Learn Effectively How to Use an Ammeter for Electrical Testing


Using an ammeter is becoming an increasingly common task among experienced and novice electrical engineers and technicians alike. An ammeter is a device that is used to measure the amount of electric current running through a circuit. This type of device makes it easy to measure the amount of current passing through a circuit and to check how efficient a circuit is.

Whether you are planning to repair a busted fuse, or checking the current flow on a power socket, here is a simple guide on how to use an ammeter correctly.

The first step is to familiarize yourself with the type of ammeter you are using. There are two basic types of ammeters: analog and digital. An analog ammeter makes use of a needle similar to that found in a compass needle. It points to the particular amount of current that passes through the ammeter. A digital ammeter displays the measured current on a liquid crystal display.

Learn Effectively How to Use an Ammeter for Electrical Testing

When using an ammeter, it is important to exercise caution. Ensure there are no live wires connected to the energy source you are working with. To be safe, make sure you are wearing gloves and that the electrical circuit, battery and all other materials are undamaged.

Learn Effectively How to Use an Ammeter for Electrical Testing

Next, you will want to set up your circuit. A simple example of a circuit would be a battery connected to a lamp. The battery has both a positive and negative terminal. Both are connected in a series to the lamp. Disconnect a part of the circuit to make way for the ammeter. The ammeter should always be connected in series, inserting it into the disconnect.

Connect the two leads of an ammeter to the device. The red lead should be connected to the positive terminal and the black lead should be connected to the negative terminal. Secure these leads by using alligator clips. Connect the red lead to the wire nearest the positive terminal of the battery or power source and the black lead go on the wire closest the negative terminal of the power source. It is absolutely essential that you connect the right lead to the right terminal; otherwise, the device will not work properly and could malfunction.

Learn Effectively How to Use an Ammeter for Electrical Testing

Reading the current measured by the ammeter will depend on the type of device used. For analog ammeters, simply read the smallest division on the scale and round off the next digit. The needle will point to the approximate amount of amperage. In digital ammeters, there are no complex calculations needed; the amount of current is displayed on the LCD screen.

With these simple instructions, now you know how to use an ammeter safely and accurately. Make sure to exercise caution when working with electrical equipment and always double-check your connections. With the right precaution and device knowledge, you can be sure to get accurate measurements for your electrical repairs, installations and projects.

  • February 14, 2020