MAY-JUN 2019

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INTECH MAY/JUNE 2019 39 Solutions like wireless instruments, automatic work per- mits, risk-based maintenance, remote maintenance, robotics, and self-calibrating instruments will be used more and more. Printed PM sheets for equipment and instruments will be re- placed by additional smart sensors, like acoustic detectors, video, and infrared cameras. Digital transformation can also extend monitoring into the instrumentation utilities (i.e., the quality of instrument air and power supply). Digital transformation will also provide more efficient and safer PM by remote condition monitoring and built-in analytics and can provide faster resolutions to problems by having more data and more efficient spare parts man - agement. Control valves are another beneficiary of digitalization, where the cloud can be used to obtain data from the field, predict the life and performance, and also estimate the time for overhaul. Video and augmented reality, used to monitor and train the maintenance crew on valve maintenance, will be part of this digital transformation. PM procedures for process instrumentation This section highlights recommended PM tasks for common instruments. It covers SIS input and output devices, con- trol valves, motor operated valves (MOV ), transmitters, gas and flame detectors, thermowells, process flowmeters, flare flowmeters, process actuated switches, level gauges, vibra - tion circuits, and skids instruments. An analytical approach This article gave guidelines for digitizing and optimizing the instrumentation PM program, an important task that every company needs to perform to avoid an unnecessary main - tenance work load, eliminate operational losses, cut unnec- essary costs, and digitally transform conventional PM into analytical maintenance. The scope of this exercise included revisiting the instrument type, PM scope, PM frequency, the PM task performer, and the task sheet. Using smart sensors and analytics (digital transforma- tion) lets process facilities move into performance-based and shutdown-based preventive maintenance. They elimi- nate or greatly reduce the conventional preventive mainte- nance for instrumentation, and replace it with an analytical approach, which uses data to monitor the instrument per- formance and predict failures. ■ ABOUT THE AUTHOR Fawaz AlSahan, CAP, SCE (, is the chairman of Saudi Aramco instrumentation standards, a member of the Saudi Arabia Standards Committee of Electrical Metrol- ogy, and a voting member of ISO technical committees. AlSahan has more than 20 years of experience in design, technical sup- port, and maintenance of instrumentation and automation sys- tems. He has several published papers, teaches several courses, and holds several patents. View the online version at Gas analyzer for hazardous area zones I and II To use and valorize natural gas, it is necessary to control its com- position. Even if it is composed mainly of methane, natural gas contains some traces of sulfur compounds that can affect its quality and lead to pipe corro- sion during transport. There- fore, companies that work with natural gas want to control the level of sulfur compound im- purities as well as add specific Mercaptans to odorize the gas and make it easily detectable. The energyMEDOR mea- sures with speciation the fol- lowing sulfur compounds gen- erally present in the natural gas: H 2 S, DMS, DMDS, and Mercaptans. This instrument works in hazardous areas, such as ATEX zone 1 with- out any purge gas requested for operation. The MEDOR Ex d uses MEDOR wet cell detector technology to analyze these sulfur compounds in hazardous areas without purge gas. The instrument needs only a very small amount of zero air or nitrogen to operate (down to 4 mL/min), and the wet cell Sulfur Specific Detector detects sulfurs as low as 1 ppb. This certified analyzer can operate in zone I and II and can be used with 230V, 115V, and 24V DC power supplies. Chromatotec, Point level switch The Nivector FTI26 point level switch detects all types of powdered and fine-grained solids, such as plastic granules, detergent, grain, sugar, and other dry materials. The switch can be installed at the top of a tank to indicate high level, or at the bottom of a tank to indicate low level. The switch is a capacitance device that fulfills all hygienic requirements, such as 3A, EHEDG, and FDA. It is cleanable up to protection class IP69. No additional or individual adjustments to different media are necessary. The function of the switch can be checked via LED signalization without dismounting the device. Endress+Hauser, Two-wire loop-powered Coriolis transmitter The Micro Motion 4200 two-wire loop-powered Coriolis trans- mitter can replace existing two-wire flow devices. The device can accommodate a line size of 4 inches and has an onboard real-time clock for diagnostics. The unit is available in a remote- mount option for applications that require the transmitter to be located separately from the sensor. The 4200 transmitter pro- vides a viable migration path where Coriolis meters were previ- ously not practical as a two-wire solution. Emerson, SPECIAL SECTION New instrumentation products

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