Device integrates gas flow control functions with mass flowmeter

Simplifies basic flow control installations and helps network multiple instruments.

06/03/2009


The Compod from Sierra Instruments serves as a programmable control module working with mass flow meters to create gas flow control systems.

The company says that with its advanced capabilities, coupling the Compod with Smart-Trak mass flowmeters and controllers greatly simplifies basic flow control installations and permits networking of multiple instruments using open-source Modbus RTU protocol. With two digital outputs and one analog input, the Compod can be configured by the end user for a wide variety of process controls including:

  • Gas mixing and blending;

  • Gas ratio control;

  • Simple batch processes;

  • Triggering alarms;

  • Starting or stopping gas flows automatically under user-defined conditions; and

  • Gas flow totalization.

Compod also monitors the functionality of the mass flowmeter or controller and includes diagnostics, notifying users of faults or system updates.

The Compod mounts to any Sierra Smart-Trak 100 Series unit, converting the instrument’s internal RS-232 communications into multi-drop RS-485/Modbus RTU. With Modbus, multiple instruments can be daisy-chained over a single network. When used with a PLC or master computer, each instrument equipped with Compod becomes a node capable of sending and receiving data and commands.

Users can use Sierra’s provided software or write proprietary software using open-source Modbus protocol to configure standard functions for the Smart-Trak 100 Series. Compod’s two digital input/output channels and the analog input channel and a configurable pulse output channel can automate gas processes without the need for an external PLC or computer.

—Edited by Peter Welander, process industries editor, PWelander@cfemedia.com
Process & Advanced Control Monthly eNewsletter
Register here to select your choice of free eNewsletters.





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.
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.
Additive manufacturing benefits; HMI and sensor tips; System integrator advice; Innovations from the industry
Robotic safety, collaboration, standards; DCS migration tips; IT/OT convergence; 2017 Control Engineering Salary and Career Survey
Integrated mobility; Artificial intelligence; Predictive motion control; Sensors and control system inputs; Asset Management; Cybersecurity
Featured articles highlight technologies that enable the Industrial Internet of Things, IIoT-related products and strategies to get data more easily to the user.
This article collection contains several articles on how automation and controls are helping human-machine interface (HMI) hardware and software advance.
This digital report will explore several aspects of how IIoT will transform manufacturing in the coming years.

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

Infrastructure for natural gas expansion; Artificial lift methods; Disruptive technology and fugitive gas emissions
Mobility as the means to offshore innovation; Preventing another Deepwater Horizon; ROVs as subsea robots; SCADA and the radio spectrum
Future of oil and gas projects; Reservoir models; The importance of SCADA to oil and gas
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.
click me