A tool that is used to measure volts, amps and ohms is called a digital multimeter. These tools are not the same as analog meters, which have needles and gauges. Digital multimeters have digital light-emitting diode displays. These types of multimeters are generally more accurate compared to the old analog types.

Using A Digital Multimeter

This measuring tool has some other functions; of course, the higher priced meters are going to have more features, but they all provide measurements for the three basic currents. There are types of digital multimeters that have specialized functions. Some have built-in temperature sensors that are useful for people that handle temperature-sensitive hardware, like computer processors.

A multimeter is very beneficial when attempting to fix an electrical problem. These tools are used quite frequently in businesses such as the automobile industry, machine repair, construction, computer industry, and other fields that call for any type of electrical work. When selecting a digital multimeter, a very important specification to consider is the unit’s operating resistance, commonly known as impedance. Since a multimeter becomes a part of the circuit system that is being tested, it will affect the electrical current in the circuit.

An additional specification to take into account when choosing a multimeter will be its range. It doesn’t matter what current is getting tested, the correct range for that particular measurement is essential for the measurement to be accurate. For example, if the operator was testing a nine volt battery, then having a range setting from zero to twenty-five volts is going to produce a better measurement than a digital multimeter unit that has a range setting from zero to five hundred volts. Many multimeters are made having an automatic range feature, that will automatically set the appropriate range for the individual circuit that is being tested. Basically, all the operator needs to do is to set the multimeter to the correct current being tested, then the digital multimeter will do the rest.

When working with a meter for the very first time, it is important for the operator to read the instruction guide that came with the unit. Numerous meters will have different steps that have to be taken before it can take any measurements. This could involve pushing specific buttons prior to connecting the leads, or anything else. Nearly all of these types of multimeters need a battery for functioning. The instruction guide will probably indicate which kind of battery is going to be needed. When the battery type isn’t given, then select alkaline batteries.

A digital multimeter’s maximum reading capability is really important too. This is the total maximum level of current which the multimeter can measure. Generally, the current limit will be printed on the front of the unit. A standard limit is usually ten amps. Which means that when the multimeter is connected to a current of twelve amps, the interior fuse will automatically pop to avoid damaging the unit. The installation of a larger fuse is not going to raise the limit of the unit and could cause the unit to quit working.

Whether measuring a circuit’s capacity, testing a battery, or seeking to identify an electrical short, digital multimeters are versatile devices that should be included in most toolboxes.

The Author is a keen user of digital multimeters. For more information about using a digial multimeter please read onto the next page.