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the INTERFACE September 2010 Edition
Solutions for Power Plants: NEW Digital Line Card
Moore Industries has released, "Automation and Instrumentation Solutions for Power Plant Applications", a new digital interactive line card.
In a concise "bullet item" format, the line card provides instrumentation solutions and applications for today's mature power plants. Such power plants present unique challenges when performing maintenance, repairs, replacement and upgrades. Often, companies that provided in-place instruments are long gone. Monitoring and control requirements may have changed. More, and better, process instrumentation is needed to improve operations and decrease costs.
Topics include:
- Installing Distributed I/O to circumvent extensive new wire installation, monitor boiler tube, burner tip, and cooling pump temperatures, track tank levels, and data archiving,
- Replacing and installing new Signal Transmitters, Isolators and Converters to convert legacy signals to standard 4-20mA signals, and low-level RTD and thermocouple signals to current signals that can better withstand transmission through a noisy plant,
- Using Process Controllers, Monitors and Backup stations as hot PID backups for critical drum level measurements, and as remote manual stations or field controls, and more.
"Automation and Instrumentation Solutions for Power Plant Applications" can be downloaded as a PDF free through the Moore Industries corporate website HERE.
Q & A: Differential Temperature
Q: Do you have a module (or several in concert) that provide an alarm on differential temperature. Specifically we are going to be measuring inlet water temperature and water temperature leaving the seal face. The goal is to subtract T (leaving) from T (inlet) and alarm when the difference exceeds 10 to 20°C.
A: The model SPA2 Programmable Limit Alarm Trip can accept two RTD inputs and alarm on differential temperature.
If the two temperatures are represented by 4-20mA signals, then the DDA Current and Voltage Alarm with its differential input alarm option (DA) can be used for this application.
For more information about the SPA2, please download the data sheet HERE.
Installing Fieldbus White
PaperMooreHawke, the fieldbus division of Moore Industries, has released a new version of the Installing Fieldbus white paper.
Many automation engineers are coming face-to-face with real fieldbus applications for the first time. Fieldbus is a wonderful technology with many benefits, but fieldbus installations require some additional considerations over and above normal 4-20mA projects. In this in-depth white paper, we discuss some of those issues, and show you how to deal with them.
Download Installing Fieldbus HERE.