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Temperature Blog
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Engineering Thermowells Successfully
4 months ago
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Flow Blog:
Technology and Instrumentation
Anonymous
Since the creation of the first transmitter there has been a marked shift in technology. This includes the technology used for both transmitters and process control systems. The early pneumatic (3 – 15 psi) systems gave way to electronic systems (4...
8 Aug 2011
Temperature Blog:
Turbomachinery, Reliability and Instrumentation
Anonymous
Within a process plant there is all kinds of turbomachinery, including compressors, pumps and fans. They are generally steam driven and move a lot of fluid. They are large. They are expensive. The manufactures of turbomachinery will include basic...
5 Aug 2011
Pressure Blog:
Benefits of Drift Specification
Anonymous
Since the invention of pressure transmitters, manufacturers have sought to improve their performance. This includes accuracy, repeatability, speed of response and long-term stability. As design methods and raw material supply has improved, all of these...
4 Aug 2011
Temperature Blog:
Wireless Transmitters and Rotating Equipment
Anonymous
When a piece of process equipment rotates as part of its normal operation, it becomes challenging to obtain any type of measurement on the rotating part. Rotary calcination equipment, kilns and liquid filling machines can all benefit from process measurement...
3 Aug 2011
Flow Blog:
A Great Way to Shrink the Shrinkage
Anonymous
Custody transfer is defined as the way to measure the commercial exchange of a commodity. When a business purchases a commodity, there is a pre-established method to verify the amount of product purchased. Gasoline, chemicals and even milk is all traded...
2 Aug 2011
Temperature Blog:
High Density Temperature Transmitters
Anonymous
In order to reduce installation and operational costs, process plants have ofter used RTDs or thermocouples without a transmitter for temperature measurement. This is especially true for high density temperature measurements like distillation columns...
25 Jul 2011
Pressure Blog:
Instrumentation and Root Cause Failure Analysis
Anonymous
When rotating equipment fails, it is quite common to perform a root cause failure analysis (RCFA). The RCFA, unfortunately, is not done properly, as it only captures the first level of what failed and what likely caused the failure. A true RCFA will...
2 Jul 2011
Analytical Experts Blog:
Mass Flow Measurement for Fuel Gases
Jim Cahill
Online communities continue to grow and prosper as the capabilities of social sites and software platforms continue to advance. I received an email from a student in France who asked: I would like information on the products you offer in mass flow measurement...
10 Jun 2011
Temperature Blog:
Improving DP Flow Measurements with Multivariable Instruments
Anonymous
Differential Pressure (DP) flow meters have long been the common method for measuring flow in a process. Any obstruction in a flow path creates a differential pressure which can be measured. Using the relationship of DP and flow a fairly accurate and...
7 Jun 2011
Temperature Blog:
Accounting for Density in DP Level Measurement
Anonymous
With 75% of process level being measured with differential pressure (DP) there are a lot of measurements that are not temperature compensated. Although the fluid made not change any temperature effects can alter the accuracy of the measurement significantly...
4 Jun 2011
Pressure Blog:
Statistical Process Monitoring and Cavitating Pumps
Anonymous
Cavitation is a common source of pump failure. Vibration monitoring is the general technology used to capture this condition. However, it does not always work because the impact of cavitation cannot be discerned within background noise. Pressure transmitters...
29 May 2011
Temperature Blog:
Reliable Temperature Measurement with Dual RTDs
Anonymous
Temperature transmitters with RTDs are the common technology for measuring process temperature. While these are inherently reliable (there’s not much to them) process upsets and vibrations can leave you without good (and reliable) process data. Dual...
25 May 2011
Level Blog:
Eliminating Temperature Effects in DP Level Measurement
Jim Cahill
Differential pressure (DP) measurement has long been used in tank and other vessel level measurement. Level is calculated by taking the difference in pressure divided by the specific gravity of the liquid. I caught up with Emerson’s Anshuman Prasad, a...
6 May 2011
Level Blog:
Guidance for Radar Level Measurement Applications
Jim Cahill
Recently we’ve had a few level measurement-related posts–one on a refinery desalter vessel application and another on guided wave radar setup, calibration, and diagnostics. To continue on this theme, I’ve discovered an article, Determining the level best...
19 Apr 2011
Tank Gauging Blog:
Radar Level Measurement Beginnings, Types, and Applications
Jim Cahill
One of my U.K.-based colleagues pointed a great article my way, Defining and refining process radar level, in the November Control Engineering Europe magazine. Unfortunately, the article is not viewable online unless you subscribe to site–so I don’t have a link for it. The article shares the history...
11 Jan 2011
Analytical Experts Blog:
Metals Extraction and Processing Liquid Analysis
Jim Cahill
My trusty Emerson RSS feed alerted me to a new liquid analysis application guide for the metals extraction and processing industry. This guide, published by Emerson’s Rosemount Analytical Liquid business, covers the liquid analysis solutions for the following processes: leaching and ore extraction, concentration and separation, finished product purification and waste disposal. I confess to knowing little about mining…
7 Jul 2008
Analytical Experts Blog:
Metals Extraction and Processing Liquid Analysis
Jim Cahill
My trusty Emerson RSS feed alerted me to a new liquid analysis application guide for the metals extraction and processing industry. This guide, published by Emerson’s Rosemount Analytical Liquid business, covers the liquid analysis solutions for the following processes: leaching and ore extraction, concentration and separation, finished product purification and waste disposal. I confess to knowing little about mining…
7 Jul 2008
Analytical Experts Blog:
Metals Extraction and Processing Liquid Analysis
Jim Cahill
My trusty Emerson RSS feed alerted me to a new liquid analysis application guide for the metals extraction and processing industry. This guide, published by Emerson’s Rosemount Analytical Liquid business, covers the liquid analysis solutions for the following processes: leaching and ore extraction, concentration and separation, finished product purification and waste disposal. I confess to knowing little about mining…
7 Jul 2008
Analytical Experts Blog:
Metals Extraction and Processing Liquid Analysis
Jim Cahill
My trusty Emerson RSS feed alerted me to a new liquid analysis application guide for the metals extraction and processing industry. This guide, published by Emerson’s Rosemount Analytical Liquid business, covers the liquid analysis solutions for the following processes: leaching and ore extraction, concentration and separation, finished product purification and waste disposal. I confess to knowing little about mining…
7 Jul 2008
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