There are two major classifications, the analog multimeter and the digital multimeter. An analog multimeter uses a display screen with a pointer stick on a scale range, this can be problematic in terms of its accuracy because measurements can be affected by a number of factor such as vibrations, angles of use and viewing, number range, and zero calibration. The digital multimeter on the other hand has an LCD screen that displays the digits of the resulting measurements which is much more accurate and won't be affected by movement, angles of viewing, and the exact measurement of range results will be shown up to the last decimal. In reading the digital multimeter, it will be hard to make errors in measurement which is attributed to human errors in reading the analog screen and doing mental arithmetic because the digital multimeter screen will show the one and only result of your measurement, no need to guess the range or make adjustments due to varying zero calibration.
Aside from superior accuracy, a digital multimeter, because of its nature and design can have some added features depending on its central processing unit, the more expensive a digital multimeter device is, the higher the chance that it has useful extre features. These are just some of the added functions usually included in a digital multimeter; An Oscilloscope: this is an electronic measuring device for documenting constantly changing voltage in circuits, it shows the wave shape of an electrical signal using wave characteristics like time interval, amplitude, distortion, etc. Auto ranging: the digital multimeter CPU computes the appropriate range between a set of varying values and displays the most significant results on the screen. Automotive circuit testers: includes a variety of special functions that are used specifically for car wiring and electronics. Auto polarity adjustment: the digital multimeter screen will show if the voltage running through the object in question is positive or negative. More recent models of the digital multimeter can even have integrated features that enable it to upload results to a more sophisticated computer through wireless linking hubs, USB ports, RS232 cables, and a host of other options. More upgrades and added features of the digital multimeter are being developed and tested to be able to keep up with the growing complexity of human technology.
The digital multimeter has all these advantages over its analog counterpart; improved accuracy, high speed processing, and intelligent auto results. These superb and functional features of the digital multimeter are only the tip of the iceberg for this handy and efficient measuring device, the coming years will be witness to the more intricate and functional add-ons that manufactures have up their sleeves.
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