Emerson Exchange 365
Blogs
    • 9 Aug 2017

    When you need to know more...

    One of our midstream energy customers in Colorado recently upgraded their Rosemount 2120 level switches to the brand new wired HART Rosemount 2140 level detector. Frustrated by the lack of information they were getting back from the level switches due to a lack of remote diagnostics functionality, the company wanted a smart device that would not just send an alarm in the event of an overfill, but would also alert in advance...
    • 8 Aug 2017

    Proof Testing Level Measurement Devices

    Safety instrumented systems (SIS) include the sensor(s), final control element(s) and logic solver(s) for each of the safety instrumented functions (SIFs) in the SIS. To verify the SIFs are performing the amount of risk reduction intended for their application, they must be periodically proof tested. PCN Europe magazine interviewed Emerson’s Teddy Tzegazeab on how proof testing has changed for SIFs with liquid...
    • 26 Jul 2017

    What good is a safety level measurement if you can’t trust it?

    What good is a safety level measurement if you can’t trust it? A coal fired power plant installed an electronic gauging system for both level indication and level alarms on their plant’s steam drums. The system was configured to give Hi and Hi-Hi alarms and to shut down the boiler in case of emergency. However, within two years of operation they experienced leaking electrodes, and some of these leaks then...
    • 13 Jul 2017

    Level Sensor Safety Proof Testing

    Backing up your computer or server is a waste of time if restoring the backup fails when you need it. Good practice is to test these backups on separate test systems periodically to make sure they restore properly. Similarly, safety instrumented systems (SISs) need to assure that each safety instrumented function (SIF)/safety loop does what it’s intended to do to bring the plant to a safe state in the event of a...
    • 30 Jun 2017

    Remote Partial Proof Testing Level Sensors

    For safety instrumented functions (SIFs), proof testing is the process of identifying undetected dangerous failures in the sensor, final control element and logic solver which comprise the SIF. Dangerous failures are those that could put the safety instrumented system (SIS) in a hazardous or fail-to-function state. If undetected, in the case of level measurements, this could lead to an overfill and spill, with potentially...
    • 28 Jun 2017

    Increasing safety through remote proof-testing

    The proof-testing of safety instrumented systems in liquid level measurement applications has traditionally relied on workers in the field. However, our latest technology advancements in modern smart devices is enabling this vital task to be performed remotely, bringing significant safety, efficiency and cost benefits. Read about it in our white paper here: http://bit.ly/2uiurFd
    • 27 Jun 2017

    Using Flushing/Drip/Calibration Rings in Pressure and Level Measurements

    If you work with pressure measurement instrumentation, you may have heard the phrases drip rings, flushing rings or calibration rings. These are used for pressure and differential pressure (DP) level measurement devices where diaphragm seals are used. I bring this up because I received an email recently that asked about these [edited and paraphrased to protect confidentiality]: Can you advise where in the Emerson...
    • 6 Jun 2017

    Continuous Floating Roof Tank Condition Monitoring

    Floating roofs are used on storage tanks to minimize vapor space between the top of the tank and the level of the liquid, typically a petroleum-based product, inside the tank. Per the External floating roof tank Wikipedia entry: The roof rises and falls with the liquid level in the tank. As opposed to a fixed roof tank there is no vapor space ( ullage ) in the floating roof tank (except for very low liquid level...
    • 1 Jun 2017

    Accurate Level Measurement for Efficient & Reliable Boiler Performance

    If you’re unfamiliar with the phrase “ heat rate ” used in the electrical power generation industry, it means the amount of heat energy in BTUs as input to the turbine generators divided by the amount of electricity generated in kilowatts. Accurate level measurement in the boiler drums and feedwater heaters is critical to optimize efficiency and run the turbines reliably over time. Matt Brummer Level...
    • 28 Mar 2017

    Reducing maintenance and improving safety and reliability on supercritical steam lines

    The Mobrey Hydratect 2462 Water and Steam Detection System is the modern equivalent to float level switches and is suitable for process conditions of 4350 psi / 300 bar and 1040° F / 560°C. It is used on safety critical applications to detect the unwanted presence of water in steam, or the water level within a steam drum. A new Emerson case study details a typical application for the Mobrey Hydratect 2462. The...