Why use the square root feature in a transmitter?

Video FAQ

What is the transmitter square root function and why you should use it?

• It is a function on differential pressure (DP) transmitters that calculates the process flow using differential pressure readings.

Why would you use the square root (SQRT) function?

• When using differential pressure applications for flow measurement.
• 50% of all applications still use DP flow to measure flow.

Why is it important for everyone involved to understand where square root (SQRT) is calculated?

• The transmitter can do the SQRT calculation, or it can be done in the DCS or controller. Make sure it is well documented.
• Make sure it is well documented to eliminate confusion and false assumptions.
• Best practice is to perform the SQRT calculation in the DCS.
• Calculated flow values can shown on the transmitter display, while the pressure reading is transmitted to the DCS for the final calculation.
  • Yokogawa DPs can be set to display the square root measurement so field technicians can see what is going on in the process.
  • For more information on Local Parameter Settings, watch Yokogawa Pressure Transmitter LPS Overview

For immediate assistance or to ask your own question, please use the chatbox to the right, contact us at support@us.yokogawa.com, or 1.800.888.6400