The method used to calibrate a meter prior to shipment is key to its subsequent performance in the plant. Krohne has been manufacturing flowmeters for over 80 years. Before any of its electromagnetic or ultrasonic meters are shipped to a customer, they are wet-calibrated by direct comparison of volumes - the most accurate method. Coriolis flowmeters are calibrated by comparing masses using high precision calibrated scales.
Accuracy and reproducibility are key quality attributes of a flowmeter. The PTB's (German national metrology institute) transfer standard relies on Krohne flowmeters. Transfer standards generally ensure the accuracy of calibration rigs from manufacturers of measuring instruments.
Krohne is PTB's transfer standard. The PTB uses a mobile measuring station with a measuring section consisting of several electromagnetic Krohne flowmeters and fixed inlet and outlet runs to validate other calibration rigs with respect to transfer standard reproducibility (0,02% of measured value). That is, when PTB calibrates calibration equipment from other manufacturers, the accuracy and reproducibility is based on Krohne flowmeters. Aside from PTB, other standards calibration authorities in Europe also rely on Krohne flowmeters for their transfer standards, including BEV in Austria.
Krohne lays claim to the largest and most accurate calibration rigs in the world, having a global network of advanced calibration rigs that it uses to ensure the reliability of its flowmeters. Krohne operates the world's largest and most accurate calibration rig for electromagnetic and ultrasonic flowmeters in Dordrecht, The Netherlands.
The height of 42 m allows measuring instruments with a diameter of 3 m and flow rates of up to 8 kilolitres per minute to be calibrated. The calibration tower has a capacity of one-half million litres of water. The calibration volume of Krohne's Altometer tower has an uncertainty of 0,011%. This fulfils the requirements of all custody transfer standards in the oil and gas industry.
Krohne operates additional calibration rigs accredited to the strictest calibration standards in Germany, France, Great Britain, the United States, Brazil, China and India. The company is also able to calibrate flowmeters together with their inlet and outlet runs for particularly difficult and demanding applications.
For more information contact Kruben Bennie, Krohne, 011 315 2685.
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.
printer friendly version