Archive for the ‘Level’ Category

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 […]

Continuous Floating Roof Tank Condition Monitoring

Posted in Level, Tank Gauging on Tuesday, June 6th, 2017. One comment so far
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Floating roofs are used on storage tanks to minimize vapor space between the top of the tank and the level of the liquid, typically a petroleum-based product, inside the tank. Per the External floating roof tank Wikipedia entry: The roof rises and falls with the liquid level in the tank. As opposed to a fixed […]

Accurate Level Measurement for Efficient & Reliable Boiler Performance

Posted in Energy, Level on Thursday, June 1st, 2017. No comments yet
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If you’re unfamiliar with the phrase “heat rate” used in the electrical power generation industry, it means the amount of heat energy in BTUs as input to the turbine generators divided by the amount of electricity generated in kilowatts. Accurate level measurement in the boiler drums and feedwater heaters is critical to optimize efficiency and […]