Pressure Measurement & Control


ABB’s pressure transmitters

August 2017 Pressure Measurement & Control

From the design to the software functionality, the 266 series represents the latest evolutionary step in the wide ABB product portfolio. Users can easily find the right application solution for their measurement needs and select among different levels of accuracy.

Performance

The 266 is available with accuracy from 0,075% up to ‘top performance’ of 0,025%. This allows the user to control processes with excellent precision for pressure, level and flow measurements. Accuracy is no longer a constraint.

Notable is also the choice of measuring ranges from 0,05 kPa up 105 MPa. The 266 is one of the few low range differential pressure transmitters offering outstanding suitability draft range measurements. Pressure transmitter models are suitable for measurements up to 1050 bar using Inconel 718 NACE compliant material for wetted parts.

One further highlight available with the 266 differential pressure transmitter is the version for high static pressure applications. This allows users to measure differential pressure with a high accuracy in applications with maximum working pressure (MWP) up to 60 MPa. This version also includes Ex certifications, if required.

Construction

ABB was one of the first companies to offer all welded diaphragm seals. The entire assembly (sensor-capillary-diaphragm seal) does not involve gaskets or threaded joints. All the welded parts and the hydraulic circuits are rigorously helium leakage tested and the ‘all-welded technology’ is recognised for delivering long-term performance stability, even for vacuum or high temperature applications.

ABB offers the 266 with a wide variety of in-house engineered diaphragm seals, which means you will rarely find an application where the right solution regarding design, process connection or material is available.

Operation

ABB now offers on its HMI the TTG (through the glass) technology. With this exclusive and innovative option, users can interact directly with the instrument, without removing the windowed front cover, saving costs and time especially in hazardous areas.

Using ABB’s proven four-button HMI with intuitive menu navigation and easy setup menu, configuration times can be greatly reduced. Moreover, expensive hand-held configurators are no longer necessary since all the essential parameters can be set via the HMI with just one touch.

The external non-intrusive zero and span push buttons allow users to re-range the transmitter safely in a few seconds. An additional external write protection is also provided.

Maintenance and safety

The new design enables in-field maintenance operations. Both terminal block and communication boards can be replaced in a few minutes without the need to reconfigure the transmitter. Failures due to lightning, wrong earth wiring, etc. are not now an issue: 266 is protecting your plant productivity smartly.

The PILD (plugged impulse line detection) diagnostic is offered as standard and alerts operators to solids or frozen fluid plugging the impulse lines during measurement of flow or pressure, making the measurement unreliable. Once a process anomaly is detected, the PILD function will generate a warning on the local LCD as well as via the communication protocol.

The 266 series is certified by TUV Nord for use in safety instrumented systems as per the requirements of IEC61508. The transmitters meet the requirements for SIL2 applications in a single transmitter configuration (1oo1) and for SIL3 applications in a redundant configuration (1oo2).

Another pressure transmitter in the 2600T family is the 261 series. It is a high quality cost-effective pressure transmitter designed into a compact stainless steel housing to save space. It has an accuracy of 0,1% and fulfils the requirements of PEF and SIL2.

For more information contact ABB South Africa, +27 (0)10 202 5000, instrumentation@za.abb.com, www.abb.com/pressure


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