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...

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...

by Michael Crepps, Fluke Product Application SpecialistAs a residential electrician, you are often called upon to troubleshoot electrical issues in homes. One common problem you may encounter is a non-working outlet. Diagnosing and fixing this issue efficiently is crucial to maintaining client satisfaction and safety. This application note provides a step-by-step guide on how to use a circuit breaker finder to troubleshoot a non-working outlet, ensuring you can quickly identify and resolve the problem.Scenario:...

The digital multimeter (DMM) is an important tool for electricians. It’s often the first tool one reaches for when troubleshooting electrical problems, including issues with proximity switches in conveyor systems.    DMMs can take measurements such as pulse voltage and frequency, which are necessary for understanding the extent of proximity switch damage. While the multimeter is an excellent tool for getting started, an oscilloscope will ultimately provide the full breadth of information needed...

A digital multimeter (DMM) is the first tool most of us reach for when troubleshooting an electrical issue. It provides a variety of measurement features that can help isolate a problem or narrow down the list of potential issues. Troubleshoot Transient Voltages in VFDs Using a Digital MultimeterWhen troubleshooting a variable frequency drive (VFD), a multimeter is an excellent tool to start with. Variable frequency drives are motor controllers that vary the frequency and voltage of power supplied...

By Michael Crepps, Fluke Product Application SpecialistIn industrial plants, maintaining the reliability and safety of electrical systems is critical due to the complexity and scale of operations. Electrical faults can lead to significant downtime and safety hazards. A wire tracer is an essential tool for troubleshooting and maintaining electrical systems, allowing technicians to accurately locate wires, identify faults, and ensure proper connections. This application note provides a step-by-step...

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,...

By Michael Crepps, Fluke Product Application SpecialistIn industrial plants, understanding the layout and connections of electrical circuits is crucial for maintenance, troubleshooting, and system upgrades. Accurate circuit mapping helps technicians identify the path and connections of wires, ensuring safe and efficient work.  Fluke 2052 Wire Tracer mapping industrial circuitsA wire tracer is an essential tool for creating detailed circuit maps in industrial settings. This application note provides...

By Will White, Fluke Solar Application SpecialistIn the solar industry, safety and accuracy matter when selecting the right tools for the job. Knowing which category (CAT) ratings and voltage ratings are required for an application can make the difference between a safe, efficient job and one fraught with risk. These ratings guide professionals in selecting tools that are built to handle different electrical environments — ensuring safety and compliance while minimizing equipment damage.What Are...

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6003A Customer EOL Letter.pdf (91.11 KB)Effective April 2, 2021, Fluke Calibration will cease production and sale of the 6003A Three Phase Electrical Power Calibrator and all its unique and specific accessories and options. Fluke introduced this model in 2014 as a competitive calibrator capable of supplying accurate 3 phases of current and voltage. The Fluke 6130B is the closest replacement for the 6003A. While there is no direct replacement for the 6003A, the 6130B offers significant benefits in...

Fluke Calibration offers instrument repair and calibration services for electrical and RF calibration equipment through our accredited calibration laboratories in Everett, Washington (see our Authorized Service Centers page for service outside of the US). Our prices are competitive and our turnaround times are excellent.Equipment types include:Frequency countersMulti-product and multifunction calibratorsVoltage, current and resistance calibratorsProcess calibratorsStandard resistorsZener reference...

Ruska Instruments, founded in 1944 in Houston, Texas, grew from a small manufacturer of PVT (pressure, volume, temperature) instrumentation to a leading global manufacturer of precision laboratory pressure instrumentation.  Its deep tradition of pressure metrology makes it a household name in National Metrology Institutes and in other worldwide organizations with demanding pressure calibration needs.  The Ruska brand features primary pressure standards, transfer standards, air data test sets, accessories,...

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...

There are five vital measurements that could be causing problems in your electrical distribution system that you may be missing even with a True-rms digital multimeter. While the digital multimeter is a valuable and indispensable tool for the electrical professional, it does have limitations. A multimeter may be able to alert you to one of these five issues, but be prepared to use a power quality analyzer to dig in further and uncover these hidden potential problems.Those measurements are:1. Harmonic...

Operator: Roel van Hees, Operational Maintenance EngineerCompany: TenneT TSO BVApplication: Addressing corona discharge issues affecting rail clamps at a substation in the Netherlands that were causing communication issues at Rotterdam The Hague AirportResult: Communication between the airport control tower and pilots is now back to normal. Any potential safety issues were averted.When TenneT got a call from the Dutch Radiocommunication Agency to investigate an issue at one of its substations that...

耐用的 EVA 泡沫包和隔板便于安全携带大多数万用表

The need to measure three-phase electrical systems has become increasingly important, especially for simple energy surveys, more complex power quality troubleshooting, or overall electrical performance studies on individual electrical equipment such as transformers and motors.However, taking three-phase measurements can be dangerous as you need to open electrical panels and put on proper personal protective equipment (PPE). The top risks can carry severe penalties, whether it's personal injury or...

Whether you troubleshoot and maintain electrical distribution, HVAC, or rotating equipment you probably use a digital multimeter regularly. You may also use an infrared camera, or thermal camera to help you troubleshoot.The problem: Carrying two separate tools or having to go back to the shop to grab the thermal camera. Adding even more tools to a heavy tool bag or taking time away from the work to be done.The solution: A thermal multimeter, or thermal dmm, is both a digital multimeter and a thermal...

By Brian HarrisonAccording to a Fluke 2019 survey, roughly 50 percent of maintenance and reliability professionals were actively planning Industrial Internet of Things (IIoT) initiatives.This survey preceded the challenges brought about by COVID-19. At the time, more than half of the teams interviewed found the IIoT process to be more complicated than anticipated because of an essential prerequisite—collaboration with other teams and departments. Despite the business disruption caused by the pandemic,...

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...

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...

Oscilloscopes (or scopes) test and display voltage signals as waveforms, visual representations of the variation of voltage over time. The signals are plotted on a graph, which shows how the signal changes. The vertical (Y) access represents the voltage measurement and the horizontal (X) axis represents time.SamplingSampling is the process of converting a portion of an input signal into a number of discrete electrical values for the purpose of storage, processing and display. The magnitude of each...

Keeping all the components of a facility running safely and efficiently is no easy task. And nobody knows that better than maintenance managers. Tracking the operational health of all those components is key to preventing unexpected failures and costly downtime. The trouble is, routine maintenance checks often miss recurring problems. If maintenance technicians aren’t taking readings at the right moment, an intermittent fault can go undetected until it escalates into a full-fledged failure.The...

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...

Automotive customers have zero tolerance for bad parts and therefore, electric motor maintenance needs utmost care. One of our customers, CNP Myszkow, coats small parts for the automotive industry. After dip spin painting, they heat-treat the parts in a tunnel furnace. This is divided into several areas, each with different temperatures. An electric motor drives a fan in each area to ensure stable temperatures since temperature stability relates strongly to final product quality. Any changes from...

Harmonics can cause high neutral currents in three-phase systems — even ones that are balanced. They heat up cables, which can cause fires. Many installers now check their work using a multimeter, but multimeters can’t measure harmonics.Equipment installation needs a power quality analyzerResistive (linear) loads like heating elements and incandescent lights used to dominate electrical supply networks. The last 10 years has, however, seen many more non-linear loads. Examples are LED lights, variable-speed...

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...

Grid connected photovoltaic systems are growing in importance as sustainable energy sources.The DC power of the solar panels is converted into an AC power by inverters. These are transformerless and, besides generating AC current, also inject a small DC Current. Excessive DC current injection into an AC network can cause problems like transformer saturation, however, which will cause additional losses and reduce transformer lifetime. For measuring these DC components, we need a Power Quality Analyzer...

Flickering lights can have an adverse effect on health, causing fatigue, lack of concentration, migraines and in some cases, epileptic shock. The severity of reaction and sensitivity varies from person to person. Some people can see a higher rate of flickering light than others. Fluorescent lamps can occasionally develop a fault that can cause them to have noticeable flicker.While health effects are a main concern, the production line of an industrial plant can also be affected. Workers can feel...

在您使用数字万用表的时候，采取必要的安全预防措施来处理工作环境中的情况。了解万用表CAT安全等级和进入防护代码(IP代码)

何为数字万用表的准确度？ 数字万用表如何提供一致的读数？ 什么是测量分辨率？ 何为万用表的量程？ 字数和位数有何区别？ 使用能提供正确测量值的万用表 非常重要。了解这些测量值的含义更为重要。准确度和精度确保测量结果有用；精度越高，越容易实现可重复性；准确度越高，读数就越接近完美。 何为数字万用表的准确度？ 准确度指在特定工作条件下的最大允许误差，表示为百分比，指显示的测量值与被测信号真值(标准值)的接近程度。准确度要求与公认的行业标准进行比较。...

A thermal imaging program is a powerful tool in both preventive maintenance and when troubleshooting critical equipment; both of which can save time and money. Adding thermal imaging inspections is a huge upgrade in your ability to detect and fix issues before unexpected downtime occurs.Thermal imaging in your businessWorking in maintenance, you already have broad experience with many types of equipment and failure scenarios. Your experience, combined with a thermal camera and some basic training,...

Robust desktop and mobile phone software is an important aspect of thermal inspection workflows. Thermography software can help enhance and clarify images, add analysis and share professional-looking reports in applications spanning mechanical, electrical, electronic equipment, building diagnostics and more.It’s important to note that analyzing thermographic imagery accurately requires special training to consider emissivity of objects and other factors like background temperature and relative...

Calibrating a HART temperature transmitter requires an accurate temperature simulator or temperature source, mA measurement, and a HART communication tool for calibration. You can use separate tools or a calibrator that integrates all three to perform this task. HART is an industry standard defining the communications protocol between smart field devices and a control system that uses 4-20 mA wiring. Before going to the field, gather the needed calibration and communication test tools. If testing...

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福禄克计量校准部日前推出两款数字化标准多用表：      8588A  标准数字多用表      8558A  八位半数字多用表。 8588A标准数字多用表： 专为一级标准实验室量身打造，拥有业界优异的1年期直流电压准确度 能够在短短1秒内产生稳定的八位半读数 8588A拥有超过12项测量功能，帮助您将实验室级别的系统测试成本统一整合到单台测量仪器中。  8558A八位半数字多用表 5MS/s的高采样率，高分辨率数字化多用表，适用于实验室、工厂测试系统自动化...