What is the percent span for the old and new set points

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SUMMARY

The discussion centers on calculating the percent span for a reactor pressure transmitter after a set point adjustment from 160 psig to 190 psig. The recalibration of the transmitter from a range of 0-200 psig to 0-300 psig results in a calculated percent span of 63%. The span is defined as the operational range relative to the calibration range, which is crucial for understanding pressure measurement in reactor systems.

PREREQUISITES
  • Understanding of pressure measurement terminology, specifically "psig" (pounds per square inch gauge).
  • Knowledge of calibration processes for pressure transmitters.
  • Familiarity with the concept of operational range versus calibration range.
  • Basic mathematical skills for calculating percent span.
NEXT STEPS
  • Research the principles of pressure transmitter calibration techniques.
  • Learn how to calculate percent span in various pressure measurement scenarios.
  • Explore the impact of set point adjustments on production rates in chemical reactors.
  • Investigate best practices for maintaining accuracy in pressure measurement systems.
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Process engineers, instrumentation technicians, and anyone involved in the calibration and operation of pressure measurement systems in industrial settings.

jim1174
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In order to increase production rate a reactor set point was increased from 160 psig to 190 psig. The reactor pressure transmitter was recalibrated from 0-200psig to 0-300 psig what is the percent span for old and new set points. Can you please explain to me how to find the answer. The book says the answer is 63 percent.
 
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jim1174 said:
In order to increase production rate a reactor set point was increased from 160 psig to 190 psig. The reactor pressure transmitter was recalibrated from 0-200psig to 0-300 psig what is the percent span for old and new set points. Can you please explain to me how to find the answer. The book says the answer is 63 percent.
How does one define the span?

If compares the operational range from 0 to set point, with the calibration range, how does that relate to span?
 

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