Using a Digital Multimeter

A digital multimeter is one the most versatile and useful instruments in your auto shop. It is leading to own a good model and understand how to use it properly. A digital multimeter is categorically three devices in one. It is a voltmeter that quantum electrical potential across a device in volts. It is an ammeter that measures the whole of electric current straight through a device. This is measured in amps. Finally, a digital multimeter is an ohmmeter that measures electrical resistance of a device. Electrical resistance is measured in ohms.

Today, modern digital multimeters are designed to be rugged and easy to operate. A good multimeter will have a rugged plastic case and large, easy to use selector knobs. The top part contains the digital read out screen. This is something you should wholly check out before you purchase one. Make sure the screen is large adequate to read it and make sure you see the readout in sunlight. Chances are you will be using this instrument covering in direct sunlight.

Fluke

Below the digital readout is a large knob called the function switch. The function switch allows you to convert the modes the digital multimeter operates in. For example, you can categorically convert from voltmeter to ammeter to ohmmeter with the turn of the dial. Again make sure the function switch is large and easy to operate. Most function switches have approximately eight positions. Most have three V markings that quantum voltage. They quantum Ac, Dc and low voltage currents in the millivolt range. Next there will be two positions marked with A~ and A=. The A~ measures Ac current in amps and the A= measures Dc current in amps. The upside down horseshoe Ω measures resistance in ohms.

In order to quantum voltage, first turn on the digital multimeter and let it go straight through its startup procedure. Generally the digital readout lights up and the unit goes straight through its self diagnostic checkout. Once that is completed you are ready to quantum volts. Now turn the function switch to V= to quantum Dc volts. Now you will need to connect the red and black leads to the digital multimeter. connect the red lead to the red input concluding labeled VΩ and connect the black lead to the concluding labeled Com for common terminal. Now you can quantum volts by putting the red lead on the concluding with the higher potential and the black lead on the lower one.

To quantum amps, the leads must be connected in a distinct fashion. First set the function switch to A= position. connect the black lead to the Com terminal. Now you must connect the red lead to the concluding labeled 300mA. Now you are ready to connect the meter in series the device being measured by opportunity up the circuit and inserting the meter between the open points. The results will be in milliamps because you are using the 300mA terminal.

The third highlight of a digital multimeter is its quality to quantum to Ohms. Ohms is a determination of resistance in an electrical circuit. First disconnect all wiring and power sources from the device being measured. Now turn the function switch to the Ω position and connect your leads. The red lead is connected to the concluding labeled VΩ and the black concluding connects to the Com terminal. The display will indicate Ol. This is general and means there is an overload. Now connect the leads across the device to quantum the Ohms.

These are the basic functions of a digital multimeter. Remember to shut off your multimeter before storing it back in the your toolbox. You do not want a drained battery the next time you will need it. There are several good brands on the market today. Fluke digital multimeters are probably the most beloved and you won't go wrong with one.

Using a Digital Multimeter

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