Electricity and Control June 2020

MEASUREMENT + INSTRUMENTATION : PRODUCTS + SERVICES

Pressure switch upgraded for high process temperatures Wika’s PSM-700 pressure switch with large adjustable switch differential is now able to withstand higher process temperatures.

Optionally, a switch with adjustable differential and fixed DPDT can be used with process temperatures between -30°C and +150°C. The PSM-700 features switch differential adjustable within a wide range of up to 60% of the setting range to realise flexible on/off controls. The product has reliable switching, due to a switch point repeatability of ≤ 0.5%. The measuring element is a fully welded bellow made of 316L stainless steel. The corrosion-resistant pressure switch is suitable for a broad range of media used in the process industry. The case is made of a high-grade aluminium alloy with which the pressure switch can withstand the harsh operating conditions of the process industry. For more information contact WIKA Instruments. Tel: +27 (0)11 621 0000 email: sales.za@wika.com Visit: www.wika.co.za software allows for true design, not just thermowell pass or fail. In use the Thermowell Design Accelerator presents an onscreen image which dynamically updates as tag data is input and the onscreen help feature identifies potential calculation issues like missing data or incorrect inputs. In addition, users get thermowell and matching sensor specification model codes for a quick and easy way to review, collaborate, purchase and share information with project teams. Thermowell Design Accelerator is part of Emerson’s portfolio of engineering tools, designed to help engineers quickly and confidently design solutions. It can be accessed anytime online and designs can be saved in the MyEmerson personalised digital experience. For more information contact Devesh Roopnarain, Emerson Automation Solutions. Email: Devesh.Roopnarain@Emerson.com Visit: www.emerson.com/ThermowellDesignSoftware

Previously, the switch could operate in process media within the limited temperature range of -30°C to +60°C. As a standard, the PSM-700 is now able to cater for process temperatures between -30°C and +115°C.

The upgraded PSM-700 pressure switch can withstand process temperatures from -30°C to +115°C.

Thermowell design software saves time Emerson’s Rosemount Thermowell Design Accelerator eliminates the biggest hurdle of temperature process design – manual thermowell iterations – significantly increasing operational efficiencies and cost savings. Recently launched, the Rosemount™ Thermowell Design Accelerator is a free online thermowell design tool that enables process design engineers to simplify the sizing of thermowells. It is easy to use and intuitively guides users through complex projects, saving hours of labour and other resources. Users will be able to iterate up to 1 000 thermowell tags automatically with a single click – all optimised for given process conditions. On average, engineers can spend 50 hours on thermowell calculations for a single project. Nearly 20 variables related to process conditions and thermowell dimensions are used to find a safe and efficient solution. Temperature points often need to be recalculated three to four times using traditional trial-and-error methods before passing global standards for safe operation as specified by the American Society of Mechanical Engineers (ASME). According to Emerson, using the Thermowell Design Accelerator, engineers can reduce design ideation time to just 15 minutes. The software uses ASME PTC-19.3 TW (2016) criteria and has built-in quality checks to confirm safe thermowell results that protect processes and the people that operate them. As the tool automatically iterates thermowell dimensional changes for safe use, it also tracks calculation history. Engineers get a breakdown for each thermowell iteration and the corresponding physical dimensional change to the thermowell as it calculates solutions. Engineers can review each step for how the thermowell was able to pass PTC criteria and have a reference for updating their design if process conditions change. The

The new thermowell design software from Emerson enables process engineers to reduce design time from hours to minutes.

22 Electricity + Control JUNE 2020