2009

61-71 of 71 < first | | next | last >
  • Electronic Device Damage in Control Panel of Drilling Unit

    Reliability of electronic circuit boards and electronic devices of console of drilling units are investigated. This new analytical method confirms modification of electronic device dynamic behaviour which installed in console of drilling unit. It is in agreement with experimental results which show electronic circuit board failure in driller console when dynamic loading is considerably less than values required to affect the board when board itself , lonely, is under vibration test.

    Majority of failures of electronic equipment, instruments, sensors and sensitive devices are mechanical in nature. Typical failures caused by break, crack and creep. It is often quite difficult to determine main cause of malfunction and failure. Dynamic and vibration loads caused very large percent of sensitive equipment failures which installed in dynamic environment. Vibration failures are often difficult to trace. Usually resonance situations and coupling effects are involved. Sometimes it does not appear to be any connection between failed parts and vibration loadings.

    The dynamic behaviour of electronic and electric device is a subject that has received considerable attention due to its technical importance. Analysis of electric / electronic devices or circuit boards under dynamic loading was presented previously. But only a limited number of contributions have been published on counteraction effects of complex systems (in this case drilling unit) and these devices. New analytical formulations to study modified dynamic behaviour of sensitive devices in a complex system (drilling unit) is presented. When a circuit board or electronic device is installed in a driller console, there will be complicated interactions between its dynamic characteristics and drilling unit dynamic behaviour. There are different dynamic responses and consequently much more possibilities of resonance. Electronic devices and electronic circuit boards are vulnerable against dynamic loading. For example for a drilling unit revamp project, vibration tests were conducted on electronic circuit board in a broad frequency range and with high vibration amplitudes. Tests were repeated however no damage was observed. During drilling unit site performance test, failure of electronic circuit board was occurred because of mechanical damage. The dynamic loading amplitude was considerably less than amplitude in vibration tests. Extensive investigation shows that failure was only due to modified dynamic behaviour of system.

    Amin Almasi, Tecnicas Reunidas S.A.
    09/23/2009
  • Wireless Monitoring of Valves

    The Need for Wireless Monitoring – An Overview
    There is a real on-going need for monitoring of valve positions (actuated or manual) in the process line. Malfunctioning of a valve can result in danger to human health and safety, affect yields, and generate environmental risks. In some industries, regulation requires constant recording of valve position. Currently, such monitoring is done through wired “Switch Boxes”. Each such device requires data transmission and power cabling. Not only are these cables costly to manufacture and install, they are also one of the most frequent sources of failures in the process line, due to the fact that they are very often exposed to harsh environmental conditions. In fact, it is right here, at the field device level, where the majority of problems with wires really exist.

    Israel Radomsky , CEO and Founder, Eltav Wireless Monitoring Ltd. Israel
    10/09/2009
  • Why Do Steam Traps Fail?

    Properly functioning steam traps open to release condensate and automatically close when steam is present. Failed traps waste fuel, reduce efficiency, increase production costs and compromise the overall integrity of the steam and condensate systems. Traps should be tested on a regular basis -- or the neglect may be quite costly.

    Bruce Gorelick, Enercheck Systems and Alan Bandes, UE Systems, Inc.
    10/09/2009
  • TIA-1005 Industrial Ethernet Cabling Standard

    The Effect on the 10/100 Industrial Ethernet Switch Performance.

    The Anixter Infrastructure Solutions Lab wanted to determine what effect the new TIA-1005 industrial cabling infrastructure standard would have on the data throughput performance of real Ethernet data packets running between SmartBits test cards and various manufacturers' 10/100 Ethernet switches in a real-world simulation. The test included five (5) different IP20-rated switches and three (3) different enterprise rack-mounted switches using various cabling channels made from both Category 5e and Category 6 cabling components and connector pairs that are allowable under the standard. The premise also asserts that the effect of the cabling channel interference will also vary from port to port and switch to switch because of the variable transmitter and receiver functionality.

    Anixter
    10/28/2009
  • Optimizing Solar Thermal Performance with Data Loggers

    This white paper discusses how solar thermal systems, with the help of portable data loggers, can be optimized to deliver the financial benefits residential and commercial users hope to achieve through their investments.

    Onset
    11/02/2009
  • Planning and Developing Effective Emergency Mass Notification Strategies for Hazardous Industrial Applications in the Post 9/11 Era.

    Emergency mass notification for hazardous industrial processing operations has traditionally focused on audible and visual signaling devices such as sirens, horns, warning lights, beacons, public address and intercom systems. And the extent of the ability to quickly alert anyone outside the plant—including fire, police and medical first responders—was until relatively recently limited to auto-dialing telecommunications. On September 11, 2001, however, everything changed.

    The horrific terrorist attacks on the World Trade Center in New York City dramatically accelerated the evolution of mass notification strategies and technologies. This has been particularly evident in the case of hazardous industrial applications, and resulted in plant safety being suddenly and inextricably interwoven with critical security and detection functions. The threat of terrorist attacks has most definitely prompted industrial plant managers to completely re-evaluate their approach to emergency mass notification—both internally and externally. And for obvious reasons, this comprehensive re-examination of mass notification requirements has had a substantial impact on facilities that process, use, store and distribute hazardous chemical materials.

    Compliance with directives from government agencies is clearly one of the driving forces propelling this comprehensive re-assessment of emergency mass notification planning, systems and resources. Also at play is the subsequent proliferation of new software-driven technology riding on existing network topologies; and the deployment of seamless, multi-device, interoperable communications both within and outside the facility. Finally, there is the growing trend towards integrated systems, which in this instance encompasses the integration of disparate mass-notification devices and communication systems to achieve the highest possible levels of reliability and monitoring through redundancy and operational simplicity.

    Federal Signal
    11/23/2009
  • Advantages of a PC Based HART Communicator

    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.

    ProComSol
    12/01/2009
  • Monitoring Geothermal Heat Pump Performance

    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.

    ONSET
    12/10/2009
  • Monitoring and Controlling Energy Efficiency in Utilities/W.A.G.E.S. for Cost Reduction

    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.

    Endress+Hauser
    12/14/2009
61-71 of 71 < first | | next | last >