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Flow application - Annubar Flowmeter 3051CFA - Guidance for Configuration and Field Calibration

Team,

Many thanks in advance for your valuable feedback. We have many flowmeters already installed in Anti-surge Loop for Centrifugal Compressor (installed at suction side).

Before ordering these flowmeter, Process conditions (Flow rates, pressure and temperature had been delivered to manufacturer). Besides that, Fluid data also has been shared to manufacturer like: Fluid type, Density at operating base, Specific gravity, Compressibility at operating base, Molecular Weight, Isentropic exponent, Operating viscosity.

In summary, flowmeters are selected according to Engineering design.

Annubar Flowmeter: 3051CFADG300ZCHFS3A3D0072AA1P1V1V2QC7Q8J3G2

Related to Annubar hardware assembly information:

Flowmeter and meter type: 3051CFA - Annubar flowmeter flanged with opposite side support

Sensor size and material: 3  -  316 stainless steel

Line size: 750 mm (30 in) - Schedule: XS  - Material: Carbon Steel (A105)

ID (span): 736.6 mm -  Wall: 12.7 mm

Pipe orientation: Horizontal

Connection type: 300#RF ASME B16.5

Mounting type and material: 300#RF ASME B16.5

My Questions are focused on configuration and field calibration or verification:

What are the main considerations to properly configure this flowmeter? Do I should set up the pipe diameter, pipe wall and flow type (methane gas) in the flowmeter configuration?

What tool is needed to configure the flowmeter? At site we have the Trex communicator and realized that basic configuration has been seen and retrieved. Is this the only option or is there a software tool that can be used to configure this flowmeter and have the chance to see more technical information related to the Primary element (Annubar) as well?

How do we know if the Annubar sensing ports are starting to clog?

THALES CAMARGO 105

• 5 Dec 2025 2:41 PM
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5 Replies

• THALES CAMARGO 105

  

  • 5 Dec 2025 2:53 PM

  Range from flowmeter is: 0 to 60 in H2O. From sensor information > measurement type: Differential.
  If there is a manifold with Isolation and drain/vent valves and Equalizer valve, therefore, calibration for Zero trim and upper range calibration should be done similar to flowmeter 3051CD (commonly used). Thank you again for your valuable feedback related to this technical clarification.

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• Dan Cychosz

  

  • 5 Dec 2025 3:52 PM

  Hello,
  
  The 3051CFA will be configured from the factory based on the parameters that you provided during the quotation stage. There should be limited setup required during installation unless you need to change the measurement span, and a zero trim should always be performed upon final installation. Both of these actions can be done with the TREX, but if you are more comfortable with a laptop and HART modem then you can use the AMS device configurator for the 3051C transmitter (www.emerson.com/.../ams-device-configurator).
  
  There is very little technical information saved in the transmitter for this model, if you desire online flow compensation with temperature and pressure you could consider the 3051SFA (www.emerson.com/.../rosemount-sku-3051sfa-annubar-flow-meter). For surge control applications, you may also want to consider the recently introduced 4051SFA (www.emerson.com/.../rosemount-sku-4051sfa-annubar-flow-meter) which is available with a fast time response of <50 milliseconds.
  
  Plugging/clogging is rare for the Annubar due to the slot design. However, the 3051CFA can be ordered with option code DA1 which includes a plugged line diagnostic that will provide an alert if plugging is detected in the instrument.
  
  Hope this is helpful,
  Dan Cychosz

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• THALES CAMARGO 105

  

  • 5 Dec 2025 11:11 PM

  In reply to Dan Cychosz:

  Dan,
  
  Thank you so much for your valuable feedback, really appreciate it. Just to highlight these points, when you said "The 3051CFA will be configured from the factory based on the parameters that you provided during the quotation stage", Is it a chance to see this configuration like Fluid type, Line size, Pipe orientation, ID and Wall, Sensor size ??? By using the TREX, I have not found this information, just a basic information and configuration were retrieved.
  Regarding the sentence "There is very little technical information saved in the transmitter for this model" you mean that, as a final user for the I&C team, information stored in Flowmeter is limited when trying to retrieved information with TREX.
  Finally, for the 3051CFA calibration or verification, Zero trim and Upper trim (span) can be done like if it were the commonly used 3051CD differential pressure transmitter for flow application.
  Good point for the recommended 3051SFA for future considerations.
  Thank you Dan again for this final feedback. I am so grateful for this support!
  
  Kind regards,
  
  Thales

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• Dan Cychosz

  

  • 5 Dec 2025 11:32 PM

  In reply to THALES CAMARGO 105:

  Hi Thales,
  
  Yes, the configuration information (we call it a flow sizing) should be included in the paperwork/documentation provided with the instrument. The transmitter itself does not contain the information, rather it is calculated using Emerson's DP Flow Product Advisor (www.emerson.com/.../dp-flow-sizing-selection-tool) and then the calculation results input into the transmitter for the scaled variable output. If you do not have easy access to the documentation, you may will be able to get a copy from your sales representative or by looking up the serial number on MyEmerson (look under "My Assets" and enter the serial number, you may have to register if not already a user). If neither of those options are available to you, you can email me at [email protected] with the serial number or order number.
  
  You're correct on the verification (we don't recommend field calibration unless absolutely necessary or the instrument is found to be well out of range during verification) and zero trim are the same as you would do for a standard 3051CD instrument.
  
  Hope this helps, don't hesitate to reach out for further questions.
  
  Regards,
  Dan

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• THALES CAMARGO 105

  

  • 6 Dec 2025 5:57 PM

  In reply to Dan Cychosz:

  Thank you so much Dan for your valuable input, sure, I will reach you out in case is needed. Absolutely grateful for sharing your valuable feedback.
  Best regards,
  
  Thales

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