Wednesday 23/7/2014

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06/08/2013 - Why Use an AC-Operated vs. DC-Operated LVDT Linear Position Sensor?
When initially introduced fifty years ago, all LVDT linear position sensors were AC-operated and required external oscillators, carrier amplifiers, demodulators and filers to operate. 
 
01/08/2013 - Common sense
Vibration sensing has become an increasingly common tool in the process industries, enabling engineers to detect exactly which components are due to fail and when, and thus facilitating the efficient replacement of parts. Chris Hansford, Managing Director of Hansford Sensors, explains how the use of vibration monitoring solutions keeps production lines running smoothly in a range of applications.
 
29/07/2013 - Why choose Absolute over Incremental Position Sensors?
For position sensing applications, many engineers are still specifying incremental sensors because they believe absolute versions are too complex and/or costly. Darran Kreit, Technical Manager at Zettlex, describes the two approaches and compares the relative benefits of each.
 
17/07/2013 - HOW TO SELECT THE BEST COUPLING FOR …
True angular misalignment

The common causes of true angular misalignment are when one of the connected shafts is compliantly mounted; for example, when it is located by a self-aligning bearing.
 
16/07/2013 - Less is More : Why You Should Pump Slurries with a Peristaltic Pump
• LESS WATER
Peristaltic Pumps Use Less Water

Hose pumps can circulate slurry SGs of 1.6 to 1.8 or up to 80% solid content. The traditional centrifugal pump loses efficiency when the slurry SG reaches 1.3 or 30% solids. With this limitation, slurry pumps have significant process water demands : on a plant processing 75 tonnes of ore per hour and at 65% solids, every time a hose pump replaces a process slurry pump, it saves over 1,100 Million litres of water annually because of the slurry pump’s inefficiency : on the same duty, the hose pump requires less than 25% of the process water of a slurry pump
 
11/07/2013 - A BETTER WAY TO MEASURE TORQUE
Measuring torque accurately, particularly in rotating shafts, can often be challenging, but new technology is providing a better solution, says Mark Ingham of Sensor Technology.
 
08/07/2013 - Direct versus Indirect measurement of shaft angle
As a rule, it’s preferable to measure directly the position or speed of the object that you are interested in. In many cases, practical problems of physical environment or limited space mean that this can be a challenge, particularly when measuring the angle of shafts with a diameter greater than a couple of inches. The traditional approach is to measure angular position or speed indirectly – typically inferring the shaft’s position from measurements made elsewhere. Mark Howard of Zettlex Ltd describes the traditional approach and a new, direct approach enabled by inductive sensors.
 
01/07/2013 - Non-Destructive Testing - how far should you go?
Every day millions of components are produced around the world to help build everything from a simple toy to fighter jets. For every manufacturer involved in the process, a decision must be made on how to test the component to ensure it meets the design criteria. For the vast majority, batch inspection and testing is sufficient, however, where high precision engineering is involved the testing must be exhaustive and comprehensive. Components for aerospace, motorsport, medical devices and other ultra critical areas are required to be tested to an extremely high standard.
 
24/06/2013 - Valves – when to repair or replace?
When it comes to process, pilot and actuation valves, the question of whether it is advisable to repair or replace a worn or intermittent unit is worth considering, regardless of the type or the size.
 
18/06/2013 - Applying Offline Tools To Reduce On-Site Control Implementation Effort
Productivity tools and work process changes to expedite advanced control projects

Ken Allsford, Bhaskar Iyer and Aric Tomlins, Honeywell Process Solutions

The Practitioner’s Challenge

Process control engineers are always challenged to be more effective to successfully commission new advanced regulatory control strategies and multivariable control applications. To address the challenge, the practitioner needs to continuously improve and apply understanding of both control technology in general and the process technology specifics relevant to each control project. This article discusses some of the newer productivity tools and work process approaches that are now becoming more widely deployed.
 
 
  
 
    
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