For those who work in or are suppliers to many of the process industries, the "heat" is always on plant equipment even during the cold of winter and the search to find ways to beat the heat when selecting plant instrumentation and controls that withstand rugged operating conditions continues. Air/gas flow meters are no exception. While performance, ease of installation, maintenance and other criteria are all important, flow meters must always be evaluated according to their operating environment and process conditions. These conditions often range from 500 to 850°F (260 to 454°C) in high temperature process industries. Download this white paper to learn more about selecting flowmeters for high temperature process industries.
This paper gives an overview of some basic criteria for choosing lining material for the water / wastewater industry and furthermore provides a short description of the properties, strengths and weaknesses of EPDM, NBR, PUR and Ebonite, i.e. the four types of lining material most commonly used in the water / wastewater industry.
Basic criteria for choosing lining material
Due to the functionality of the flowmeter, a non-conductive lining material is imperative, but other requirements vary according to the specific features of the intended application.
Understanding the accuracy of a given flowmeter is an important field but it can also be misleading as different specifications are used to explain how accurate a flowmeter measurement actually measures. This paper discusses the different specifications and interprets the impact of them.
Why deal with accuracy?
The reasons for dealing with flowmeter accuracy specifications are many-folded. One important reason is from an economical point of view. The more accurate a flowmeter can measure, the more money you will save as the medium is measured with only very little inaccurately.
E.g. If the medium is expensive such as oil, it is important to know exactly how much is consumed. This ensures it is being consumed as efficiently as possible. Another reason is in terms of dosing, where a given amount of a medium is added. This must be done with a high level of precision and the accuracy is thus important in order to dose correctly. This is critical in certain industries such as in pharma or chemical.
TVIS is a heat transmission company for the Trekantomradet geographical area of Denmark. It takes care of excess heat from the industries and power plants in the area and redistributes the heat in pipelines to households, public institutions, offices, shops and other facilities in the area. ABB in Denmark has supplied TVIS a SCADA solution based on System 800xA for controlling the district heating network. Read this white paper to learn how TVIS, in conjunction with ABB's new SCADA solution system, monitors heat transmissions remotely and safely.
ABB Review takes a look at the project in Petrobras REPAR refinery. This project is a stateoftheart electrical integration for a refinery, it uses System 800xA and IEC 61850. Download this white paper to learn how ABB accomplished this system integration.
Something happensa signal peaks or fallsand you need to know. A limit alarm trip triggers the response you need to maintain normal and safe operations. This white paper will show you how to back up your DCS and PLC "soft" alarms with the reliability of "hard" alarms.
Protection from noise and ground loops due to ISO-Channel architecture.
Precision measurement systems are often limited in that all inputs are connected to a single ground. Typically, multiplexer input configurations are set up this way, since all signal inputs are connected to the same return. Even differential input configurations use the same ground reference. The result is that accuracy and flexibility for accurate measurements can be severely compromised when noise or common mode voltage is present.
Crosstalk from one input signal can easily be reflected onto another input. The design movement to an A/D per channel can help this problem. But that is not sufficient in many cases.
To minimize noise and ground loops, some newer systems offer isolation between the input signal ground reference and the computer ground. This effectively separates the computer ground from the measurement portion of the system. But still, there is no isolation between input sensor channels, which is a common source of error and frustration for user applications. Why?
AMS2750D Temperature Uniformity Surveys using TEMPpoint.
Industrial process furnaces and ovens require uniform temperature and heating; This is critical to repeatable product performance from batch to batch. These furnaces require periodic inspection for temperature uniformity.
Electronic and Mechanical Calibration Services, Millbury Massachusetts characterizes temperature uniformity in industrial furnaces and ovens for their customers. This is accomplished by measuring temperature in several locations throughout the furnace and monitoring temperature with thermocouples over time according to AMS2750D specifications.
The customer previously used chart recorders which require constant monitoring while the survey is running. Surveys can run anywhere from 35 minutes to several hours long depending on the industry specified requirements. With the TEMPpoint solution the operator can set it up and let it run unattended, freeing them up to multitask their time and work more efficiently. The shipping TEMPpoint application required very little modification using Measure Foundry and now fulfills customer's requirements.
Everyone is familiar with the concept of temperature in an everyday sense because our bodies feel and are sensitive to any perceptible change. But for more exacting needs as found in many scientific, industrial, and commercial uses, the temperature of a process must be measured and controlled definitively. Even changes of a fraction of a degree Celsius can be wasteful or even catastrophic in many situations.
For example, some biotech processes require elevated temperatures for reactions to occur and added reagents require exactly the right temperature for proper catalytic action. New alloys of metal and composites, such as those on the new Boeing 787 Dreamliner, are formed with high temperature methods at exacting degree points to create the necessary properties of strength, endurance, and reliability. Certain medical supplies and pharmaceuticals must be stored at exactly the desired temperature for transport and inventory to protect against deterioration and ensure effectiveness.
These new applications have driven the hunt for more exacting temperature measurement and control solutions that are easy to implement and use by both novice users and experienced engineers alike. This is a challenging task. However, new equipment and standards, such as LXI (LAN Extensions for Instrumentation) offer a methodology to perform these exacting measurements in test and control applications.
Many LXI devices are available on the market today. But, what do you need to know to select the best temperature measurement solution for your test and control application? This paper describes the common pitfalls of precision temperature measurement and what you need to consider before selecting a temperature measurement solution.
Today we have clear guidelines on how the Safety Instrumented Systems (SIS) and basic Process Control Systems (BPCS) should be separated from a controls and network perspective. But what does this mean to the HMI and the control room design?
Where do Fire & Gas Systems fit into the big picture and what about new Security and Environmental monitoring tasks?
What does the Instrument Engineer needs to know about operators and how systems communicate with them.
The evolution of the control room continues as Large Screen Displays provide a big picture view of multiple systems. Do rules and guidelines exist for this aspect of independent protection layers? What are today's best practices for bringing these islands of technology together.
This paper will review the topic and provide advice on a subject on which the books remain silent. Today's practices are haphazard and left to individuals without a systematic design or guidance.
Over the past 20 years the Safety System and the Automation system have been evolving separately. They use similar technologies, but the operator interface needs to be just one system. Unfortunately, due to the nature of the designs, this is not the case.
The automation system has been evolving since the introduction of the DCS and many Human Factor mistakes have been made. As we move towards new standards such as ISA SP 101 a more formal approach to HMI design is being taken.
The past widespread use of black backgrounds which cause glare issues in the control room and are solely responsible for turning the control room lights down to very low levels, or in some cases off, are being replaced with grey backgrounds and a new grayscale graphic standard replacing bright colors for a more plain grayscale scheme only using color to attract the operators' attention.
In having strong compliance schemes that restrict color usage to just a handful of colors, restricting the use of some colors that are reserved for important information such as alarm status, it appears that the automation system is being standardized and is starting to take advantage of new technology available to control room designers such as large screen displays.
This white paper explains why application whitelisting is being rapidly adopted as a security and control solution for SCADA systems. In three major sections, the paper: 1) Provides a detailed perspective on how application whitelisting technology works. 2) Discusses the use and benefits of whitelisting technologies in SCADA and Energy environments. 3) Explains how the technology is adapting to function in environments where controlled software changes are needed.
Although multivariable control is now a wellestablished technology, new applications are still being found on which to apply it.In this paper, details will be presented on how Honeywells Profit Controller was found to be particularly applicable to the offshore production process.
Customers in all industries are coming more and more under pressure to measure the cost of their utilities. Important drivers for this pressure are the rising cost of energy and various certifications according to EMAS and the ISO 14000 series. Measuring utilities has been neglected in the past and using calibrated technology is necessary for this process. However, many companies only measure their utility consumption at the custody transfer point, and these few measuring occurrences leave room for inaccuracy and poor energy management. By investing money in efficient measuring tools, is possible to set up energy monitoring systems that measure the consumption of each respective utility close to the point of use. This white paper reviews processes that can help you attain better energy management. Download now to learn more.
Protecting your HMI/SCADA system is critical but can be challenging due to complex, multilayered technologies, cyber threats and other risks. This white paper describes where vulnerabilities within an HMI/SCADA system may lie and how companies can take proactive steps to address susceptible areas through securitybased software capabilities.
This paper discusses how portable data logging technology can be used to measure, record, and document the performance of geothermal heat pumps, and provides specific case study examples of how the technology is being applied in geothermal system monitoring applications.
In todays pharmaceutical and biotechnology manufacturing environments, compliance has taken on new meaning. It once implied a system of warnings that required attention. Today, the Food and Drug Administration (FDA) is demanding a new focus on compliance. Recent headlines reveal continuing industry problems and new efforts by the FDA to reduce them. And when you look beneath the regulation jargon, there are new opportunities to improve manufacturing efficiencies as well as compliance in ways that benefit the bottom line rather than cut into it. This paper explores the recent regulatory and industry changes that place new demands on manufacturers today. Then, it looks at newer technology solutions that exist to help navigate the current and future needs of life sciences manufacturing.
Infrared thermometers let you measure a target's surface temperature from a distance without physically touching it. This white paper shows you how to make those measurements in a repeatable and accurate way. If you have questions about emissivity, scatter, blackbodies and other infrared temperature measurement concepts then you'll want to read this guide.
» Download this white paper if you need to know how to calibrate infrared thermometers.
It's now time to upgrade to a new HART Communicator. Your old hand held HART Communicator is obsolete and receives limited support. You shop around and find that it costs between $3000 and $7000 for a new hand held HART Communicator. A Google search reveals a PC based alternative. Will the PC alternative perform as required? What should you look for?
The PC based HART Communicator has been around for many years, but until recently it has not been able to replace the hand held HART communicator. The main reason is that it could not communicate at the DD level with all the devices in the DD library. Recent developments have eliminated that problem and now is a good time to review the capabilities of a PC based HART Communicator.