Product roundup: Calibrator capabilities accumulate
Combined functions, networking, documentation let users easily achieve calibration benefits
IS CALIBRATOR WITH COMMUNICATORMC6-Ex is an accurate, intrinsically safe (IS), documenting, multifunction field calibrator and communicator that calibrates pressure, temperature and electrical signals, and contains a field communicator for HART, Foundation fieldbus and Profibus PA instruments. It's an easy-to-use, IEC- and ATEX-certified calibrator that can be deployed in any Ex Zone/Division, even in the most demanding Zone 0/Division 1. MC6-Ex also communicates with Beamex calibration software, enabling automated, paperless calibration.Beamix Inc.770-951-1927EXPANDED TEMPERATURE RANGEJofra reference temperature calibrator (RTC) 187 provides temperature measurement from -45 °C to 180 °C, which is an increase of 25° C over its previous…
The expert inside, part 1—level
Process, power and plant controls join forces to achieve performance gains
Resource guide: calibration education
Fluke’s faster, easier pressure calibrator
Prevent pressure transmitter problems
Installation details make the difference in DP flow and level applications
Greg: Measurements are our only window into what a process is doing, plus, you can’t control something if you’re not measuring it. There have been great advancements in measurement technology. Smart transmitters have increased accuracy an order of magnitude or more, and drift is so slow that calibration intervals can be significantly extended. However, a measurement is only as good as its installation. Not enough knowledge is published or presented on how to make sure the installation doesn’t limit performance or create maintenance and reliability issues. Here, Hunter Vegas and I (cofounders of the ISA Mentor Program) offer what we think is important. The newest resource to our ISA Mentor Program, Daniel Warren, has stepped up to…
Why and how to use ultrasonic flowmeters for flare flow metering
How to meet the wireless flow measurement power challenge
Custody transfer flow measurement: Why can a DP flowmeter be used for gas but not liquid?
Process control as inventory control
This concept eases troubleshooting, CV-MV pairing, developing models and more
Often, chemical process control is fundamentally inventory control. Understanding the cause-and-effect of the inventory is key to understanding the process, troubleshooting, choosing appropriate controlled variable-measured variable (CV-MV) pairing, designing cascade or ratio structures, specifying safety overrides and developing models (either first-principles or empirical).Usually, we don’t measure the inventory. We measure the response to it. Unfortunately, an initial focus on the response often distracts the person from seeing the fundamentals. Recognize the fundamental mechanism. Here are several examples.Inventory of gas molecules results in pressure:A standard air compressor can be an example. The inventory relation of number of…
Product roundup: Multitalented level measurement devices
Is it wise or dangerous to back up differential pressure with nuclear instrumentation?
Virtual sensors validate vital data
Sometimes a level instrument is only as smart as the guy doing the calibration
Your DP problems could be a result of improper use of purges, fills, capillaries and seals
Here are some alternatives in terms of the use of purges and capillary systems
Greg: Last month we discussed a lot of potential problems with impulse lines. Here, we get into what are some alternatives in terms of the use of purges and capillary systems, particularly to deal with problems with solids, polymers, hazardous materials, and corrosive and sticky fluids that could plug lines, coat and corrode surfaces, or present safety concerns in terms of maintenance. Hunter and I, (co-founders of the ISA mentor Program) continue this conversation on DP and PT installations.
Some basic requirements that come to mind are associated with the purge flow rate not creating a variable significant offset in the measurement due to purge pressure drop or by effect on the process. The purge flow must be constant for all lines. For…
Digital technology redefines scope of pressure measurement applications
Mechanical innovation opens pressure measurement horizons
Emerson marks 50 years of pressure instrumentation innovation
Ask the Experts: Cascade reactor temperature control
How to set up and tune external heat exchanger controls for safety and stability.
Q: I have two questions regarding a process transfer function determination. We have a semi-batch exothermic polymerization reaction, and the reactor is provided with a jacket and an external heat exchanger to control the temperature (Figure 1). The cascade master controller controls the reactor temperature, and manipulates the setpoints of two slave controllers, one on the jacket, the other on the external heat exchanger.First, does it make sense for the master controller to send the same setpoint for both slave controllers? If it does, are there preconditions, such as "jacket has dominant effect on reactor temperature?” If not, could you please tell me why, and give me some suggestions how to do this?Second, I want to test the design…
Watlow introduces new heater catalog
Watlow introduces SELECT for heater, sensor and controller products
2017 State of Technology: temperature and pressure measurement
Meggitt offers HART-enabled vibration sensors
Meggitt's PCH420V vibration sensor has a programmable transmitter that allows vibration data to be accessed by HART enabled process controllers.
Meggitt's PCH420V is the first HART®-enabled piezo-electric vibration sensor enabling continuous online monitoring of balance-of-plant assets with a digital connection to PLC or DCS systems for local analysis of multiple vibration bands. They are capable of installation in multi-drop configurations and reduce wiring requirements. HART functionality enables the user to specify vibration frequency bands, detector types and full-scale measurement ranges—effectively enabling field-configuration for specific monitoring requirements.
PCH420 sensors are powered by the network for continuous coverage, unlike wireless solutions only offering snapshots of asset performance and employing batteries that require frequent replacement. Utilizing PCH…
Designing and testing networking devices for harsh environments
2016 Readers' Choice Awards
Meggitt provides HART-enabled piezo-electric vibration sensors
Resource guide: Weighing systems
Pressurization affects hopper weight
Resource Guide: Weighing systems tip usefulness scale
Improve efficiency by combining wireless and analytics
Pairing the technologies eases evaluation of process units with little or no wired instrumentation
Plant managers always are looking for ways to improve operational performance or reduce costs. This effort involves many elements; much hinges on the condition and performance of process equipment. Getting a handle on relevant metrics requires effective instrumentation and data analytics — which often can pose challenges due to a lack of measurement points and the complexity of data analysis software.Wireless instruments can provide a more cost-effective and easy-to-install solution to provide efficient data streams. Of course, you must always balance the cost of WirelessHART instruments and the possible downtime from installing them against expected benefits. Presuming you can justify installing WirelessHART instruments, you certainly…
Water-in-oil analysis uses controlled vortices
High-pressure mass spectometers offer robust, real-time, in-situ analysis.
Gas safety for semiconductor fabs
E+H unveils new Midwest temperature, analyzer plants
Monitoring versus controlling has a significant impact on system design
Flow measurement techniques continue to grow and evolve with new methods such as multipath ultrasonic, magnetic and Coriolis increasing at the expense of more traditional technologies such as orifice, weir and other differential pressure (DP)-based techniques. The increased use of these new technologies is partly a result of the increased capability of microprocessors and sensors to enable measurements not possible without enhancements in these areas. Another reason for their adoption is that, in most cases, they also provide higher accuracy and rangeability than DP technologies. But most of these flow measurement techniques tend to require