Pressure

Control’s Monthly Resource Guide. This Month, Covering Pressure

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This article was printed in CONTROL's March 2009 edition.

Every month, Control’s editors take a specific product area, collect all the latest, significant tools we can find, and present them here to make your job easier. If you know of any tools and resources we didn’t include, send them to wboyes@putman.net, and we’ll add them to the website.

APPLICATION GUIDE
Emerson Process Management
800/558-5883
Edition VI, 736-page pressure regulator application guide is a technical reference for applications and pressure data on Fisher-brand industrial pressure regulators. It is designed to provide assistance in selecting the right pressure regulator for a range of applications anywhere in the world. The guide provides information on the principles of various products in applications, such as liquids, sanitary and tank blanketing, process gases, fuel gases.

DIAPHRAGM SEALS
TURCK
763/553-7300 
“Reasons for Choosing a Diaphragm Seal for Pressure Applications” is a white paper that describes why a diaphragm seal is used to isolate the media being sensed and the sensing element in pressure measurement applications. Diaphragm seals protect the sensing element from damage caused by corrosive fluids and debris or when a process connection is changed from threaded to sanitary.

HAZARDOUS AREA SENSING
PCB Piezotronics
888/684-0011
Website describes hazardous area approved industrial Dynamic ICP pressure sensors. Piezoelectric pressure sensors offer the ability to respond to very rapid pressure spikes, pulsations and surges. 

PRESSURE TRANSDUCER PRIMER
Transtronics
785/841-3089   
An engineering wiki entry explains the basics of pressure transducers, including standard pressure units and conventions, transducer elecrical output, current vs. pressure, suspension and mounting of transducers and more.

PRESSURE MEASUREMENT GUIDE
ISA 
919/549-8411  
Industrial Pressure, Level and Density Measurement, 2nd Ed. by Donald R. Gillum discusses techniques and devices for level, pressure and density measurement for various process conditions and measurement demands. The guide is for technicians and engineers who design, install, calibrate, troubleshoot and maintain instruments. Installation requirements, selection criteria, calibration procedures and accuracy are addressed.

INSTALLATION TIPS
Omega Engineering 
888/TC-OMEGA  
Technical Guide answers common problems or questions concerning the use of pressure transducers. It discusses transducer output and their wiring configurations; handling, locating and installing transducers; and determining how many transducers can be excited from one power supply.

SPECIFYING PRESSURE TRANSMITTERS
SensorsONE
+44 (0) 1780 721569    
White paper titled “Supply Voltage and Load Resistance Considerations for Pressure Transmitters” discusses how it is necessary for any pressure transmitter to function within its designed performance levels. It must maintain a minimum voltage across the two electrical connections to the device. White paper further discusses load resistor effects on pressure transmitter supply voltages.

KNOWING YOUR PLACE
Yaskawa Electric America
1-800-927-5292   
“Proper Placement of Pressure Transmitters” from Sept. 2008 HPAC Engineering. Yaskawa’s building automation team discusses the proper placement of pressure-feedback transmitters—the most important factor in realizing projected energy savings—in HVAC systems. Link to story at http://hpac.com/mag/proper_placement_pressure/.

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