Useful content

Ammeter - a device operating principle and scope

Ammeter - a measuring device that performs current measurement function in the circuit in amps. Thus, each device is designed to measure a specific value. In this article I want to tell you about the structure of data measuring instruments and their varieties. So, let's begin.

Digital and analogue ammeters
Digital and analogue ammeters

Ammeters are divided into two broad classes:

1. Analog.

2. Digital.

Let's talk about the analog meter, which had also referred to the arrow:

analog Ammeter
analog Ammeter

analog ammeter

Operate such devices due to the magneto-electric system, which works as follows:

Ammeter located in the housing of the thinnest wire coil disposed in the permanent magnets and is associated with a special spring.

The principal apparatus Ammeter
The principal apparatus Ammeter

Once the coil begins to flow electric current, is formed around the electromagnetic field which enters into interaction with the magnetic field of permanent magnets, and coil changes its position under the action of torque, and a spring attached inhibits it.

Once the rotation and braking moments are balanced coil stops, and with it, and an arrow that indicates a proportional current which now passes through measuring device.

Ammeter going wild
Ammeter going wild

Sometimes, increasing the limit of measurement in the ammeter circuit with switched resistor whose parameters are calculated in advance. And such a resistor is called - a shunt.

Ammeter mounted in series (in the gap), so it is crucial internal resistance and the smaller it is, the better for it.

After all, if the internal resistance ammeter is large, then it (ammeter) to an existing network, a resistor, resulting in a decrease in the current circuit and the data will not reflect the real parameters.

Internal resistance is taken into account in the production of an ammeter and in view of its magnet system and configured spring.

Ammeter of accuracy class 2.0
Ammeter of accuracy class 2.0

The undoubted advantages of analog gauges include the fact that no separate power supply is required for their functioning and they work by directly flowing current, but disadvantage is that such meters are quite inertia.

That is, we see the value of current flowing immediately, but with a delay, which is connected with the fact that the internal system takes some time to make a balance.

digital ammeter

This type ammeter is a more complicated construction, which includes an analog to digital converter (ADC), where the current is converted into digital data, reflecting on LCD.

digital ammeter
digital ammeter

Such meters have such a drawback as the inertia and speed of delivery of information directly related to frequency characteristics set by the processor. In a fairly expensive counterparts refresh rate can be more than 1,000 updates per second.

By cons include ammeters such that for the normal operation of individual power is required. Of course, there are ammeters that use circuit power supply, but because of its high cost are quite rare.

In addition, meters are classified into ammeters:

- to calculate the DC.

- to calculate ac.

Multifunctional industrial ammeter
Multifunctional industrial ammeter

Of course, in the house alone ammeter almost nobody wants, but if you need to measure the force of the current, it is best all will be available multimeter to measure DC and AC, and lots of other useful functions. I personally I buy here.

That's all I wanted to tell you about ammeters, their unit and variety. If you liked this article, then vote her huskies and thank you very much for your attention!

I carry everything with me or how they carry it at home as a whole: a selection of photos and a description

I carry everything with me or how they carry it at home as a whole: a selection of photos and a description

In the west, such a service as the transportation of the whole house is popular. That is, you can...

Read More

Than I feed Marigolds in the spring for abundant flowering. A method proven over the years

Marigolds are my favorite flowers. And I love them not only for their beauty, but also for the fa...

Read More

What to do if the seedlings of peppers, tomatoes are stretched out. We talk about effective methods

What to do if the seedlings of peppers, tomatoes are stretched out. We talk about effective methods

Often, the seedlings of peppers and tomatoes that grow on windowsills become strongly stretched, ...

Read More