Digital Pocket Multimeter is One the Most Versatile and Useful Instruments
Digital Pocket Multimeter
Pocket Multimeter: A digital pocket multimeter is one the most versatile and useful instruments in your auto shop. It is important to own a good model and understand how to use it properly. A digital pocket multimeter is actually three devices in one. It is a voltmeter that measure electrical potential across a device in volts. It is an ammeter that measures the amount of electric current through a device. This is measured in amps. Finally, a digital pocket multimeter is an ohmmeter that measures electrical resistance of a device. Electrical resistance is measured in ohms.
Below the digital readout is a large knob called the function switch. The function switch allows you to change the modes the digital pocket multimeter operates in. For example, you can easily change 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 measure voltage. They measure 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 ? measures resistance in ohms.
In order to measure voltage, first turn on the digital pocket multimeter and let it go through its startup procedure. Generally the digital readout lights up and the unit goes through its self diagnostic checkout. Once that is completed you are ready to measure volts. Now turn the function switch to V= to measure DC volts. Now you will need to connect the red and black leads to the digital pocket multimeter. Connect the red lead to the red input terminal labeled V? and connect the black lead to the terminal labeled COM for common terminal. Now you can measure volts by putting the red lead on the terminal with the higher potential and the black lead on the lower one.
To measure amps, the leads must be connected in a different 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 terminal labeled 300mA. Now you are ready to connect the meter in series the device being measured by opening up the circuit and inserting the meter between the open points.
The third feature of a digital pocket multimeter is its ability to measure to Ohms. Ohms is a measurement 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 ? position and connect your leads. The red lead is connected to the terminal labeled V? and the black terminal connects to the COM terminal. The display will indicate OL. This is normal and means there is an overload. Now connect the leads across the device to measure the Ohms.
Digital Pocket Multimeter for Automotive and Industrial Applications
Digital pocket multimeters have now become an essential tool for any mechanic or technician working with electronic equipment. Far more sophisticated than their analogue counterparts of the past, the digital pocket multimeter has evolved into highly specialized device engineered for specific testing situations in both private and commercial arenas. Digital pocket multimeters may be small, hand-held devices used to check electronic systems on automobiles, or they may appear as advanced bench instruments in manufacturing labs or industrial field applications. Red Hill Supply distributes digital pocket multimeters by Fluke and carries the full spectrum of engineering designs for both commercial clients and individual end users.
Any type of electrical troubleshooting or repair work normally requires a digital pocket multimeter to pinpoint electrical problems and to provide various measurements of electrical phenomenon. Standard measurement settings for most digital pocket multimeters include current (AMPS), voltage (VOLTS), and resistance (OHMS). In simple layman’s terms, resistance refers to the ease of electrical flow, voltage references the amount of electrical flow, and amperage reflects the power of electricity itself. Additionally, a good digital pocket multimeter will accurately measure both AC and DC devices. A car battery produces DC and requires adequate voltage for reliable operation. On the other hand, the vehicle alternator produces AC and may call for testing amperage as well as voltage. Any work on a vehicle’s radio or stereo system requires testing resistance, as insufficient Ohms will cause a speaker to blow out. More advanced digital pocket multimeters engineered for commercial and industrial projects offer additional test options measuring capacitance, frequency, circuit continuity, inductance, and even temperature.
Executive summary about Digital Multimeter By Jason Miller
See also : Importance of Digital Pocket Multimeter
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