Measurement Validation is the next step in making reliable process measurements. By continuously monitoring temperature deviations, problems like failing RTDs, corroded terminals and excessive vibration can be detected. You now have the ability to know not only your process temperature, but that it is […]
Using instruments with Advanced Diagnostics is one of the three main strategies I commonly present to achieve process control and instrumentation reliability. There is a lot of diagnostic information available about your process that is not currently being captured. Accessing it allows you to fully develop a Predictive Maintenance (PdM) program for your process. […]
Reliability in a process plant commonly focuses on rotating equipment rather than fixed equipment. Through vibration monitoring and lube oil analysis a predictive maintenance program is realized. However, there is quite a bit of fixedequipment, like a heat exchanger, […]
High density temperature transmitters have many applications in process plants. These are commonly found on distillation columns to monitor the temperature profile. The advantage is that multiple temperature measurements can be achieved through one transmitter. Rather than running a RTD wire from a process to a marshaling cabinet, […]
The first wake frequency calculation standard was published by AMSE is 1974 and was based on a paper written by J.W. Murdock in the 1950s. This is the ASME PTC 19.3-1974 standard. However, it did not account for all installations. The Monju Fast Breeder reactor was shut down due to a leak in a liquid […]
Within a process plant there is all kinds of turbomachinery, including compressors, pumps and fans. They are generally steam driven and move a lot of fluid. They are large. They are expensive. The manufactures of turbomachinery will include basic controls to meet performance specification and safe operation. This presents a good opportunity to add […]
When a piece of process equipment rotates as part of its normal operation, it becomes challenging to obtain any type of measurement on the rotating part. Rotary calcination equipment, kilns and liquid filling machines can all benefit from process measurement. Electrical slip rings can be used, but with low energy instrumentation signals, these can be […]
In order to reduce installation and operational costs, process plants have ofter used RTDs or thermocouples without a transmitter for temperature measurement. This is especially true for high density temperature measurements like distillation columns, reactors and bearings on rotating equipment. However, there are a number of disadvantages to this strategy and high density temperature transmitters […]
Differential Pressure (DP) flow meters have long been the common method for measuring flow in a process. Any obstruction in a flow path creates a differential pressure which can be measured. Using the relationship of DP and flow a fairly accurate and reliable flow measurement can be realized.
With the advancement of measurement technology multi-varible […]
With 75% of process level being measured with differential pressure (DP) there are a lot of measurements that are not temperature compensated. Although the fluid made not change any temperature effects can alter the accuracy of the measurement significantly. This is especially true with outside storage tanks.
A really slick solution is to add a […]
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