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| Multimeter |
Multimeter-Multimeter which is also known as VOM (means volt ohm milliammeter) is an electronic measuring instrument that consists of several measuring functions in a single unit. A multimeter is a combination of multirange DC and AC voltmeter, milliammeter, and ohmmeter. There are two types of Multimeters and these are:-
Analog multimeters use a microammeter, voltmeter, and ohmmeter with a moving pointer to display its readings. Digital multimeters have a numeric display and it may also show a graphical bar that represents the measured value.
Among all of these two multimeters, Digital multimeters are now far more common due to its low cost and greater precision. But Analog multimeters are still preferable in some cases,
Construction of Multimeter
The construction of the multimeter is very complex. This meter is used to measure different types of electrical parameters up to a wide range. The diagram given below will describe the basics of a multimeter.
A multimeter is a combination of a wide range of DC and AC voltmeter, milliammeter an ohm-meter. A multimeter is used to measure a different type of electrical parameter and this meter indicates all of these measured parameters on a single display. The multimeter has three input terminals and a moving slide. while using multimeter users have to input the measuring quantity by using either any input terminal and also user has to adjust the movable slide according to the measuring quantity.
To connect the probes in a multimeter a banana socket pin is used. out of these two-pin sockets, one pin is common for both AC and DC voltage. The rest of the instrument instead of socket pins, function switch, or range switch is used. Function Switch or range switch is used to set the desired value of either AC or DC voltage.
- Before working with the multimeter, check the meter test leads for trayed or broken insulation.
- Never use the ohm-meter section on a live circuit.
- Do not touch the bare metal clips or tips of the test probes.
- Do not connect the ammeter in parallel while measuring the current.
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