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Model 644 Transmitter-Sensor Matching

Reduce Temperature Measurement Error by up to 75% ! 

Best in Class Accuracy
Transmitter-Sensor Matching — Each sensor has a unique Resistance-Temperature (R-T) curve.  This curve is determined by a 4th order Callendar Van Dusen Equation. By determining the unique Calendar Van Dusens constants for a specific sensor, the exact R-T curve can be determined.
  

  
The Model 644 uses these CVD constants to create a unique R-T curve for the specific sensor; the transmitter then uses this curve for the highest accuracy available.  This is known as transmitter-sensor matching, which can increase your temperature point accuracy by up to 75%.
  

What are the Sources of Temperature Measurement Error?

Temperature measurement error is comprised of both transmitter and sensor related components. Transmitters exhibit inherent electronic errors as well as errors related to changing ambient temperature. The majority of error in a temperature measurement system is comprised of sensor error! 

Calculate the increased accuracy for your application (download spreadsheet @ 175 kb to your hard drive) 




More Information

Technical Documentation

AMS 1.4.1 Device Template Install Kits 


Emerson Process Management, Rosemount Division, 8200 Market Blvd. Chanhassen, MN USA 55317
North America: 1-800-999-9307    International: 952-906-8888  Fax:  952-949-7001

 
 

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Rosemount Division


Last Updated 03/24/08 


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