The digital multimeter (DMM) is a mainstay of electrical troubleshooting and the tool that most of us reach for first. They are versatile devices that can measure electrical properties including voltage, current, and resistance. Multimeters can also quickly identify faults, shorts, and open circuits, as well as test components like capacitors and resistors.They’re especially helpful when troubleshooting issues in variable frequency drives (VFDs). VFDs are a type of motor controller that adjusts...

Troubleshooting electrical components is a necessary part of keeping equipment functioning. The best tool to use for preliminary troubleshooting in a DC power supply is a digital multimeter (DMM).Digital multimeters are easy to use and can measure voltage, which is important for pinpointing problems with a DC power supply. Here, we’ll discuss the basics of DMMs and how to check the input and output voltages on a DC power supply when troubleshooting.Understanding Digital MultimetersDigital multimeters...

A multimeter is arguably the most important tool an electrician has in their toolbelt and the first thing most reach for in the beginning phases of troubleshooting. When identifying issues with rotary encoders in conveyor systems, the multimeter can help detect a range of problems before turning to more specialized equipment.In this article, we’ll discuss how to use a multimeter to troubleshoot rotary encoders and walk through step-by-step instructions.Understanding Rotary EncodersA rotary encoder...

In this guide, we will explore how to use a multimeter to perform various measurements and tests. Multimeters are versatile tools used by electricians and hobbyists alike to diagnose electrical problems and ensure the proper function of electrical devices. We'll explain how to measure AC and DC voltage, test for continuity, measure capacitance, measure frequency, and test diodes. Though the exact procedures may vary slightly depending on the specific multimeter model, the fundamental principles...

Every HVAC technician knows that no two jobs are the same. One day, you might be troubleshooting a failing compressor in a rooftop unit, and the next, balancing airflow in a residential home with uneven heating. Each specialty — residential, commercial, and industrial HVAC — comes with its own challenges and tool requirements.The Fluke 902 FC HVAC Clamp Meter in action.Every technician needs accurate, reliable tools designed for the specific demands of their work. But before choosing tools based...

Classic methods for pressure switch testing have been superseded with the introduction of new pressure test tools. Today most pressure switches are tested with a pressure gauge mounted to a pump to supply and measure pressure, and a digital multimeter set to continuity to verify the opening and closing of the switch. The technician or electrician making the test is required to interpret the pressure applied to the switch when the continuity beeper sounds indicating contact closure of the switch....