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Title: USING CONTROL CHARTS TO PREDICT FAILURES OF MEASUREMENT DEVICES
Author: ZAKI HUSAIN
Source: 2018 International School of Hydrocarbon Measurement
Year Published: 2018
Abstract: Control Chart of a monitoring device is historical documentation of the performance of the device. For flowmeters, Control Chart is the Meter Factor (MF) of the flowmeter plotted or tabulated as a function of time. Figure 1 is an example of control chart of a flowmeter that was installed to monitor flowrate for a process control application, where flowing fluid did not change, but the flowrate and temperature of the fluid may have changed when the flowmeter was calibrated each week. The flowrate during proving of the meter varied over the range of 62 to 85 percent of the maximum flow rate range of the meter, while the fluid temperature varied between 55 and 83 degrees Fahrenheit. The desired measurement uncertainty for the process control was +/-0.05%. The baseline calibration of the flowmeter indicated that the meter performance was acceptable for the application.

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