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Direct current voltage (DC voltage) is a fundamental concept in electricity and electronics. Unlike alternating current (AC), which reverses direction periodically, DC voltage flows steadily in one direction. DC voltage is found in a wide variety of applications in both household electronics and industrial systems. Understanding DC voltage is important for electrical troubleshooting and knowing which tools to use to take measurements.Ready to learn how to measure DC voltage with a digital multimeter?...

HVAC technicians rely on their tools to diagnose and repair issues quickly and accurately. The Fluke 116 HVAC Digital Multimeter is built specifically for HVAC professionals, offering measurement capabilities like voltage, resistance, capacitance, temperature, and microamps. Below are 10 common HVAC issues and how to troubleshoot them effectively using the Fluke 116.

Calibrating thermometers is a critical process that ensures accurate temperature measurements, whether for industrial processes, scientific research, or food safety compliance. One popular approach is the ice point method, a straightforward technique that uses the freezing point of water (0 °C, 32 °F) as a reference. While convenient, this method falls short for professionals in industries utilizing temperature sensors who require traceable, multi-point calibration to meet rigorous calibration...

What is a Clamp Meter?A clamp meter is an electrical testing device that combines a basic digital multimeter (DMM) with a current sensor. It measures current by clamping around a conductor, eliminating the need for direct contact or circuit interruption.Want to learn more about what a clamp meter is? Read this article with visual aid to help you navigate the buttons and features of a basic clamp meter.How Does a Clamp Meter Work?Clamp meters detect the magnetic field generated by current flowing...

By Sean Anderson, Fluke Application SpecialistIf you work in HVAC, you already know your tools can make or break your day. There’s nothing worse than troubleshooting a stubborn system with a multimeter that wasn’t built for the job. That’s why I always keep the Fluke 116 Digital HVAC Multimeter on my belt. It’s compact, accurate, and, most importantly, built with HVAC techs in mind.Let’s break down why this tool is a must-have and how it makes long days in the field a little easier.Learn...

By Sean Anderson, Fluke Application SpecialistFor many buyers, the choice between a True-RMS multimeter and a more affordable, average-responding meter can be confusing. While True-RMS meters excel at measuring distorted or non-sinusoidal waveforms, they do cost more. So, when is that extra expense worth it?What is true-RMS? Watch this video to learn about true-RMS and average-responding meters.If you don't need true-RMS, you should check out this article comparing the Best Fluke Digital Multimeters...

What is an Ampere?An ampere (AM-pir), or amp, is the international unit used for measuring current. It expresses the quantity of electrons (sometimes called "electrical charge") flowing past a point in a circuit over a given time.See how amperes, or Amps, are measured with a digital multimeter in this step-by-step article on measuring current with a clamp accessory.Fluke Electrical Test and Measurement ToolsWhat is a CAT Rating?Category (CAT) ratings define the electrical environment in which a tool...

Cable management has an important but often overlooked role in calibration lab setup. Cables and leads that aren’t managed or maintained correctly can introduce uncertainties that influence measurements and ultimately impact calibration accuracy.In fact, improper lead and cable management is the leading cause of measurement errors in the laboratory. However, setting up a calibration lab using best practices for cable management helps eliminate these errors. In this article, we’ll cover how cables...

It might not be something we always think about, but pressure measurement affects us every day. From tire pressure to industrial machinery, accurate pressure readings keep things safe and working properly. In the United States, a common unit for pressure is pounds per square inch (PSI). However, there are less common variations of PSI — pounds per square inch gauge (PSIG) and pounds per square inch absolute (PSIA). Simply put, these variations on the PSI provide more information about what’s...

The triple point of water is critical for the accuracy of temperature measurement worldwide. This natural phenomenon has provided the foundation for scientific standards and is indispensable for metrologists working in diverse industries today. Its precise and reproducible nature ensures global consistency in calibrations, making it a key driver of technological innovation and scientific discovery.Fluke 5901 Triple Point of Water Cells In this article, we’ll discuss what a triple point is, what...

Accurately measuring temperature is critical across industries. The two most common tools for this task are two sensors: Resistance Temperature Detectors (RTDs) and thermocouples. While both serve the same purpose, they differ significantly in design, function, and application. Choosing the right one can directly impact the precision, efficiency, and safety of your processes.This article explores the key differences between RTDs and thermocouples, including how they work, their strengths and limitations,...

Oscilloscopes are indispensable tools in industries from aerospace to automotive manufacturing. By detecting and providing visualizations of electrical signals over time, they play a crucial role in helping experts diagnose electrical issues and analyze signal integrity. However, the accuracy of an oscilloscope can drift over time due to environmental factors, regular wear, and component aging. This drift can lead to inaccurate oscilloscope measurements, potentially causing costly errors, safety...

Pressure is all around us, affecting us in a multitude of ways every day. From the moment you wake up, you’re interacting with different kinds of pressure in manners you might not even think about. Any time you grab or push something, you’re exerting pressure on it. Even just sitting in a chair is creating pressure. It’s a crucial building block of physics.In this article, we’ll cover what exactly pressure is and the different types of pressure that you can measure.What Is Pressure?Pressure...

Electrical measurement is the backbone of technology. By measuring electrical currents, we can learn different things about the function and performance of machinery, digital technology, and more. Electricity runs our society, and being able to measure and quantify is as important now as ever. In this article, we’ll explain what exactly electrical measurement is, its common units of measurement, and what kind of tools are utilized in that measurement.What Are Electrical Measurements?Electrical...

Metrology can be defined simply as the science of measurement, but it’s rarely that simple in practice. Measurements touch nearly every part of life, and that means metrology does as well. However, as a field, metrology is not a pillar. It’s made up of both larger subfields and more niche branches, and to better understand the work metrologists do every day, it’s important to know the differences between these types of metrology.Introduction to MetrologyAccording to The International Bureau...

Measurements require precision, and precision requires proper calibration. However, when calibrating how do we know what a precise unit of measurement actually is? That’s all thanks to metrology.In this article, we’ll discuss what metrology is, why it’s important, which sectors and industries rely on metrology, and more.What Is Metrology?Metrology is the science of measurement. It’s what establishes the standard measurements used not only in important scientific research but in every facet...

By Sean Anderson, Fluke Application SpecialistImagine you’re on an oil rig, surrounded by salty sea spray and high winds. Or perhaps deep underground at a mine where dust threatens to impair your tools. In these environments, a standard digital multimeter (DMM) simply won’t cut it. That’s why selecting the right one that meets the stringent requirements for durability and safety that align with where you work is essential.This guide evaluates how four standout Fluke DMMs—the 87V, 87V MAX,...

In the field of photovoltaic (PV) module testing, two common methods are used to assess the performance and health of solar panels: I-V curve tracing and open circuit voltage (Voc)/short circuit current (Isc) testing. While both methods provide valuable insights, they differ significantly in their diagnostic capabilities and the depth of information they offer. This article evaluates both methods.

In the world of photovoltaic (PV) system testing, three standout products by Fluke Corporation, which now includes Solmetric instruments, are the Fluke SMFT-1000 and the Solmetric PVA-1500T2 and PVA-1500HE2. These tools are designed to ensure the optimal performance and safety of solar installations, but they cater to slightly different needs and preferences in the solar industry. This blog post will explore the features, applications, and specific advantages of each tool, helping professionals in...

Fluke Calibration recently hosted a webinar (now available in its entirety as free and on-demand) in which a panel of Fluke associates talked about lessons learned and best practices for working, when some employees can work remotely and others must go to the calibration laboratory

In this blog post by Fluke Calibration, see the 5 best practices for calibrating flow meters to ensure optimal flow meter performance. Read here.

Learn what a calibration interval is, variables that affect it, who is responsible for setting it & how to establish one for your measurement equipment.

Get answers to common questions about the safety of a high-pressure supply & the capabilities of the Fluke 8270A/8370A High-Pressure Controller/Calibrator.

The first version of MET/CAL that I saw was version 0.86 – it was a pre-release. I was working at the Fluke/Philips service center from 1990 to 1994, here in Holland. In the beginning of the 90’s in this lab they started using MET/CAL, starting on very simple PCs, now it is one of the most advanced labs in using MET/CAL.

Discover Fluke resources on how & why to prevent contamination in pressure calibration including videos, webinars, and blog posts. Learn more here.

Whether you’re speaking to a small group of colleagues at your company or a group of professionals at MSC or NCSLI, here are some tips to help you succeed – and perhaps even enjoy your experience as a public speaker.

Get the quickest answers and fixes when calibration software errors pop up.

Learn how MET/CONNECT Calibration Integration Software allows you to use MET/CAL Software without an asset management application or with the one of your choice.

Writer’s block isn’t limited to metrologists, of course – it’s a universal problem that people in many professions face (even writers). Here are a few simple tips that can help you on your way to greater visibility and respect in your career.

See how Fluke’s long-scale DMMs enable digitizing with emulation, characterization of non-repetitive waveforms & lighted connection terminals. Learn more.

See this illustrated blog post to learn how to do a comparison calibration of a probe-style RTD at one temperature point using a dry-block calibrator.

See two options for mixing fluids in a high-pressure calibration without fear of contamination. Read the short blog post by Fluke here.

To perform a test on a pressure gauge using a pressure comparator and a reference gauge, follow the steps at this blog post by Fluke Calibration.

How do you choose a multi-product electrical calibrator? They are not all the same. Read this short blog post to learn seven essential points to consider.

Read this short blog post to see how Fluke Calibration contributes in this year's World Metrology Day theme, “Measurements and Light”.

Fluke Calibration produces the broadest range of electrical, RF, temperature, pressure & flow calibration instruments & software that help measurement professionals around the globe.

Table of ContentsWhat is a calibrator?How is a calibrator used?Why is calibration important?When did people start using calibrators?What are the different types of calibrators?Who uses calibrators?How often should a calibrator be used?How do you automate calibrators?When should you upgrade an old calibrator?What is the price range of calibrators?A Variety of CalibratorsWhat is a calibrator?A formal and technical definition of “calibrator” is “a measurement standard used in calibration.” This...

Hi, this is Jeff Grossman, Sales Engineer for Fluke Calibration’s pressure and mass flow calibration solutions, here to provide you with a demonstration of one of our three modular pressure controllers. I happen to have here the 8270A which has a maximum pressure of 6000 psi complemented by the 6270A maximum pressure of 3000 psi and the 8370A with maximum pressure of 15,000 psi. The nice thing is they share a lot of commonality which makes them easy to switch between and easy to use.Very small...

a.anchor { scroll-margin-top: 100px; scroll-snap-margin-top: 100px; } Calibration is configuring and verifying a measuring instrument's accuracy to ensure its readings match a known standard. It’s a foundational practice across healthcare, electronics, manufacturing, and environmental monitoring.Instruments naturally experience wear, drift, and environmental impact over time, which can compromise their performance. Calibration restores their accuracy and ensures consistent, reliable operation that...

Acoustic imaging technology has emerged as a transformative tool in various industries, offering a novel approach to sound analysis. It provides precise visual representations of sound sources, contributing significantly to industrial maintenance, enhancing reliability, and ensuring safety. In this article, we will explore the fundamentals of acoustic imaging, its industrial applications, and the benefits it offers.Understanding Acoustic Imaging TechnologyAcoustic imaging technology excels at converting...

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...

Get step-by-step instructions on how to accurately calibrate a hygrometer or other humidity sensor including why it’s important, techniques, and tips.

What is Shaft Alignment? Shaft alignment is a crucial process in maintaining and operating various types of machinery, including pumps, motors, and fans. It involves aligning the rotational centers of mechanical shafts to ensure they form a straight line. Proper alignment is essential for the efficient operation of rotating machinery. Misalignment, even at minimal levels, can lead to significant issues, such as increased vibration, premature wear of parts, and, ultimately, machine failure. Why is...

Vibration measurement is an integral part of maintaining the health and performance of industrial machinery. It involves quantifying the oscillations and movements within the machinery to identify potential faults before they lead to significant issues. This guide dives into vibration measurement, discussing its importance, the methods used for measuring, the standard units of measurement, and the advanced tools utilized for accurate monitoring and analysis. What is Vibration Measurement? Vibration...

The purchase accelerates AI-enabled predictive maintenance for Fluke Reliability customers.

Support related questionsProduct related questionsCalibration related questionsLearning and training related questionsGeneral topic questionsSupport-related questionsHow can I request a repair for my Fluke meter?Visit our support page: Request RepairCan I find software downloads on your website?Yes, you can find software downloads here: Software DownloadsWhere can I find replacement parts for specific Fluke models?For replacement parts, please visit: Replacement PartsHow can I connect my Fluke device...

The NFPA changed its recommended practice for electrical equipment maintenance to a standard. This means that proper maintenance is now required to keep electrical systems safe and reliable for workers. The purpose of NFPA 70B is to safeguard persons, property, and processes from risks associated with electrical equipment malfunction or failure. Maintenance is crucial for achieving this goal.Fluke Ti480 PRO Infrared Camera is one of many Fluke thermal imagers available to help technicians comply...

A professional-grade wire tracer helps electricians trace wiring through walls, under floors, and in tight spaces without time-consuming guesswork. Here we explain how a wire tracer works to help an electrician locate a fault quickly and what they should look for when selecting a wire tracer for their tool kit.

a.anchor-link { scroll-margin-top: 150px; } ul.checkboxes > li { list-style-type: "\2610"; padding-left: 10px; } ul.checkboxes ul { list-style-type: disc; } Infrared building inspection checklistSelect the right thermal cameraWhat to look for during a home inspectionWhat is thermal imaging?Thermal cameras are used as a key technology for building inspection work worldwide, allowing many building professionals to work faster, saving you time in the field, spot and document hidden issues during your...

Marathon Petroleum Company in the U.S. has received an award for their use of acoustic imaging in the turnaround process. The innovation award recognizes Marathon for “improving process safety by deploying a device that detects leaks, which often can’t be seen or heard, through the sound frequencies they emit.” The press release from Marathon continues, “The Fluke Acoustic Imager pinpoints leaks up to 400 feet away and displays them on its LCD screen, using color variations to form a visual...

For more information:Karin Koonings(425) 446-4893karin.koonings@fluke.comFluke Corp. celebrates World Engineering DayThe company joins the world in recognizing engineering’s achievements and its role in supporting sustainable developmentEVERETT, Wash., March 4, 2021 – Fluke Corp. joins the United Nations Educational, Scientific and Cultural Organization (UNESCO) in celebrating World Engineering Day 2021 (WED2021) on March 4th. Themed “Engineering for A Healthy Planet- Celebrating the UNESCO...

Learn about solar PV non-load break disconnect requirements designed to not interrupt current.

Learn how acoustic imaging cameras detect leaks, leak source factors and properties, leak type classification and leak rate quantification.

Continuously monitor and analyze vibration readings for production-critical assets.

AC frequency is the number of cycles per second in an alternating current (AC) sine wave.

Current is the rate at which electrons flow past a point in a complete electrical circuit.

In compressed air, gas, and vacuum systems, maximizing capacity is better than adding, according to Jason Dupriest, Industrial Systems Analyst/Designer, of ADG Concepts out of Fort Worth, Texas. Starting from consultation to design and carrying on through to implementation, ADG projects range from single equipment installations to large, multiple equipment and central systems, at some of the largest manufacturing and production facilities.   Inspecting compressed gas lines in a natural gas...

Baseline and trend your machine health monitoring in one place to analyze and troubleshoot issues quickly and efficiently.

When a load is turned ON and OFF several times per second, this is duty cycle. It's the ratio of time a load or circuit is ON to the time a load or circuit is OFF. This is done to control things like lamp brightness, heating element outputs, or magnetic strength of a coil, for example. Many loads are rapidly cycled on and off by a fast-acting electronic switch to accurately control output power at the load.When measuring duty cycle, a digital multimeter displays the amount of time the input signal...

Continuity is the presence of a complete path for current flow. A closed switch that is operational, for example, has continuity. A continuity test is a quick check to see if a circuit is open or closed. Only a closed, complete circuit (one that is switched ON) has continuity. During a continuity test, a digital multimeter sends a small current through the circuit to measure resistance in the circuit. Ready to learn how to safely test continuity with a digital multimeter? Read the Fluke step-by-step...

A multimeter determines capacitance by charging a capacitor with a known current, measuring the resulting voltage, then calculating the capacitance.A good capacitor stores an electrical charge and may remain energized after power is removed. Before touching it or taking a measurement, a) turn all power OFF, b) use your multimeter to confirm that power is OFF and c) carefully discharge the capacitor by connecting a resistor across the leads. Be sure to wear appropriate personal protective equipment.Looking...

Learn how to test continuity using a digital multimeter.

Resistance is measured using analog or digital multimeters. These tools also measure current, voltage, and more for various applications. Why measure resistance? To determine the condition of a circuit or component. The higher the resistance, the lower the current flow, and vice versa.In general, the resistance of components used to control circuits (such as switches and relay contacts) starts out very low and increases over time due to factors such as wear and dirt. Loads such as motors and solenoids...

Circuits and equipment may be designed to operate at a fixed or variable frequency. They may perform abnormally if operated at a different frequency than specified.For example, an AC motor designed to operate at 60 Hz operates slower if the frequency is less than 60 Hz, or faster if frequency exceeds 60 Hz. For AC motors, any change in frequency causes a proportional change in motor speed. A five percent reduction in frequency yields a five percent reduction in motor speed.Looking for your first...

Measuring DC voltage accurately is essential for diagnosing electrical systems, troubleshooting circuits, and ensuring proper functionality of components such as batteries, power supplies, and motors. A digital multimeter (DMM) is a versatile tool that simplifies DC voltage measurements, providing precise readings with minimal effort. Understanding the correct procedures, such as selecting the appropriate settings, connecting the test probes properly, and interpreting the display, ensures accurate...

How to cultivate a company culture where employees take the necessary steps to build a culture of safety

Make energy efficiency a part of your preventive maintenance plan to make a positive impact on your bottom line, improve plant performance, and maintain uptime.

How to perform a verification test on analog vs digital pressure gauges. Both analog and digital process gauges need to be verified to detect errors related to drift, environment, electrical supply, addition of components to the output loop, and other process changes

Inspecting electrical utility substations and lines with thermal imaging. What to expect and what you might find.

Variable-speed motors and drives are normally much more efficient than fixed-speed types, but even they don’t always work at peak efficiency. An analysis of VSDs at one drinking water pumping station helped save over 20% of energy costs – repaying many thousands of Euros every year.Load measurement at input and output of a VSD The main energy cost for water companies comes from pumping water up from the well and through the network. Variable-speed drives match output to demand and so help minimize...

With all Power Meters, Power Quality Analyzers, Energy Loggers or Power Loggers you can measure quite a number of Power parameters. In fact, the number of variables these instruments can measure, log and store is in many cases overwhelming. Imagine yourself setting up, downloading and analyzing a 32GB file with a logging of 500+ parameters over a month period…..So, wishing for “I want to log everything” is in most cases not the best idea, and certainly not the most efficient way. This leaves...

Large three-phase motors and the equipment they drive should consume power equally from each of the three mains phases. However, that often doesn’t happen. Unbalance and harmonics can cause instability, with motor vibration that reduces both efficiency and lifetime. Unbalance can also cause malfunctions in single-phase loads. All this can reduce your power quality, leading to punitive penalty charges from your utility.In this blog, we will describe balanced three-phase power systems – where each...

How to measure current with a digital multimeter plus clamp accessory.

Using a multimeter that provides the right measurements is important. Knowing what those measurements mean is even more important. Accuracy and precision ensures the measurements you take will be useful; higher precision enables easier repeatability and higher accuracy means the your readings will be closer to perfect.Looking for a multimeter recommendation? Adam Savage from MythBusters has a few you might be interested in. Read the article and watch the video for details.What is the Accuracy of...

If you troubleshoot or maintain equipment in an industrial setting, staying safe depends partly on the environment and partly on you.

Seeing a motor’s heat signature under normal operating conditions—with at least 40 % of design load—can tell you a lot about its condition.

Following electrical safety regulations in industrial plants is critical. But myths about electrical safety are rampant. Understand the facts vs myths about working in energized systems.

Solar installer jobs are in high demand. Learn how to become a solar panel PV installer or solar energy technician and join the growing renewable energy industry.

Solar energy expert guidance on how to design and commission a photovoltaic system for maximum performance including longevity of equipment, safety and ROI.

.super-custom .fluke-icon { margin-right: 20px; font-size: 2.2rem; } .super-custom a { color: #212121; text-decoration: none; } .webinarAsset a { text-decoration: none; color: #369; } A Product Specialist will be in touch with you shortly. In the meantime, check out this blog post on "Troubleshooting photovoltaic systems".   Join the Fluke Community You’ll get: Fluke discounts, promotions and the latest news Innovative tips on using Fluke products Exclusive product previews and more ‍‍...

Guide to integrating thermal imaging into your preventive maintenance program. Get ROI on using thermal cameras for inspections.

What is the difference between an insulation tester and a megohmmeter? Compare insulation meters, testers, megohmmeters, and meggers to learn about what's best for your needs.

Voltage tester pens offer a quick and non-invasive method to detect live circuits. Understanding their operation, proper usage, and how they compare to tools like multimeters can help you choose the right instrument for your electrical tasks.

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Supplemental Curriculum for Practical Measurement Application Training from the Fluke Learning LibraryBridge the gap between theory and application with materials designed to explain what measurement to take in which situation, with which kind of test tool, and how to use the information you gather.Online Training CoursesFREE, 4-Hour self-paced topics include:Digital Multimeter BasicsElectrical Measurement SafetyInsulation ResistanceMotor & Drive TroubleshootingLearning and Troubleshooting ArticlesHow...

Last Updated: Sept 27, 2013 PLEASE READ THESE TERMS OF USE CAREFULLY. BY ACCESSING OR USING OUR websites, mobile applications or other products or services, YOU AGREE TO BE BOUND BY THESE TERMS OF USE AND ALL TERMS INCORPORATED BY REFERENCE. IF YOU DO NOT AGREE TO ALL OF THESE TERMS, DO NOT USE OUR WEBSITES, MOBILE APPLICATIONS OR OTHER PRODUCTS OR SERVICES. These Terms of Use ("Terms") apply to your access to, and use of, the websites, mobile applications and other products or services (collectively,...

A diode is a semiconductor device that essentially acts as a one-way switch for current.

Learn how infrared cameras measure heat signatures and use color palettes, spatial resolution, and proper focus to create a thermal image.

Voltage is the pressure from an electrical circuit’s power source that pushes charged electrons (current) through a conducting loop, enabling them to do work such as illuminating a light.

Ohm’s Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit.

With the growing concern about mold damage and associated health problems, inspectors are becoming increasingly vigilant in checking for areas of moisture within the confines of the building envelope. Weather related damage and flooding, and subsequent mold growth, have also escalated the need for tools that can facilitate fast and accurate moisture investigations.

Capacitance is the ability of a component or circuit to collect and store energy in the form of an electrical charge.

A digital multimeter (DMM) is a test tool used to measure two or more electrical values—principally voltage (volts), current (amps) and resistance (ohms).

Resistance is a measure of the opposition to current flow in an electrical circuit.

Duty cycle is the ratio of time a load or circuit is ON compared to the time the load or circuit is OFF.

Troubleshooting an electrical panel overheating problem from unusual causes; testing with the power on, ruling out harmonics—and the resolution.

Anyone who makes their living by working with electricity quickly develops a healthy respect for anything with even a remote chance of being "live." Yet the pressures of the getting a job done on time or getting a mission-critical piece of equipment back on line can result in carelessness and uncharacteristic mistakes by even the most seasoned electrician.

Part 4 of this five-part series describes capturing and analyzing waveforms with a portable oscilloscope, answering that key question, "How do I know if a waveform is good or bad?". You can view Part 3 of this series, Triggering and Isolation. You can also view the complete webinar with audio and animations at the Fluke Training Center.

Loop Calibration - The new Fluke 707 Loop Calibrator is a cost-effective, integrated solution for calibration, repair and maintenance of current loops.

The Fluke 709 mA loop calibrator is designed to save time and produce high-quality results.