For safety instrumented systems, proof testing is a periodic test performed on the SIS to detect dangerous undetected failures in its components. For level sensors used in storage tanks, this may mean the dangerous task of climbing the tank to perform this testing.

This two-and-a-half-minute YouTube video, Save Costs and Simplify Proof Testing with the Rosemount™ 2140 Level Detector, describes how the Rosemount 2140 level detector‘s vibrating fork, with smart diagnostics and fully integrated remote proof-testing, streamlines the process.

This level detector is suitable for overfill safety-critical applications for high-high-level detection. The fully integrated partial proof test function enables operators to perform a functional test from the control room without sending personnel to the device in potentially hazardous areas.

The partial proof test is activated remotely via digital HART communications. The device enters test mode and cycles through different current output levels to exercise the processing and output electronics to identify dangerous, undetected failures that may prevent the device from functioning correctly upon a safety demand. Upon completion of the testing, it returns to operational mode automatically.

Visit the Rosemount 2140 Level Detector section on Emerson.com for more information about this device and its suitability for critical overfill prevention applications.