Multimeters have become must-have tools for electronic technicians. They allow them to measure voltage, current as well as a wide range of resistances, allowing technicians to do their job using a single tool rather than multiple ones. Multimeters provide a simple and easy way to check for short circuits and provide quick answers when troubleshooting electrical issues. Some multimeters can also provide readings such as duty cycle, capacity, decibels, etc. You can even add sensors and measure temperature, humidity, light levels, wind speeds, and so on.
There are many different multimeter models, so choosing the right one for you will take some careful consideration. Generally, rcd testers are separated into two basic categories – digital and analogue. Both do the job fine, but they excel at different things. So which type is right for you?
Key Differences Between Analog and Digital Multimeters
The biggest difference between analog and digital rcd testers is how they display the results of your tests. Digital testers display information on a digital screen, whereas analogue testers display it using a needle scale. With the rapid advancements of various technologies, multimeters have also advanced significantly. Analogue testers were the norm, but they were difficult to read. Digital multimeters provide accurate results on an easy to read LCD display. This removes a lot of the guesswork involved when testing, and technicians can accurately diagnose problems, as the information given on the tester won’t fluctuate on the needle scale.
On the downside, digital testers are much more expensive than their analogue counterparts. So, if you don’t need maximum accuracy, an analogue tester might be better suited for you. Keep in mind that analogue testers are still quite accurate and provide reasonable results, while costing a fraction of what digital testers cost.
If you’ve ever tested electricity, you’ll know that its flow can fluctuate. If the current fluctuates, the reading on the digital multimeter may not provide a correct representation of the current at all times. Analogue multimeters, on the other hand, can keep up with the fluctuations, as they feature a changing display. That being said, you have to consider whether fluctuation is important to your readings.
On the other hand, you have to consider how you set the scale. Digital multimeters are superior in this aspect, as they automatically set the scale and provide readings based on the scale. Analogue multimeters feature a fluctuating scale, and it’s up to you to set it properly so you get accurate readings.
And lastly, when it comes to special features, there’s a clear winner. Analogue testers do what they’re meant to do, so if that’s all you need from them – great! Otherwise, digital multimeters are probably your best choice. They come with a range of features that allow you to test for more than current, voltage and resistance. For instance, many digital testers can measure temperature, and power levels, and they have data hold, auto-ranging features and much more.
Other Things to Consider When Buying a Multimeter
Safety
Safety is one of the most overlooked factors when shopping for multimeters. That being said, it’s important to choose a model that’s suitable for the anticipated loads. Keep in mind that the more load a multimeter can take, the more expensive it will be. Multimeters are separated into a few categories based on the load they can withstand. Category 1 testers are suitable for small electronics; category 2 testers are suitable for testing portable tools and household appliances; category 3 testers are suitable for socket outlets, cables, distribution bars, motors; category 4 testers are suitable for utility and origin of installation tests.
Warranty
The warranty is another important aspect you should consider when buying a tester. If you’re going to pay hundreds if not a few thousand dollars for something, you need to make sure you get your money’s worth. The ability to return the product if faulty, or to have it repaired by a local provider can make a huge difference in your choice. At the very least, a warranty means that the manufacturer of the tester stands behind the quality of their product.
Brand
For some people, the brand of the tester will matter, while for others it won’t be a deciding factor. The brand is important to those who own sensors, chargers and other devices of a specific brand, and want to make sure they’re compatible with the multimeter. On the other hand, some testers work with any probe that features a banana plug. Ideally, the tester should come with decent probes, but a multimeter that has decent replacement probes at a better price might be more attractive than a cheap multimeter that requires you to buy a new device if a key component malfunctions. Some of the most popular multimeter brands include Kyoritsu, INNOVA, KAIWEETS, Etekcity, Plusivo, Crenova and AstroAI.
