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New At AVS: OptraVac | Highly Accurate Direct Vacuum Gauge

Posted by Tim Collins on Oct 22, 2015 10:00:00 AM

New At AVS 2015: DIGIVAC—wants your feedback on New Vacuum Technology coming to the market—a prototype is available for viewing and discussion at booth #622, October 18th-23rd, during AVS at the San Jose Convention Center. People working with high vacuum are met with 2 problems: 1. The vacuum region from 1x10-5 to 1x10-7 Torr requires devices that employ indirect measurement technology such as cold and hot cathode gauges with typical accuracies of +/-  30%, which is considered acceptable. An accuracy range of better than +/- 5% is considered almost unattainable with current measurement technologies  2. Many academic and industrial processes use a mixture of gasses other than Nitrogen, without establishing an appropriate correction factor, the accuracy of all indirect gauges is compromised Since most indirect measurement gauges are calibrated in Nitrogen, measuring pressures of different gases with different properties requires a correction factor. Gas correction factors are often based on a particular gas. Therefore, applying gas correction factors for a mixture of known or unknown gases becomes more challenging. This is especially true if the ratio of gasses changes throughout the process. If there was a solution to these problems, would you want to learn more? Please consider giving us your feedback on a new digital vacuum gauge that avoids these problems by completing a short survey.
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Topics: Manufacturing, Accuracy, Surface Treatment

DigiVac Launches Novel Vacuum Gauge For High Vacuum Region At AVS

Posted by Tim Collins on Oct 20, 2015 1:51:51 PM

DigiVac Exhibiting at the 62nd AVS International Symposium and Exhibition Booth 622 DIGIVAC— is excited to exhibit New Technology at AVS 2015—the 62nd International Symposium and Exhibition on October 18th-23rd at the San Jose Convention Center, in San Jose, California.  OptraVac |  Addresses the Need of High Accuracy By Direct Measurement in the High Vacuum Region (1x10-3 to 1x10-7 Torr).  OPTRAVAC is the only Isolated and Passive sensor technology on the market. Unlike any other medium and high vacuum measurement technology currently available, it is immune to electromotive pulse (EMP), electrical interference, and magnetic interference. Why is this important? You avoid sensor degradation and inaccurate readings.
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Topics: Manufacturing, Accuracy, Vacuum Analytics, Surface Treatment

PID for Vacuum System Automation

Posted by Tom Bassi on Dec 12, 2014 5:55:00 PM

PID is an acronym for using a closed loop feedback system with the terms Proportional, Integral and Derivative.  While it uses calculus-type words, it is straightforward to configure and is what many industrial processes rely on for predictable automation.  It works on the principal of minimizing the error between the current vacuum reading and the desired set point vacuum pressure.   While PID can work on any closed system, it is also very useful for vacuum systems.  The balancing act is tuning
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Topics: Vessel Downtime, Manufacturing, Calibration, Semiconductor, Surface Treatment, Food/Beverage

Flow Measurement & Vacuum Control in Plasma Treating Systems

Posted by Tim Collins on Nov 4, 2014 4:22:00 PM

INTRODUCTION: Plasma is an effective form of surface treatment. It is a crucial process step to ensure that surface contaminants don't prevent bonding.  For a low pressure plasma treatment process, maintaining a precise vacuum level can make plasma runs more repeatable by isolating the vacuum pressure variable.  PROBLEM: Some plasma treating systems do not have flow measurement and process control features, which are required for hitting a target vacuum level. Furthermore, as vacuum pumps age over time, their base pressure changes.  A changing base pressure and thus plasma pressure may cause inconsistent results.  How can you solve this problem without making an extremely costly upgrade to your system?
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Topics: Surface Treatment