Importance of Maintenance for Diffused Silicon Pressure Transmitters

As a core component of industrial flow control systems, the stable operation of the DBS316 pressure transmitter directly affects production efficiency. This article focuses on the maintenance needs of diffused silicon liquid and gas pressure sensors, and provides a detailed analysis of 3 key maintenance steps, covering maintenance points for special functions such as alarm control and remote signal transmission in KL316, PA1000 and other series products, helping operators effectively extend equipment service life.

In harsh industrial environments such as hydraulic control, petrochemical, and environmental protection, performance degradation of diffused silicon pressure transmitters often leads to increased measurement errors and may even trigger system failures. According to statistics from the Fluid Control Association, the failure rate of equipment receiving regular professional maintenance can be reduced by 62%, while products such as the Domestic General-purpose Pressure Transmitter YH701 Intelligent Negative Pressure Sensor made of 316 stainless steel can maintain stability for more than 10 years under standardized maintenance.

Three Main Causes of Performance Degradation

• Medium crystallization contamination: Impurities in the measured gas/liquid deposit on the sensor diaphragm
• Electrical aging: Long-term current fluctuations cause wear of components in the signal conversion module
• Mechanical stress fatigue: Pressure shocks cause micro-deformation in the diffused silicon chip structure

Key Maintenance Step 1: Periodic Cleaning and Inspection

For diffused silicon pressure transmitters such as DBS316 and TXY801, it is recommended to perform the following operations every 3 months:

1.1 Standard diaphragm cleaning procedure

1.2 Maintenance of special function components

For KL316 transmitters with alarm control:

• Use a multimeter to test the contact resistance of the switch output, which should be ≤0.5Ω
• When calibrating the alarm threshold, refer to the voltage compensation formula in the YB3101 installation instructions

Key Maintenance Step 2: Electrical System Diagnostics

Taking the PA1000 pressure transmitter as an example, the key maintenance points for its 4～20mA remote transmission signal are:

2.1 Signal stability test

1. Connect to a standard 24VDC power supply and measure the zero-point current under no-load condition (normal value 3.8-4.2mA)
2. Apply 50% full-scale pressure, and the output current deviation should not exceed ±0.1mA
3. Use an oscilloscope to capture signal ripple, and the peak-to-peak value should be ＜10mV

2.2 Temperature drift compensation

According to the AP131 calibration procedure, in a 0-70℃ environmental chamber:

• Record output value changes at every 10℃ interval
• If drift is ＞±0.05%FS/℃, the compensation coefficient must be rewritten

Key Maintenance Step 3: Mechanical Structure Maintenance

Special requirements for threaded installation models such as NPT100:

3.1 Stress relief operation

According to the torque standard in the XL802A customized solution:

• Recommended installation torque for G1/4 connection is 12-15N·m
• A pulse damper should be installed in pipeline vibration applications

3.2 Sealing performance verification

Use a helium mass spectrometer leak detector for testing:

• Allowable leakage rate: ＜1×10^-6 mbar·L/s
• For DT131 models used in vacuum applications, the inspection frequency should be doubled

Recommended Professional Maintenance Tools

To ensure the maintenance accuracy requirements in the TCT1202 manual, it is recommended to equip:

• Class 0.05 standard pressure source (covering a 250MPa range)
• Signal calibrator with temperature compensation function
• Dedicated 316 stainless steel thread repair kit

Summary and Action Recommendations

Through the above three-step maintenance method, the overall error of diffused silicon pressure transmitters such as DBS316 can be controlled within 0.25%FS, and the service life can be extended by 3-5 years. As a national high-tech enterprise, Xi'an Shenghongchuang Instrumentation Co., Ltd. adopts laser marking technology in its Domestic General-purpose Pressure Transmitter YH701 Intelligent Negative Pressure Sensor series products, providing traceable quality assurance. If you need maintenance parameter packages or professional guidance for various models, please contact our technical team immediately.