Emerson Exchange 365

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MASS FLOW METER TEMPERATURE SENSOR

Hi all,

We are using R-Series mass flow meters in our circuits.

Let me know the effect of inbuilt temperature sensor failure on mass flow meter performance.

chandu

• 18 Dec 2014 12:59 PM
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6 Replies

• vikasamin

  

  • 19 Dec 2014 4:33 AM

  When temp. sensor fails it will affect the calcualtion of Volumatric flowarte. Please tell which is the model.... What O/P you are taking Standered flow OR normal flow.....????

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• Wayne Brinkman

  

  • 30 Dec 2014 3:40 PM

  A failed temperature sensor (if the RTD circuit is shorted or if it opens) is a critical fault and the sensor will not provide any measurements. If the temperature measurement is just off by a few degrees it will only affect the flow and density readings slightly. The temperaure measurement is used to compensate for the change in tube stiffness with temperature and adjusts the flow and denisity readings only a few percent per 100 degrees C.

  Wayne R. Brinkman- Sr. Sales Representative

  Emerson Flow

  Mobile 314-223-0112

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• chandu

  

  • 5 Jan 2015 12:29 PM

  In reply to Wayne Brinkman:

  Sir,Thank you for your valuable reply ...... Assume that my inbuilt temperature sensor is behaving erratically and let me know its effect on mass flow measurement......

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• Wayne Brinkman

  

  • 5 Jan 2015 1:38 PM

  In reply to chandu:

  The last 4 characters of the flow cal factor, including the decimal point, is the flow rate correction in percent per 100 dec C change from 20 deg c.
  
  You can estimate the error associated with an incorrect temperature by first determining the maximum deviation from actual process temperature in Deg C. Divide that by 100 then multiply the correction percentage determined above to determine the error.

  Wayne R. Brinkman- Sr. Sales Representative

  Emerson Flow

  Mobile 314-223-0112

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• chandu

  

  • 6 Jan 2015 11:45 AM

  In reply to Wayne Brinkman:

  Sir,If possible can you explain me with an example

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• chandu

  

  • 6 Jan 2015 11:47 AM

  In reply to vikasamin:

  We are using CMF series and our application calls for mass flow measurement

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