Azcar Technologies focuses in the field of Measurement, Automation and Digitalization, which are our long-term growth fields. We offer energy-efficient, resource-saving technologies to businesses in the regions.
When designing a measurement station it is important to understand the product to be measured, apply the correct equipment, and implement the appropriate correction calculations or factors. The following considerations need to be addressed to minimize measurement uncertainty:
What is the composition or fluid to be measured?
What is the minimum, maximum and normal operating conditions?
How does the operating pressure and temperature affect the fluid?
What other operational factors affect proper measurement?
Based on the answers to the previous questions, what is the best measuring device to handle the product?
What types of calculations will be implemented to correct the parameters measured at process conditions to the ‘standard conditions’?
How will accurate calibration or verification data be generated from the primary measuring device?
The selection of the meter device depends upon the process conditions, the intended rangeability of the system and the fluid properties. For optimum performance, the meter must be capable of covering a wide measurement range and maintain the required linearity. A typical list of selection factors include the following:
Is the measurement of liquid, gas, or vapor? Are there mixtures, or are they in combination with solids?
Is the fluid corrosive, passive, clean, or dirty?
What are the operating temperatures and pressures?
For intrusive devices, what pressure drop is permissible?
What accuracy is needed?
What signal and display are required?
What is the total cost of ownership?
What maintenance is required and who has to do it?
Attention to installation detail, piping requirements, and maintenance are critical to instrument performance and to achieving accurate measurement. Most properly installed meters require minimal maintenance. A few however may require routine service. The frequency of routine maintenance varies with process fluid, type of meter and nature of the upset condition. Meters are also subject to measurement errors associated with the effects of the installation configuration when the circumstances of the field installation differ significantly from those of the baseline calibration. Installation errors are bias errors, not random errors. For this reason, special attention should be paid to minimizing measurement errors caused by installation effects.
Smart measurement devices with predictive intelligence deliver advanced diagnostic information from the field, report current device health and in turn reduce measurement uncertainty and streamline maintenance efforts. A prescribed meter re-calibration scheme does not always ensure accurate measurement. Using real-time advanced diagnostics to monitor the meter’s performance is the right way to ensure proper and accurate operation. Advanced performance diagnostics ensure the dynamics of the metering system remain within control limits.