Advantages of a digital multimeter

Answer 1

The true advantage of digital wattmeters over electromechnical wattmeters is the cost to operate the meter. Also, virtually all digital meters can emitt a radio signal to forward the power useage for a certain time period to a recording device. This means that a utility can drive around the block rather than manually walking up to each house and recording the power usage every month. The best electromechanical wattmeter has a power consumption of 24Watts. The leading Centron digital meter has a starting power of less than 5Watts. The operating power consumption for electromechanical meters is also more than that of digial meters. Loss of electromechanical meters is ~ .7Watts Loss of digital meters ~.5Watts The display could be considered an advantage also because people who are not trained in reading a scaled meter can read a digital meter easily, however, if they aren't trained in reading a meter they most likely will not understand what they are reading anyway.

Answer 2

It provides the functions of dc voltmeter, ac voltmeter, dc current meter, ohm meter and sometimes ac current meter, all in the one portable package. Digital tends to be cheaper and more accurate than analogue.

Answer 3

A digital multimeter has the advantages of idiot-proofing and accuracy. The digital readout gives you a single number instead of a dial pointing to several numbers on multiple scales. The digital also has a built-in overload protection that many analog meters don't have, protecting the meter itself. There are, however, downsides to using DMMs. They usually have a very high input impedance, typically many megohms, and can indicate induced or stray voltages that collapse as soon as any load, even a milliamp or two, is applied to the circuit. A frequent question from DIYers is 'I've disconnected the circuit but my meter is still reading (say) 85 volts. What's wrong?' or similar. Using an analog or 'needle' meter will show zero volts, that's because the input impedance of an analogue meter is much lower, a few hundred kilohms, relatively speaking. Each have their uses.

Answer 4

Digital millimeters will digitally display measurements while the analog meter uses pointers that will calibrate various things that are being measured. Digital millimeters can measure voltage, resistance, and currency and is more common than an analog meter.

Answer 5

A: The advantage is that the readout is more accurate and it can be read at different angles. the disadvantage is if the signal is not steady then the readout will roll numbers causing to take a guess of measurement. the others disadvantages if LED are used red LED cannot be read under the sun crystals display also needs external source of light to be read.

Answer 6

Digital multimeters are not necessarily more accurate than analogue multimeters. However, digital multimeters are

• more rugged -there is no delicate meter movement.
• easier to read -there is no need to worry about which scale to use, and to interpret exactly where the pointer is pointing.
• not subject to gravitational effects -can be read at any angle, without gravity affecting the pointer.

Answer 7

Electronic voltmeters are much more accurate than conventional AC meters. However AC meters are much less expensive than electronic voltmeters.

Answer 8

A combination of greater reliability and that most digital electric meters can be read remotely without having to have the meter man have physical access.