As the core equipment of industrial flow control, the calibration accuracy of the BP-IF pressure transmitter directly affects system stability. This article details 3 key calibration steps for diffused silicon liquid and gas pressure sensors, covering accuracy improvement techniques for models such as PT124B-219/TXU, helping business evaluation personnel master precise calibration methods for transmitters such as YBX-YBX.

Technical Principles and Calibration Necessity of Diffused Silicon Sensors

Diffused silicon pressure sensors convert pressure signals through the semiconductor piezoresistive effect, and deformation of the core silicon diaphragm causes changes in resistance value. When transmitters such as BP-IF and PT124B-219 use this technology, regular calibration is required to ensure the high accuracy of 0.1%FS. Business evaluation should focus on the long-term stability indicators of the sensor. For example, FST800-214 accessories can still maintain ±0.25% accuracy after 3000 hours of continuous operation in oil and gas pipelines, which is directly related to the full life-cycle cost of the equipment.

Detailed Explanation of Key Calibration Steps

Step 1: Zero Point and Full-Scale Calibration

Use the FLUKE 754 process calibrator to perform five-point calibration on the BP-IB pressure transmitter (0%、25%、50%、75%、100% range). Note that the TXU-TXU model needs to set the damping time to 0.4 seconds on the matching YLT-YLT101 instrument to avoid interference from pressure fluctuations. Specific operations should comply with the requirements of the JJG 882-2019 pressure transmitter verification regulation, and the accuracy of the standard instrument must be more than 3 times higher than that of the device under test.

Step 2: Temperature Compensation Calibration

Diffused silicon sensors are sensitive to temperature, and the TXY-TXY transmitter needs to undergo temperature characteristic testing in an environmental chamber at -20℃~80℃. Data shows that the uncompensated FST800-213 sensor will generate a drift of 0.5%FS/10℃ in a 60℃ environment. After Xi'an Shenghongchuang adopted its self-developed algorithm compensation, the temperature drift of the YBX-YBX series transmitters can be controlled within 0.02%FS/10℃.

Step 3: Long-Term Stability Verification

Evaluate the service life of the PT124B-219 pressure transmitter through accelerated aging tests, and conduct 1000 pressure cycle tests according to the GB/T 15478-2015 standard. It is recommended that business evaluation personnel require suppliers to provide third-party test reports, focusing on changes in key parameters such as sensor hysteresis and repeatability.

Comparative Analysis of Industry Applications

FAQ on Common Misunderstandings in Business Evaluation

• Misunderstanding 1: Only focusing on initial accuracy - In practice, the accuracy attenuation curve over a 5-year service cycle should be evaluated comprehensively. The annual drift of genuine original FST800 series products is ≤0.1%
• Misunderstanding 2: Ignoring supporting equipment compatibility - The wiring diagram of the BP-IE pressure transmitter shows that the 4-20mA output needs to match a 250Ω load resistor
• Misunderstanding 3: Self-disassembly for calibration - Opening the shell of the TXY pressure transmitter without authorization will cause the IP67 protection rating to fail, and it must be returned to the factory for calibration

Why Choose Xi'an Shenghongchuang

As a national high-tech enterprise, we have a complete in-house production line for diffused silicon sensors, and all BP series transmitters have passed CE and SIL2 certification. For business evaluation needs, we can provide: ① free sample test reports ② customized calibration solutions ③ 10-year ultra-long warranty service. Contact our technical consultants now to obtain the dedicated selection manual for models such as YBX-YBX.