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To achieve the highest accuracy in sensors, calibration is a critical element. Calibration of a quartz transducer can stay valid for years, allowing downhole tools to spend less time being serviced and more time providing value in the field. When developing a re-calibration protocol, the best approach is to re-calibrate only the pressure transducers that demonstrate need for it. See our tech note for more details.
Quartzdyne Calibration information
• Pressure is generated with precision automatic and manual dead weight testers with 0.01% of reading accuracy.
• Sensor hysteresis is assessed by stepping up to full scale and then stepping down to ambient.
• Pressure drift is analyzed by full scale soaking both before and after calibration.
• All downhole pressure transducers are calibrated in stirred oil baths that are stable and uniform to 0.01 °C.
• Each pressure step causes PV heating or cooling, which us to wait for the event to decay before readings are made.
• Sub-sea and surface units are calibrated in refrigerated ovens.