Plant integration of wireless steam traps

Case study notes show how multiple vendors’ technologies enable successful wireless monitoring of steam traps.

05/22/2012


Case study notes: Last December, a team of engineers and control system specialists worked with a client to field test the installation and operation of wireless steam trap monitors in an industrial environment.

Engineers involved in the wireless sensing and monitoring project had to address two major questions:

1) Given the amount of metal and line-of-sight obstructions, would wireless work?

2) Could the wireless devices be integrated into their existing control system?

Multi-vendor integration allows remote monitoring of steam traps. Courtesy: Maverick TechnologiesWe quickly installed 30 wireless steam trap monitors on multiple floors in our steam plant. These devices are battery-operated, so no field wiring was required, and the batteries typically last three to five years. Each trap was configured to report four instrument readings: acoustic impedance, trap temperature, battery voltage, and internal board temperature. The transmitters contain software to form a self-organizing network, which allows them to work like repeaters for each other when necessary. It also allows you to add or remove transmitters as your plant’s needs change.

Three Smart Wireless Gateways from Emerson were used to communicate with the wireless transmitters. The gateways are Web-enabled, allowing connection with a laptop or other equipment via Ethernet. It is easy to communicate with the gateways and view information from each of the traps. In addition to process information, the transmitters report which other transmitters they communicate with. This allows fine-tuning of device placement to determine if signal repeaters are needed.

A ProSoft Modbus card was configured to move the instrument readings from the gateways into the plant’s existing Allen-Bradley controllers from Rockwell Automation. Thus alarms, display, and trending of the steam trap information could be added to the existing human-machine interface system.

In the five months since the system has been in service, there have been no signal-loss problems nor any failures of the wireless transmitters or gateways. This test installation has been, and continues to be, a successful demonstration of the industrial wireless technology.

- Susan Lang is project manager, Maverick Technologies. Edited by Mark T. Hoske, content manager CFE Media, Control Engineering, Plant Engineering, and Consulting-Specifying Engineer. Reach him at mhoske@cfemedia.com.

http://controleng.com/wireless has more industrial wireless advice.

See the "Real World Engineering Blog" at http://controleng.com/blogs



No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
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.
Salary and career survey: Benchmarks and advice; Designing controls; Remote data collection, historians; Control valve advances; Hannover Messe; Control Engineering International
System integration: Best practices and technologies to help; Virtualization virtues; Cyber security advice; Motor system efficiency, savings; Product exclusives; Road to Hannover
Collaborative robotics: How to improve safety, return on investment; Industrial Internet of Things, Industrie 4.0: World views; High-performance HMI, Information Integration: OPC and OMG
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.
PLCs, robots, and the quest for a single controller; how OEE is key to automation solutions.

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

Getting to the bottom of subsea repairs: Older pipelines need more attention, and operators need a repair strategy; OTC preview; Offshore production difficult - and crucial
Digital oilfields: Integrated HMI/SCADA systems enable smarter data acquisition; Real-world impact of simulation; Electric actuator technology prospers in production fields
Special report: U.S. natural gas; LNG transport technologies evolve to meet market demand; Understanding new methane regulations; Predictive maintenance for gas pipeline compressors
click me