Safety is the most important thing and you should always remember that. There are devices that can be called essential and one of them is an ammeter . It is used to measure the intensity of electric current. It is worth learning more about it.
Check ammeters at the Onninen wholesaler
How to connect an ammeter?
Connecting an ammeter requires some knowledge, but in principle it is not very difficult. Let's start with the fact that there are two types of ammeters. The first are analog devices that indicate the value by the deflection of the device's pointer. The second are digital ammeters, which are currently the most commonly used. They are equipped with electronic circuits. If you want to measure the current flowing through a conductor, you must connect the ammeter in series so that the current you want to measure flows through the ammeter. You also need to know that connecting in series means that the ammeter is part of the circuit. It is necessary to measure the voltage on the shunt, i.e. a resistor with minimal resistance. This is where the potential difference is created, which the meter indicates. The measurement error cannot be large in principle, because the internal resistance is close to zero. To connect an ammeter to a circuit, you need to perform a few steps.
- Turn off the power before connecting the ammeter, otherwise there is a risk of electric shock.
- Select measurement mode - before connecting, select the measurement mode, e.g. serial or parallel
- Choose the right connection point - this means that you need to connect the ammeter in the place where the current flows
- Connect an ammeter - remember that in series mode, there may be circuit resistance, which in turn reduces the current/
- Take a measurement - turn off the power and take a measurement.
Ammeter - diagram
An ammeter is a meter that provides the most effective measurements. Here, the diagram plays a major role. This means that we connect the ammeter to the branch in which we want to measure the current intensity. The current intensity I is the ratio of the charge Q that flows through the cross-section S. Using an ammeter, we measure the current intensity I in the circuit. The entire current in a given section of the circuit flows through this device, which means that the least resistance occurs, and therefore this guarantees optimal results. In this case, the diagram shows the voltage U, which is the difference in potentials understood as V1 - V2.
Symbols in an ammeter
In electrical circuit diagrams, specific symbols are used that are intended for the ammeter. These include:
- k, which means that the ammeter terminals are short-circuited;
- R - means resistance;
- the voltage is calculated using the formula U=RI;
- I - current intensity;
- Q - charge ratio
- S - cross section of the medium;
- mΩ - electrical resistance expressed in milliohms on the dial of an analog ammeter;
- μH - electrical inductance expressed in microhenries on the dial of an analog ammeter.
Digital multimeters are often used as measuring tools on ammeters. They can be used to measure various quantities such as current, voltage, resistance, capacitance, inductance or even temperature. Some devices have additional outputs to check the correct operation of transistors. Smaller ranges can be measured on the terminal responsible for measuring voltage. If, for example, you want to measure larger currents, it is better to change the range and terminal. Resistance measurement is performed using an internal current source using Ohm's law.
Ammeters in the Onninen electrical wholesaler
We encourage you to familiarize yourself with the offer of the Onninen electrical wholesaler . When looking for good ammeters, it is worth choosing the EMAS ammeter , and specifically the RDA1A model. This is a portable digital ammeter. It is used to measure the intensity of direct current, but also alternating current. It provides extremely precise measurements that appear very quickly on the LED display. The PROMET NEF30 MC digital meter AC ammeter is also a great choice. It is small. It is used to measure current in the range of 1A directly or from a transformer. It is additionally equipped with a current loop indicator and a bargraph. You can also choose the PROMET 5A AC ammeter . It provides a measurement range of 5A, it is made of strong plastic. Like the previous devices, it has the same degree of protection, i.e. IP 65. It is used to measure current directly or from a transformer.