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Avoid False Readings When Vacuum Sensors Fail

Posted by Tim Collins on Sep 11, 2015 11:12:04 AM

  Ever feel like this guy? Damage to sensors and units alike is an inevitable facet of field work that can put undue stress on even a well-prepared crew, especially when time is of the essence. Vacuum sensors are calibrated in air. However, sensor contamination can occur easily in real-world applications leading to failure or false readings. Having multiple back-up vacuum sensors on hand that have already been factory calibrated to your specific vacuum gauge can save time, stress, and avoid the risk of inaccurate readings. Read on!
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Topics: Manufacturing, Calibration, Accuracy, Oil and Gas, Contamination, Transformers

Accuracy of Thermocouple Tubes Without Calibration

Posted by Tim Collins on Mar 12, 2015 12:55:00 PM

Unexpected sensor failures, breakage and contamination happens to all of us. Hopefully you have a spare on hand when a sensor breaks in the field. You quickly switch out your vacuum tubes and proceed without hesitation. Unfortunately it's rarely that easy - there are small electrical differences between each sensor; thus, your backup sensors will produce different readings on different vacuum gauges without calibration.   Unfortunately, factory recalibration isn't always an option at the time. This should raise some logical questions with technicians; how reliable and accurate are the readings produced by backup vacuum tubes? We set out to answer this question by performing an experiment in the DigiVac shop. 
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Topics: Calibration, Accuracy, Researcher topics, Contamination

Moisture in Oil Transformer Tanks: Avoiding Mechanical Breakdowns

Posted by Tim Collins on Nov 19, 2014 5:00:00 PM

Remember the ol' transformer oil purification experiment from applied chemistry class? Thinking of it as you learn about moisture and oil contamination can be very useful. Internal moisture in transformer oil tanks is not distributed uniformly, and can be concentrated in the most dangerous
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Topics: Oil and Gas, Contamination

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