As a core component of industrial automation control, the HG-S3 pressure transmitter relies on the correct installation and commissioning of its diffused silicon sensor, which directly affects measurement accuracy. Focusing on the core needs of technical evaluation personnel, this article provides a detailed analysis of 5 key operating steps for PT124B-210, DG1300, and other series products, helping you quickly master the key points of on-site application for models such as VEGABAR-GV3.

1. Working Principle and Selection Points of Diffused Silicon Pressure Sensors

Diffused silicon pressure sensors measure pressure through the semiconductor piezoresistive effect, with the core being a Wheatstone bridge formed by diffusion on a silicon diaphragm. When medium pressure acts on the diaphragm, the resistance value changes, causing the bridge output signal to change. Taking the PT124B-210 series as an example, it uses an M14 threaded interface, with a measuring range covering 0-25MPa, making it suitable for most industrial scenarios.

Key selection parameters:

• Medium compatibility: The DG1300-BZ series uses a 316L stainless steel isolation diaphragm and can measure corrosive liquids/gases
• Accuracy class: VEGABAR-GV3 reaches 0.2%FS, better than the industry standard
• Process connection: Select interface forms such as G1/4, NPT1/4 according to pipeline size

2. Environmental Assessment and Preparation Before Installation

Before installing models such as SY-PG1300-1.6MPa-GB, a systematic inspection is required:

Special reminder: When installing the PT-PT300 series, keep the process connection axis consistent with the direction of gravity to avoid lateral stress affecting measurement accuracy.

3. Pressure Port Installation and Sealing Treatment

1.Threaded connection specification: For the PT124B-210-100MPa-G1/4 model, the installation torque should be controlled at 15-20N·m, as excessive tightening may cause diaphragm deformation

2.Selection of sealing materials:

• ≤10MPa working conditions: PTFE sealing tape is recommended
• High-pressure working conditions: Use metal sealing gaskets (such as the standard copper gasket for P200S-GB10CG12M4S)

3. Post-installation inspection: Use a helium mass spectrometer for airtightness testing, and the leakage rate should be ＜1×10^-6 mbar·L/s

4. Electrical Connection and Signal Commissioning

1.Wiring method: HG-S3 provides 4-20mA two-wire output, and the wiring terminals must comply with the IEC 60947 standard

2.Zero-point calibration: Under no-load conditions, adjust the zero-point output of DG1300-BZ-A-2-0.1 (corresponding to 4mA) through the HART protocol

3.Range verification: Use a pressure calibrator to apply full-scale pressure (such as the 25MPa point of PT124B-210-25MPa-M14), and confirm that the 20mA output deviation is ≤±0.5%

5. On-Site Fault Diagnosis and Maintenance

Common problem handling:

• Signal drift: Check whether there is leakage at the process connection (a common issue in the DG1300-BZ-B-2 series)
• Abnormal output: Measure whether the power supply voltage is stable (18-36VDC)
• Slow response: Clean impurities from the pressure guide hole (especially suitable for viscous medium measurement)

It is recommended to carry out preventive maintenance every 6 months, including:

1. Mechanical connection tightening inspection
2. Electrical insulation test (≥100MΩ)
3. Zero point/full scale recheck

6. Industry Application Cases and Selection Recommendations

In the petrochemical field, the VEGABAR-GV3 pressure transmitter has been successfully applied to pressure monitoring of hydrogenation reactors, and its features include:

• Certified for SIL2 functional safety
• Still maintains 0.5% accuracy at a 100MPa range
• Standard Ex d IIC T6 explosion-proof housing

Selection decision tree:

• Corrosive media → Select PT124B-210-NPT1/4 with a Hastelloy diaphragm
• Food and pharmaceutical industry → Choose the SY-PG1300 series with hygienic connection
• High-frequency pulsating pressure → Configure P200S-GB10CG12M4S with liquid filling

Summary and Technical Support

Correct installation and commissioning are key to ensuring the long-term stable operation of diffused silicon pressure sensors. As a professional pressure transmitter manufacturer, Xi'an Shenghongchuang Instrument Co., Ltd. provides technical consultation and on-site support services for the full range of products from PT124B to DG1300. Our engineering team has more than 10 years of industry experience and can provide you with:

• Customized selection solutions
• Installation and commissioning guidance
• Regular calibration services

Contact our technical consultants now: Call 029-XXXXXXX to obtain the complete technical manual for the HG-S3 pressure transmitter, or visit the official website to view detailed parameters and certification documents for products such as PT-PT300.