Multimeters, essential tools for electricians, come in both analog and digital forms. These instruments are adept at measuring current, voltage, and resistance. The display on these meters includes symbols such as ‘K’ or ‘M’ preceding the omega symbol, indicating kilo-ohm or mega-ohm resistance ranges.
Analog and digital multimeters differ significantly in their displays. Digital multimeters provide precise numerical readouts, while analog multimeters use a needle and scale. For testing continuity, the calibration can be checked by touching the two terminals together. When measuring resistance with an analog multimeter, the same procedure is followed as with a digital one.
The construction of these meters varies. Analog multimeters use a moving coil meter and pointer, while digital versions have a digital or analog meter, batteries, resistors, and other circuitry for accuracy and speed. The Tekpower TP8260L, for instance, is an analog multimeter ideal for measuring AC/DC voltage and DC current up to 10A.
Multimeters, including more sensitive models, can also calibrate other items. They typically feature a rotary switch for selecting different electrical parameters. To ensure longevity, it’s crucial to choose a multimeter with a durable outer casing. Analog multimeters are generally less accurate than digital ones due to potential errors in pointer reading and parallax issues.
In summary, whether analog or digital, multimeters are indispensable for various electrical measurements. Their designs cater to different preferences and requirements, providing a comprehensive range of solutions for electrical and electronic fault finding and testing.
