Archive for the ‘Level’ Category

Selecting the Right DP Level Device for the Temperature Conditions

Posted in Level on Tuesday, September 12th, 2017. No comments yet
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With the season in change from summer to autumn here in the northern hemisphere, let’s look at differential pressure (DP) level measurement performance at various temperature ranges and particularly at cold weather performance. This quick 2:35 YouTube video, DP Level Solutions Optimized for Cold Climates: Improved Response Time, highlights the importance of selecting the right […]

Proof Testing Level Measurement Devices

Posted in Level, Safety on Tuesday, August 8th, 2017. No comments yet
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Safety instrumented systems (SIS) include the sensor(s), final control element(s) and logic solver(s) for each of the safety instrumented functions (SIFs) in the SIS. To verify the SIFs are performing the amount of risk reduction intended for their application, they must be periodically proof tested. PCN Europe magazine interviewed Emerson’s Teddy Tzegazeab on how proof […]

Level Sensor Safety Proof Testing

Posted in Level, Safety on Thursday, July 13th, 2017. No comments yet
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Backing up your computer or server is a waste of time if restoring the backup fails when you need it. Good practice is to test these backups on separate test systems periodically to make sure they restore properly. Similarly, safety instrumented systems (SISs) need to assure that each safety instrumented function (SIF)/safety loop does what […]

Remote Partial Proof Testing Level Sensors

Posted in Level, Safety on Friday, June 30th, 2017. No comments yet
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For safety instrumented functions (SIFs), proof testing is the process of identifying undetected dangerous failures in the sensor, final control element and logic solver which comprise the SIF. Dangerous failures are those that could put the safety instrumented system (SIS) in a hazardous or fail-to-function state. If undetected, in the case of level measurements, this […]

Using Flushing/Drip/Calibration Rings in Pressure and Level Measurements

Posted in Level, Pressure on Tuesday, June 27th, 2017. No comments yet
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If you work with pressure measurement instrumentation, you may have heard the phrases drip rings, flushing rings or calibration rings. These are used for pressure and differential pressure (DP) level measurement devices where diaphragm seals are used. I bring this up because I received an email recently that asked about these [edited and paraphrased to […]