One of the benefits of advancing technologies can be increased reliability. For measurement devices in the processing industries, these technology improvements can mean increased operations and maintenance productivity through extended calibration intervals, improved measurement repeatability, and overall improved measurement stability.Emerson’s Michael Olivier shared with me improvements that have been made to the Rosemount 3051S Series of measurement instrumentation. This series of measurement devices was first introduced in 2001. The 3051S Series encompasses pressure, differential pressure (DP) level, DP flow, and Multivariable (differential pressure, static pressure, and process temperature measurements along with mass and energy flow) transmitters that can communicate via digital 4-20mA HART protocol, IEC 62591 WirelessHART, and Foundation fieldbus.
Michael noted that stability has been extended to 15 years as well as the limited warranty due to optimizations in the SuperModule sensors within these devices. These sensors are all-welded hermetic stainless steel (SST) design and provide up to ±0.025% accuracy and 200:1 rangedown (ratio between the sensor upper range limit and the calibrated span) and up to ±0.04% of reading and 14:1 flow turndown.
One innovation he highlighted to me was a new process isolating diaphragm design and shaping enhancements along with new ultra-high precision manufacturing equipment which were instrumental in extending the long-term stability of these devices.
Process manufacturers and producers can achieve 15+ years of process and measurement repeatability over time under installed operating conditions—resulting in improved batch-to-batch quality and reduced process uncertainty. Calibration intervals can be extended to minimize time and costs spent on maintenance and troubleshooting.