To control AC or DC voltages, resistance and continuity of electrical components and less supply of current in circuit’s, multimeters are used.
With the aid of this instrument, you can keep a check whether there is voltage present in the circuits or not. By providing such a facility a multimeter lets you achieve a lot of desired tasks. So how to use multimeters for voltage testing? Following the steps listed below you will get to know how to use multimeters for voltage testing?
• Protecting meter circuitry and movement from high voltage
A voltage has a value that is not known sometimes. For this purpose, the highest range is selected so as not to harm the meter circuitry and movement by high voltage than needed.
• Check probe insertion:
You must insert the black probe in the COM or- jack. Then insert the red probe in the +jack or V.
• Voltage scales shall be located:
You will know that there are different volt scales with highest maximum values. The voltage scale will be read once it is chosen by the selector knob. Selector knob ranges will coincide with the maximum value scales. The voltage scales are linear. The voltage scale is totally true, and the reading can be accurately taken from it.
• Using a tester to test electric outlets that are common:
There are two straight slots. Press and hold the black probe into the slots. You can always let go a black probe. Then insert and hold the red probe into the other slot. The voltage will be shown to you on the meter which will be around 120 to 240 volts.
• The probes shall be removed from the slots:
The selector range shall be oscillated to its minimum range, which should be greater than the voltage that is shown on your meter (120 to 240 volts)
• The probes shall be inserted again as done before:
To get absolute readings the range of the meter is very crucial. The range of the meter may vary between 110 volts and may even increase to 125 volts. If you choose DC in place of AC, then the meter pointer will not move from its place. The AC and DC modes are not at all adaptable to each other. You may mistakenly think that there is no voltage, and it may prove very risky and dangerous for you. So the correct mode must always be set. If your meter pointer doesn’t shift from its place, then try using both modes, DC as well as AC. Before trying again, you must set your meter to AC volts mode.
• Never hold two probes together at the same time, especially while making examination:
Always give your level best to hold at least one of your probes in place in such a way that you don’t require to hold both the probes while conducting tests. Alligator clips or various types of clamps can help you with this task. These are accessories for your meter and especially for your safety. These accessories protect and save you from burns or any other kind of injuries.
If you follow these simple guidelines, then you will be able to use multimeters for voltage testing.