Calibration tests were carried out at Eskom Enterprises - Technology Services International (TSI) Flow Laboratory (SANAS Accredited Calibration Laboratory, No.901). Nine readings were taken on a 600 mm line at various flow rates, with errors varying from +0,21 to +0,93% of measured value. The measurements were consistent, reflecting a systematic error. As shown on the graph, a straight line has been fitted through the errors and the systematic error has been subtracted from the results obtained at the flow laboratory. The resultant errors as stated in the calibration certificate now fall in a tight band well within the uncertainty of calibration of ±0,23% as stated in Eskom's certificate. N&Z's conclusion is that had this correction been done (and the Fuji meter has a built-in facility to do just this by removing the offset and slope errors) measurement accuracies of ±0,23% could have been obtained.
This clearly demonstrates that with a spool piece of known parameters (material, outside diameter and pipe thickness), the Fuji ultrasonic flowmeter is accurate. Of course, for on-site applications there is uncertainty of pipe parameters and the possibility of the pipe being corroded or coated internally. The solution to this application uncertainty is to carefully measure the pipe parameters where possible; alternatively insert a suitable spool piece of known parameters. (The spool piece approach is inherent in mag flowmeters, which normally consist of a spool piece on which the coils and electrodes are mounted.)
A major advantage of the Fuji ultrasonic flowmeter is that the sensors are completely nonintrusive and can be removed at any time without interrupting the flow. All Fuji's sensors and converters are interchangeable, so if there is a failure due to, for example, a lightning strike, the damaged component can simply be exchanged. If laboratory calibration is required, the sensors and converter can easily and inexpensively be removed without interrupting the flow.
N&Z points out that this flowmeter also has major price advantages especially for larger lines. For example, the company says that in the case of a 900 mm line, the Fuji ultrasonic meter would be less than half the cost of a typical mag meter.
Ultrasonic flowmeters have been proven to be as accurate as mag flow meters if installed with the necessary caution, and offer great benefits in terms of maintainability and plant downtime.
Ultra-compact mass flow meters with advanced transmitters Emerson Automation Solutions
Flow Measurement & Control
Emerson has introduced the Micro Motion G-Series line of Coriolis mass flow and density meters, the most compact dual-tube Coriolis mass flow meters on the market. They offer the same level of quality and reliability as standard designs, but in a much smaller and lighter form factor.
Read more...Optimisation of alkaline electrolysers Samson Controls
Flow Measurement & Control
his application study relates to the use of a smart meter valve in alkaline electrolysers, and is based on proven experience with one of the biggest hydrogen electrolyser producers in the world. The project proves that the smart meter valve’s added functionality creates an ideal setup in alkaline electrolysers for reducing cost and improving functionality and system performance.
Read more...Preventing spills and improving operational efficiency
Flow Measurement & Control
In an industry where every spill carries a hefty price tag, Point Energy Partners found that the manual and low-tech systems at their saltwater disposal sites were a significant problem.
Read more...Accurate flowmeter for oil & gas Endress+Hauser South Africa
Flow Measurement & Control
Promass Q, the high-tech Coriolis flowmeter from Endress+Hauser, is now also available for larger pipe sizes with maximum flow rates between 850 and 2400 tph.
Read more...Optimising CIP processes with precision instrumentation Endress+Hauser South Africa
Flow Measurement & Control
Many food and beverage manufacturers encounter challenges with CIP processes that take too long. Have you considered exploring potential solutions to address these issues?
Read more...How predictive maintenance will help tackle water scarcity ABB South Africa
Flow Measurement & Control
The water industry is facing increasing pressure to optimise treatment processes and address the impending global water crisis. ABB’s global product line manager, Krishna Prashanth suggests how the integration of smart instrumentation and predictive maintenance can ensure the highest quality treatment of water.
Read more...Flowmeters with faster and more reliable data transmission ABB South Africa
Flow Measurement & Control
ABB has launched the CoriolisMaster and ProcessMaster flowmeters, which can be powered over the same Ethernet cable used for data transmission, eliminating the need for separate cabling.
Read more...Ice cold optimisation Turck Banner Southern Africa
Flow Measurement & Control
A well-known industrial company in China specialises in the research, development and production of high-tech materials and special industrial furnaces for various fields and applications. To ensure the safe and efficient operation of the furnaces, the flow and temperature of the cooling water and the energy consumption must be constantly monitored and controlled. Turck’s FS+ flow sensors are ideal for this application as they can monitor the temperature of the cooling medium in addition to the flow.
Read more...How wet steam undermines boiler efficiency Endress+Hauser South Africa
Flow Measurement & Control
The Endress+Hauser team understands the daily challenges and demands placed upon energy and utility managers across the spectrum of steam generation, distribution and consumption activities. Its global team is committed to working with its partners to overcome these complexities and particularly those that challenge a safe, economic and sustainable source of steam energy production and delivery.
printer friendly version