Control Engineering's Process Instrumentation Enews -- March 2002

05/30/2002


In this issue:


Monitoring reciprocating machinery revisited

I remember it clearly-the reciprocating compressor experiment my colleagues and I did as part of an experiment in thermodynamics, ME 264 it was called then, at the old Mechanical Engineering Lab at the University of Illinois in Urbana. The four of us struggled with a mechanical indicator that actually traced PV diagrams when the compressor was cycled. The purpose of the experiment was to validate some then obscure (to us) thermodynamic compressor performance theory.

Thermodynamic theory has not changed. Cylinder pressure and position represent two very important measurements for reciprocating compressors. To that end, Bently Nevada Corp. , Minden, Nev., offers the 3500/77M Cylinder Pressure Monitor and the 3500/72M Rod Position Monitor. Examining the cylinder pressure profile is considered the best method of determining the overall health of a recip gas compressor. The pressure monitor uses permanently installed transducers located on each cylinder chamber. They collect pressure data along with crankshaft position to obtain continuous and performance data that provide information on the condition of the valves, piston rings, packing glands, and the crosshead pin. According to the company, recip-specific plot types such as dynamic PV curves can now be introduced in its System 1 software, allowing Bently Nevada to address complete condition monitoring needs for reciprocating machinery.

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If you don't touch it, you wouldn't wear it out

Well, not exactly, other things can go wrong. However, noncontact sensors have the advantage of reduced wear and tear and, hence, increased reliability because they remain out of harm's way. According to the article 'Contact Sensors Losing the Battle against Noncontact Sensors' by Daniela Carrillo, research analyst for the Frost & Sullivan Sensors Group, noncontact technologies are making headway against traditional contact sensors is some industry sectors. Areas where noncontact sensors are said to be making inroads in process sensing applications include temperature sensing (thermocouple vs. infrared) and emissions monitoring and gas detection (catalytic vs. infrared).

For additional information on this subject, visit Frost & Sullivan .

For a February 2002 Control Engineering article on contact temperature sensing, click /archives/2002/ctl0202.01/020201.htm

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An outpouring of data for the control engineer

Wakefield, Mass. - WorldFlow Monitoring Service website includes four components: The Flow Barometer-a quarterly report on the flow industry, The Process Industry Monitor -- a quarterly report on the process industries, User Perspective-a quarterly report on flowmeter users surveys, and an extensive database of flowmeter products arranged by technology.

For more information, visit WorldFlow Monitoring Service .

For recent Control Engineering flowmeter coverage, search our site, or visit /archives/2001/ctl1101.01/011101.htm and also see /archives/2001/ctl0801.01/0108pf.htm

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A step in the right direction

Rosslyn, Va. - Improperly disposed of mercury is extremely hazardous to the environment. With that in mind, Honeywell, General Electric, and White Rodgers established Thermostat Recycling Corp. (TRC) promote the collection of used mercury-switch thermostats for eventual removal and disposal of the mercury. Since January 1998 when it began operations, TRC has collected over 1,060 lb of mercury from nearly 123,000 used thermostats. TRC maintains operations in 22 states and the District of Columbia. According to Ric Erdheim, TRC's executive director, there are no plans to expand the collection of the liquid mercury from other sensors or control components. The effort is run through participating controls wholesalers viewable on the web at www.nema.org/trc .

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Archive

According to the results of a survey published in the March 1957 edition of Control Engineering , the top five non-electrical parameters measured by control engineers were shaft position, temperature, pressure, velocity, and flow. The survey further stated that the preferred mode of signal conversion for the top five, as well as the other nine (for a total of 14) variables mentioned, was voltage conversion. 'Granted the universality of the shaft position parameter (so important in servo and analog systems), it is still interesting to see how the old `war horses' of temperature, pressure, and flow dominate the measurements-a sure sign that so-called process variables prevail, no matter what the field or application.' It is interesting to note that 'level' came in eleventh.

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The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by Control Engineering subscribers. Vote now (if qualified)!
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
Each year, a panel of Control Engineering and Plant Engineering editors and industry expert judges select the System Integrator of the Year Award winners in three categories.
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Maximize ROI with integrated control system approach; Microcontrollers vs. PLCs; Power quality; Accelerate and rewire IIoT; Traits for excellent engineers
HMI effectiveness; Distributed I/O; Engineers' Choice Award finalists; System Integrator advice; Inside Machines
Women in engineering; Engineering Leaders Under 40; PID benefits and drawbacks; Ladder logic; Cloud computing
Programmable logic controllers (PLCs) represent the logic (decision) part of the control loop of sense, decide, and actuate. As we know, PLCs aren’t the only option for making decisions in a control loop, but they are likely why you’re here.
This digital report explains how plant engineers and subject matter experts (SME) need support for time series data and its many challenges.
This article collection contains several articles on how advancements in vision system designs, computing power, algorithms, optics, and communications are making machine vision more cost effective than ever before.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Control room technology innovation; Practical approaches to corrosion protection; Pipeline regulator revises quality programs
Cloud, mobility, and remote operations; SCADA and contextual mobility; Custom UPS empowering a secure pipeline
Infrastructure for natural gas expansion; Artificial lift methods; Disruptive technology and fugitive gas emissions
Automation Engineer; Wood Group
System Integrator; Cross Integrated Systems Group
Jose S. Vasquez, Jr.
Fire & Life Safety Engineer; Technip USA Inc.
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by Control Engineering subscribers. Vote now (if qualified)!
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
Each year, a panel of Control Engineering and Plant Engineering editors and industry expert judges select the System Integrator of the Year Award winners in three categories.
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Maximize ROI with integrated control system approach; Microcontrollers vs. PLCs; Power quality; Accelerate and rewire IIoT; Traits for excellent engineers
HMI effectiveness; Distributed I/O; Engineers' Choice Award finalists; System Integrator advice; Inside Machines
Women in engineering; Engineering Leaders Under 40; PID benefits and drawbacks; Ladder logic; Cloud computing
Programmable logic controllers (PLCs) represent the logic (decision) part of the control loop of sense, decide, and actuate. As we know, PLCs aren’t the only option for making decisions in a control loop, but they are likely why you’re here.
This digital report explains how plant engineers and subject matter experts (SME) need support for time series data and its many challenges.
This article collection contains several articles on how advancements in vision system designs, computing power, algorithms, optics, and communications are making machine vision more cost effective than ever before.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Control room technology innovation; Practical approaches to corrosion protection; Pipeline regulator revises quality programs
Cloud, mobility, and remote operations; SCADA and contextual mobility; Custom UPS empowering a secure pipeline
Infrastructure for natural gas expansion; Artificial lift methods; Disruptive technology and fugitive gas emissions
Automation Engineer; Wood Group
System Integrator; Cross Integrated Systems Group
Jose S. Vasquez, Jr.
Fire & Life Safety Engineer; Technip USA Inc.
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by Control Engineering subscribers. Vote now (if qualified)!
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
Each year, a panel of Control Engineering and Plant Engineering editors and industry expert judges select the System Integrator of the Year Award winners in three categories.
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Maximize ROI with integrated control system approach; Microcontrollers vs. PLCs; Power quality; Accelerate and rewire IIoT; Traits for excellent engineers
HMI effectiveness; Distributed I/O; Engineers' Choice Award finalists; System Integrator advice; Inside Machines
Women in engineering; Engineering Leaders Under 40; PID benefits and drawbacks; Ladder logic; Cloud computing
Programmable logic controllers (PLCs) represent the logic (decision) part of the control loop of sense, decide, and actuate. As we know, PLCs aren’t the only option for making decisions in a control loop, but they are likely why you’re here.
This digital report explains how plant engineers and subject matter experts (SME) need support for time series data and its many challenges.
This article collection contains several articles on how advancements in vision system designs, computing power, algorithms, optics, and communications are making machine vision more cost effective than ever before.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Control room technology innovation; Practical approaches to corrosion protection; Pipeline regulator revises quality programs
Cloud, mobility, and remote operations; SCADA and contextual mobility; Custom UPS empowering a secure pipeline
Infrastructure for natural gas expansion; Artificial lift methods; Disruptive technology and fugitive gas emissions
Automation Engineer; Wood Group
System Integrator; Cross Integrated Systems Group
Jose S. Vasquez, Jr.
Fire & Life Safety Engineer; Technip USA Inc.
This course focuses on climate analysis, appropriateness of cooling system selection, and combining cooling systems.
This course will help identify and reveal electrical hazards and identify the solutions to implementing and maintaining a safe work environment.
This course explains how maintaining power and communication systems through emergency power-generation systems is critical.
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