How does a tech know the a/c compressor he or she is diagnosing is actually failed and that the problem is not a crankcase heater, condenser fan, or rubbed out wire?

When servicing a refrigeration system, it is important to accurately determine the true cause of the failure. Misdiagnosing the problem can often create additional system issues for you and the customer.

Now available with Bluetooth, this product provides users full access to all features of their devices, such as apps and email.

Technicians have the choice of using either a digital or mechanical manifold gauge. Each one has its benefits and disadvantages, which is why it may pay to own one of each kind.

Honeywell announced the launch of Honeywell Forge Energy Optimization, a cloud-based, closed-loop, machine learning solution.

Our new website has been launched today. Tell your visitors why you have started a new presentation and how it benefits them. Mention your goals and project advantages. Try to briefly give your visitors reasons why they should return to your pages.

Annual HFC inventory reports are required to be audited by a CPA to ensure compliance, and regulated entities should understand what to anticipate for the 2024 compliance period. 

Today’s commercial structures are full of sophisticated controls that have been changing building automation systems exponentially.

Controls-Con, presented by Cochrane Supply on May 5-7, 2021, discussed the impact of smart controls on the building industry.

HVAC has a critical role to play in the future of building automation and digitalization.

Small- to medium-sized buildings make up about 94% of all commercial buildings in the U.S., according to the U.S. Energy Information Administration, yet only 13% of those buildings have a building automation system.

Here are some of the top benefits of commercial HVAC automation and how new technology may soon make automated systems even more valuable.

The market for automated systems in commercial buildings is growing rapidly, driven by increasing energy-efficiency goals, improving technology, and updated standards set by governments and professional associations.

Trends at this year’s AHR Expo within commercial controls and building automation were improving energy efficiency, making buildings more adaptable, streamlining workflow to make things easier for HVACR contractors, and a greater emphasis on cybersecurity and digitization.

Studies have shown potential, and real, energy savings with the use of fault detection and data analysis to guide HVAC systems.

Building automation systems can boost heating and cooling efficiency by more than 20%.

Home automation is no longer a thing of the past. Customers are seeking ways to intelligently control their homes in more ways than ever before, as evidenced by the number of new smart home products on display in this sector at the AHR Expo.

Quilt, a newly launched company, has introduced a ductless heat pump that they say simplifies the installation and rebate process, while offering transparent pricing.

Posted by Ariel Otilibili on Sep 15

In this Episode we discuss fault tolerance based on the new book by Bob Hanmer. This is the actually the first part of the discussion, the remainder will be published in the next episode of SE Radio. We start by discussing some of the context for fault tolerant systems and the imperfect world assumption. We then discuss a number of terms we will need when discussing the fault tolerance patterns. We then discuss the fault tolerance mindset and connect fault tolerance to a number of related subject areas, such as software quality. We then discuss the shared context for the patterns that follow, among them the important observation that fault tolerance does not come for free! Finally we provide an overview over the different sections covered in the book and start the detailed discussion of the patterns by looking at the Architectural Patterns section. The next episode will discuss the remaining patterns in the book.

This is the second part of the discussion on fault tolerance with Bob Hanmer (if you didn't listen to Episode 77, which contains part one, please go back and listen now; this episode builds on that previous one!) We start by discussing a set of error detection patterns. Among are the well-known approaches such as checksums and voting. We then look at error recovery patterns, including restart, rollback or roll forward. The next section looks at error mitigation patterns, which include shedding load and doing fresh work before stale. The last patterns section then looks at fault treatment patterns. We conclude the episode with a small discussion about how to design systems using (these and other) patterns, and with some thoughts on why actually wrote the book.

This is another episode recorded at OOP 2009, thanks to SIGS Datacom and programme chair Frances Paulisch for making this possible. Here is the abstract from the conference program: Many software systems have fragile architectures that are based on brittle assumptions or rigid architectures that reduce options and make change difficult. On the one hand, an architecture needs to be fit for the present day, suitable for immediate use, and on the other it needs to accommodate the future, absorbing reasonable uncertainty. However, an approach that is overly focused on today's needs and nothing more can create an inflexible architecture. An approach that becomes obsessed with possible future changes creates an overly complex architecture that is unfit for both today's and tomorrow's needs. Both approaches encourage an early descent into legacy for a system. The considerations presented in this talk reflect an approach that is more about thinking in the continuous present tense than just the present or the future tense. This includes principles from lean thinking, practices common in agile processes and techniques for loosely coupled design.

Johannes Thönes talks to Axel Rauschmayer about JavaScript and ECMAScript 6. They talk about the origin and version history. Then they dive into key JavaScript concepts and explain the features coming into the language with ECMAScript 6.

Michael Hausenblas talks with host Kim Carter about topics covered in Michael’s ebook Container Networking, such as single vs. multi-host container networking, orchestration, Kubernetes, service discovery, and many more. Michael and Kim also discuss the roles that IPTables plays, how the allocation of IP addresses is handled, along with the assignment of ports. Overlay networks are covered along with topics such as the open Container Network Interface (CNI).

Arnon Axelrod speaks with SE Radio’s Simon Crossley about test automation, a large complex subject that most listeners will have at least some familiarity with. Axelrod has worked in software engineering and test automation in several high-tech companie...

Justin Richer, lead author of the OAuth2 In Action book discusses the key technical features of the OAuth2 authorization protocol and the current best practices for selecting the right parts of it for your use case.

Felienne interviews Claire Le Goues about automatic program repair. Can programs repair themselves and what techniques are involved in that?

Sean Knapp of Ascend.io talks to Robert Blume about data pipeline automation with an orchestration layer.

Paul Smith discusses the Crystal Programming Language and the Lucky web framework with Jeremy Jung.

JP Aumasson, author of Serious Cryptography, discusses cryptography, specifically how encryption and hashing work and underpin many security functions.

Evan Weaver of Fauna discusses the Fauna distributed database. Host Felienne spoke with him about its design and properties, as well as the FQL query language, and the different models it supports: document-based as well as relational.

Paul Butcher of AdaCore discusses Fuzz Testing, an automated testing technique used to find security vulnerabilities and other software flaws. Host Philip Winston spoke with Butcher about negative testing, brute-force fuzz testing...

Alexander Pugh discusses why and when to use Robotic Process Automation (RPA). Host Jeremy Jung spoke with Pugh about interacting with systems without APIs like mainframes; the importance of having developers involved when building bots; the difficulty...

Audrey Lawrence of Amazon discusses Timeseries Databases and their new database offering Amazon Timestream. Philip Winston spoke with Lawrence about data modeling, ingestion, queries, performance, life-cycle management, hot data vs. cold data...

Sam Scott, CTO of Oso discusses how to build a global authorization service and challenges with host Priyanka.

Vaughn Vernon, author of the book “Strategic Monoliths and Microservices” discusses his book with host Akshay Manchale about strategies for purposeful architecture from the perspective of both business decision makers and technical leaders.

Phillip Mayhew of GameDriver discusses test automation for games and game-like applications. Host Philip Winston spoke with Mayhew about the increasing role of test automation in modern game development, the impact on the QA role, how to run tests...

Vidal Graupera, an Engineering Manager at LinkedIn, speaks with SE Radio’s Brijesh Ammanath about the importance of managers' one-on-one meetings with direct reports. They start by considering how a 1:1 meeting differs from other meetings...

Paul Hammant, independent consultant, joins host Giovanni Asproni to speak about trunk-based development—a version control management practice in which developers merge small, frequent updates to a core “trunk” or main branch. The episode explores the technique in some detail, including its pros and cons and some examples from real projects, and offers suggestions on how to get started. The conversation touches on a set of related topics, including code reviews, feature flags, continuous integration, and testing.

Jonathan Schneider, the cofounder of Moderne and the creator of OpenRewrite, talks with SE Radio's Gregory Kapfhammer about automated software maintenance. In addition to exploring the design and implementation of OpenRewrite, Schneider explains how the tool can automatically support software maintenance tasks such as framework migration and security fixes for programs implemented in languages like Java. The episode also explores how OpenRewrite uses the lossless semantic tree to support automated refactoring though the use of recipes. Brought to you by IEEE Computer Society and IEEE Software magazine.

Itamar Friedman, the CEO and co-founder of CodiumAI, speaks with host Gregory M. Kapfhammer about how to use generative AI techniques to support automated software testing. Their discussion centers around the design and use of Cover-Agent, an open-source implementation of the automated test augmentation tool described in the Foundations of Software Engineering (FSE) paper entitled “Automated Unit Test Improvement using Large Language Models at Meta“ by Alshahwan et al. The episode explores how large-language models (LLMs) can aid testers by automatically generating test cases that increase the code coverage of an existing testing suite. They also investigate other automated testing topics, including how Cover-Agent compares to different LLM-based tools and the strengths and weaknesses of using LLM-based approaches in software testing.

A decade after Typhoon Haiyan decimated the Philippines, the city of Tacloban is setting a new standard for surviving global catastrophes.

Sage Regenerative Kitchen’s executive chef explains why she added meat to the menu—and why she believes so deeply in regenerative farming.

A journalist takes us inside UAW’s “Stand Up” strike strategy, an innovative spin-off of 1930’s era “sit down” strikes.

In bringing electric vehicle battery plants under its national contract, the UAW took a major step toward transitioning away from fossil fuels in a way that protects workers' rights.

Families have had to leave their homes and emergency services are helping people as they deal with the impact of the worst flooding in the country for many years.

Politicians in Australia's parliament will vote on the law next week and, if passed, it aims to stop children being allowed social media accounts. But for some kids there will be ways around it.

Nowadays, it seems that everything we do tends to be somehow automated. The very same is happening in electrical distribution systems. The distribution system at the medium voltage (MV) or low voltage (LV) levels is designed using different structures such... Read more

The post The essentials of automation applied to distribution systems via PLCs, SCADA, IEDs, and RTUs appeared first on EEP - Electrical Engineering Portal.