Level measurement, which is the detection of the phase split between vapor/liquid, liquid/liquid, vapor/solid and even liquid/solid, is a key parameter in the operation and control of modern industrial processes. A reliable outcome depends on the phase conditions being relatively consistent under all process conditions. Unfortunately, the importance of level control isn’t always understood. Failure to measure level reliably has resulted in some of the most serious industrial accidents, including those at the Buncefield, U.K., fuel storage depot and BP’s Texas City refinery. In this Chemical Processing Level Management eHandbook, we discuss best practices for level management including:
How to Select the Right Liquid Level Sensor - It’s important to consider a variety of factors when choosing the type of technology
Multivariable devices - gain operating and maintenance benefits
Achieving level control with dP transmitters - it appears simple but really is not
Download your copy of this Chemical Processing Process Level Management eHandbook now.
The Every Man’s Guide to OPC is an easy-to-read overview of the most popular industrial open connectivity standard - OPC. This paper introduces the main idea behind OPC, shows why OPC is different from conventional (often proprietary) communication protocols, and explains how OPC helps overcome the limitations of such native protocols. Next, the paper explains what the building blocks of OPC are (OPC Clients and OPC Servers) and how they work together to make data-sharing possible.
This guide to OPC helps readers of all technical levels quickly grasp what OPC is and how they can use it.
Many industrial plants use dissolved air flotation to remove fats, oils and grease, and suspended solids from wastewater. Chemical additions are often kept higher than necessary to account for variations in influent water quality that are characteristic of industrial facilities. Continuous monitor
The purpose of installing a flowmeter system is to accurately measure flow in a reliable manner. Issues related to physical properties, process parameters, electronic features and interconnections are often given much consideration. Relatively little emphasis, however, is given as to how well the flowmeter will perform its intended purpose. Adding to the confusion are the differences in how performance is expressed and the incomplete nature of the available information. Nevertheless, the quality of flow measurement should be a concern. This Chemical Processing eHandbook takes a look at technologies and solutions affecting flow including:
* Coriolis meters - steps you can take optimize performance when faced with entrained gas
* Magmeters -- why you should consider using them
* How to achieve effective flow control with centrifugal pumps
Dependable pH determination in chlor-alkali brine is notoriously difficult. Process conditions and high impedance signals from pH sensors mean maintaining measurement accuracy has been a headache for instrumentation engineers - until now.
Precise process control strategies have accelerated the use of on-line chemical composition analyzers in plant applications. Contaminants in plant samples are the most frequent cause of problems with on-line analyzers. Trace contaminants can rapidly build up and cause instrument failure.
Implementation of rapid loss on drying and ash analyzers significantly reduces testing times associated with traditional methods, allowing companies to bring products to market faster, increasing production. These features will aide biomass material manufacturers in maximizing control of the market.
The performance of wireless networks can change over time due to increased performance demands, changes in the radio frequency (RF) environment and changes in the physical environment. This article will explore the use of a wireless diagnostic OLE for Process Control (OPC) server technology to embed diagnostic information in human machine interfaces (HMIs), thus optimizing industrial wireless network performance.
Jim Ralston, Wireless Sales Engineer, ProSoft Technology
One of the difficulties of managing projects that involve several (perhaps many) organizations is that the group has no pre-established procedures for handling actions that cross organizational boundaries. This white paper by Project Success Incorporated discusses the development of a procedures manual.
The WirelessHART standard provides a robust wireless protocol for the full range of process measurement, control and asset management applications. Based on the proven and familiar HART protocol, it enables users to quickly and easily gain the benefits of wireless technology while maintaining compatibility with existing devices, tools and systems.
Advanced diagnostics, some of which are available today, will go beyond alarming transmitter
failures to actually predict impending failures in the complete measurement system. This will
significantly reduce unscheduled shutdowns, and also reduce the risk of onscale failure.
In the real world, sharing PCN data with external systems and accessing PCN systems from external
sources is fast becoming a business necessity. This paper provides some generic guidelines for enabling
secure connectivity between PCNs and external systems.
OSHAs Hazard Communication Standard (HCS) is based on a simple conceptthat employees have both a need and a right to know the hazards and identities of the chemicals they are exposed to when working.
Calibrating your instruments using specialty gas will only yield results as accurate as your gas mixture. This three-page white paper discusses analytic traceability and how it relates to gas mixture accuracy.