Sound Solutions to Flow Measurement Problems!
For more than 30 years, Titan Enterprises has been working in the flow measurement industry. It takes pride in its ability to offer technical solutions for customer applications in instances where standard products may not be suitable.
Investigating an issue
Such a situation occurred recently. A Process Altrato ultrasonic time-of-flight flowmeter was being used by a long-term customer in order to measure fluids within an industrial process. However, after their process had been operating for a prolonged period of time, the customer recognized issues with the flow measurements’ reliability.
After voicing their concerns, the customer sent performance data back to the Titan Enterprises’ technical team, who investigated what the issue was. In order to enable in-situ acoustic mapping of the ultrasonic meter by the customer, a Process Altrato was modified. The issue became clear after further investigations with the process variables and the data provided.
Fluids which transmit ultrasonic sound waves at ±30% of the speed of sound in water at 20 oC can be reliably measured by the Process Altrato. If a fluid has acoustic characteristics which differ more significantly, however, the sensors may miss the acoustic operational window.
In the case in question, the measured organic process fluid was within the ±30% of the water speed of sound window at 20 oC. However, as the customer process carried on, the speed of sound was depressed noticeably as the fluid warmed, until a point was reached when the signal could no longer be reliably measured.
The technical team was able to resolve the issue after discovering this ‘warming effect’. They did so by recalibrating the measurement window to the specific requirements of this application. It was still possible to achieve the recalibration using a water-based reference in this application, producing repeatable flow results which ensured that the customer’s process could continue normally.
The Process Altrato is a device which can only be configured in the factory. This means that if your process’ fluid speed of sound is anticipated to differ significantly from that of water, performance window configuration must be performed at the factory prior to shipping.
The Standard Altrato can be used by customers who desire more functionality with their installed meters, as it has PC-based user interface software. In order to make sure that you always measure at the optimal point of signal, there is an option within the software to move the measurement window manually.
This information has been sourced, reviewed and adapted from materials provided by Titan Enterprises Ltd.
For more information on this source, please visit Titan Enterprises Ltd.