As the core component of flow control equipment, the accuracy of the YM-QP pressure transmitter directly affects system performance. This article will provide an in-depth analysis of the calibration technology of diffused silicon liquid and gas pressure sensors, helping contract executors master the key methods for improving measurement accuracy by 30%, covering the calibration points and selection guide for mainstream models such as KS-E-E-C-B04C-M-V.

I. Working Principle and Factors Affecting Accuracy of Diffused Silicon Pressure Sensors

As the core component of the YM-QP pressure transmitter, the working principle of the diffused silicon pressure sensor is based on the piezoresistive effect. When external pressure acts on the silicon diaphragm, the diaphragm deforms, causing the resistance value of the embedded Wheatstone bridge to change, thereby outputting an electrical signal proportional to the pressure. Models such as KE-240-400BG5M all use this principle to achieve high-accuracy measurement.

The three key factors affecting accuracy include:

• Temperature drift: Changes in ambient temperature cause zero output and sensitivity drift
• Nonlinearity error: Nonlinear relationship between sensor output and pressure input
• Long-term stability: Performance degradation caused by material aging

Taking the KS-E-E-Z-B01C-M-V model as an example, the initial accuracy without calibration is usually ±0.5%FS, and it can be improved to below ±0.35%FS through professional calibration.

II. Detailed Explanation of the YM-QP Pressure Transmitter Calibration Process

1. Preparation Before Calibration

Before calibrating pressure transmitters of the YM-JGSYY series, it is necessary to ensure:

2. Operating Steps of the Five-Point Calibration Method

1. Zero-point calibration: Adjust the zero output to 4mA under no-pressure conditions (current output type)
2. Full-scale calibration: Apply 100% range pressure and adjust the full-scale output to 20mA
3. Intermediate point verification: Measure the output error at 25%, 50%, and 75% range points respectively
4. Temperature compensation: Perform compensation calibration at two temperature points of -10℃ and 50℃
5. Repeatability test: Conduct at least 3 pressure cycle verifications

For special models such as 40.4366/000-999-405-502-20-61, an additional medium compatibility testing step is required.

III. Comparison of Calibration Points for Mainstream Models

Different models of diffused silicon pressure sensors have differentiated calibration requirements:

IV. Pressure Transmitter Selection Guide

The following factors should be considered when selecting a suitable diffused silicon pressure sensor:

• Measured medium: For corrosive media, choose stainless steel isolated models such as KS-E-E-C-B02C-M-V
• Accuracy class: Grade 0.2 is recommended for process control, and grade 0.1 is required for testing instruments
• Output signal: Compatibility of different interfaces such as 4-20mA/RS485
• Environmental adaptability: Special requirements such as explosion-proof and waterproof

For customized requirements, special designs can be based on the technical parameters of the 40.4366/000-999-405-502-20-61 model.

V. Performance Verification and Maintenance After Calibration

The calibrated YM-QP pressure transmitter needs to undergo:

1. 48-hour aging test
2. Vibration and shock test (refer to IEC 60068-2 standard)
3. Zero drift check after on-site installation

It is recommended to carry out periodic calibration every 12 months, using reference standards such as KE-240-400BG5M for verification.

Summary and Professional Recommendations

Through a scientific calibration process, the YM-QP series pressure transmitters of Xi'an Shenghongchuang Instrument Co., Ltd. can achieve a measurement accuracy improvement of more than 30%. For commonly used models such as KS-E-E-Z-B01C-M-V, it is recommended to:

• Establish standardized calibration work instructions
• Adopt an automatic calibration system with temperature compensation
• Maintain complete calibration data records

As a professional supplier of flow control equipment, we provide full-process technical support from KS-E-E-C-B04C-M-V calibration to YM-DJYJ selection. Contact our engineering team now to obtain customized pressure measurement solutions.