Rosemount 5300 GWR certified for safety-critical level 13 June 2014

Emerson Process Management's Rosemount 5300 guided wave radar (GWR) process level transmitters have now been certified to IEC 61508 for safety instrumented process plant functions to SIL 3.

Plants in the oil and gas production, refining, petrochemical, chemical and power sectors can now use the 5300 GWR for safety-critical level applications, including overfill prevention and dry pump protection.

The functional safety assessment was performed by the independent global organisation exida. It covered SIL 2 rated safety applications in a single configuration, and SIL 3 in redundant mode.

The certification means that the Rosemount 5300 GWR is suitable for continuous level measurement in safety instrumented functions up to SIL 3, as defined in IEC 61511.

Traditionally, fixed point-level devices have been used for overfill prevention and dry pump protection.

However, the 5300 GWR provides continuous level measurement, including product surface location - confirming that the level sensor is functioning correctly. Its high and low level alarms can be set up locally or remotely.

Proof testing is required at regular intervals to confirm that overfill and empty tank protection functions result in the appropriate system response.

However, these conditions can also be simulated either locally using a HART-compliant master – such as a Rosemount Radar Master or a Field Communicator – or remotely, using Emerson's AMS (asset management suite) software.

By removing the need to perform traditional wet tests, which require the tank to be under or overfilled, the cost and risks associated with proof-testing are considerably reduced.

Brian Tinham

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Emerson Process Management

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