Testing insulation resistance is essential to keeping wires and motors working properly. Megohmmeters provide a quick and easy way to determine the condition of the insulation on wire, generators, and motor windings. A megohmmeter is an electric meter that measures very high resistance values by sending a high voltage signal into the object being tested. Typically, however, this is the only function a megohmmeter performs.
While megohmmeters are often informally referred to as insulation testers, strictly speaking this is not accurate. Why? What’s the difference between a megohmmeter and an insulation tester? An insulation tester performs the basic measuring function a megohmmeter does—measuring very high resistance values by sending a high voltage signal into the object being tested—and it often does much more; it usually performs more functions, including more complex testing and recording of measurements.
Read more
The need for true-RMS meters has grown as the possibility of non-sinusoidal waves in circuits has greatly increased in recent years. Some examples include . . .
Hall Effect clamp meters can measure both ac and dc current up to the kilohertz (1000 Hz) range
A deadweight tester is a proven method of pressure calibration that is usually chosen for bench applications when accuracy and reliability are the top . . .
Early reports from the field suggest that the new Fluke 772 and 773 Milliamp Process Clamp Meters may be game changers, breaking new ground for technicians . . .
Importance of investing in battery storage systems health and maintenance.
If your compressed air system is under-performing, your connected equipment will be too. Learn how to monitor and prioritize which air leaks to fix using . . .
Make energy efficiency a part of your preventive maintenance plan to make a positive impact on your bottom line, improve plant performance, and maintain . . .
At commercial buildings and industrial plants, energy costs can quickly add up, especially when older lighting systems are in place, motors age and . . .
Information on the role of thermal imagers in preventive maintenance programs, including cost savings, return on investment (ROI), and the inspection process. . . .
There are many ways to prioritize assets in a maintenance routine. Most approaches are incomplete or create more problems than they solve. Learn how to . . .
How to measure output voltage from a VFD to a motor
The arc flash boundary is the minimum “safe” distance from exposed energized conductors or circuit parts that has the potential for an arc flash. The . . .
Following electrical safety regulations in industrial plants is critical. But myths about electrical safety are rampant. Understand the facts vs myths . . .
If you troubleshoot or maintain equipment in an industrial setting, staying safe depends partly on the environment and partly on you.
This article demonstrates how to detect the 13 most common causes of winding insulation and bearing failure in advance.
Troubleshooting the most common power quality problems—voltage distortion and harmonics. Tools needed, types of problems
HVACR mechanics rarely rely on a single test to pass or fail a function or process. As they walk up to a condensing unit, they listen, they wave their . . .
Testing medical gases and piping systems in healthcare facilities and hospitals presents multiple challenges for maintenance teams. Learn why efficient . . .
