
OFF. It may be necessary at times to detach the element under test from
others in the circuit.
Once a complete continuity is detected, the multimeter beeps, but the multimeter will not beep if there is an open circuit.
Once you are done switch off the multimeter to save battery
Measuring transistor (hFE) using a seven function digital multimeter
the live lead into the center port, and the ground lead into the bottom
jack. Then switch on the multimeter. Short circuit the two leads so
that the multimeter reads zero Ohms.
Point the ground lead onto the negative end, and the live lead onto the positive terminal.
Note down the measurements.
discussed in this article, a seven function digital multimeter has
seven functions. Hopefully, this article will guide you step by step on
how to use a seven function digital multimeter in measuring DC voltage,
AC voltage, resistance, continuity, transistor, and battery test.