Insulation testers are handheld devices but can be portable with a handle or bench-mounted. Testers usually have an LCD or digital display, but some have the more traditional analogue needle, such as the Megger MIT310A.

How do insulation resistance testers work?

Testing the integrity of insulation requires measuring its resistance to current flow across it. Testers use a high voltage, low current DC charge to measure the resistance. A high level of resistance means that very little current is escaping through the insulation. Conversely, a low level of resistance indicates a significant amount of current may be leaking through and along the insulation.

What is the purpose of insulation testing?

Ideally, all the electrical current sent along a conductive wire should reach its intended destination. However, you do find that some of it is lost along the way due to various reasons. Wires are insulated with a resistant sheathing to contain the conductivity of the copper or aluminium core, but even with this insulation in place, some of the current still manages to escape. The electricity that leaks out can be detrimental to electrical circuits and machinery. Testing can help you determine whether the insulation is performing at an effective and safe level. Excessive heat or cold, moisture, vibration, dirt, oil, and corrosive vapours can all contribute to deterioration; therefore, routine testing can identify problems before they result in injury or equipment failure. Insulation testers provide noise-free, reliable results. They are safe and easy to use and the ideal solution for troubleshooting, commissioning, and preventative maintenance applications.

What is a Fluke Insulation Tester Used For?

A Fluke insulation tester is an essential piece of electrical test equipment used for measuring the electrical resistance in wires, cables, and other materials. In other words, it helps ensure that wiring systems are correctly insulated from their surroundings or from each other to prevent electric shocks or fires.

Fluke insulation testers measure the levels of dielectric strength in wiring or cables, which refers to its ability to resist breakage when exposed to a high voltage. This ensures that your system is safe and not likely to fail due to faulty insulation.

How do I choose an Insulation Tester?

When choosing an insulation tester, it is important to consider the type of material being tested and the available test voltages. There are two main types of testers: digital insulation testers and analogue resistance testers. Digital insulation testers offer higher accuracy with a wider range of test voltages compared to their analogue counterparts. It is also important to consider safety features such as overvoltage protection when selecting an insulation tester.