VeriCal in situ calibration verification system

The VeriCal in situ calibration verification system for gas and flare flow-meters enables technicians to confirm flow measurement accuracy in minutes — saving time and reducing operating costs. The system allows for the verification of flowmeter calibration without removing the meter from the pipe or process. It is suitable for flare gas applications in offshore oil and gas production and refining, as well as other applications where periodic validation of flowmeter calibration is required by the process or environmental regulations. The system combines a specially manufactured and plumbed air/gas flow element with electronics that feed and measure a precise flow of gas from a nitrogen source. During flowmeter testing, the nitrogen is fed through the meter’s flow element and measured against five benchmark measurement points across the meter’s range. The in situ flowmeter test data are then compared to original laboratory calibration and installation benchmark test data for the meter. The verification also provides a secondary benefit of cleaning the flow element sensors, which helps ensure performance and reduces the need for routine maintenance.