Guide to Diagnosing 5 Common Faults of Diffused Silicon Hysteresis Pressure Transmitters

Are frequent faults with the BP-IN pressure transmitter disrupting production? As a core user of diffused silicon Hysteresis sensors, do you often encounter typical issues such as signal drift, zero-point anomalies, and overload damage? Xi'an Shenghongchuang Instrumentation's expert team has summarized 5 high-frequency fault handling solutions for models such as PTS501 and TMS-QY110, covering everything from sensor calibration to wiring diagram troubleshooting, helping you quickly restore equipment accuracy and stability.

1. Handling Signal Drift and Zero-Point Anomalies

When the BP-IB pressure transmitter shows continuous deviation in measured values, first check whether the ambient temperature exceeds the compensation range (-10℃~55℃). The typical value of sensitivity temperature drift for diffused silicon sensors is 0.02%FS/℃, which may lead to an error of 0.25%FS under extreme conditions. According to the TMS-QY110 pressure transmitter manual, the following three-step troubleshooting method can be used:

• Use a standard pressure source for zero-point calibration, taking care to eliminate the influence of trapped air in the pipeline
• Check the stability of the power supply voltage; fluctuations of the 24VDC power supply must be controlled within ±5%
• Perform periodic calibration on the BP-IF model; it is recommended to conduct a full-scale test once every six months

Similar issues are also applicable to the domestic differential pressure transmitter FY-KFB air pressure sensor, whose German core components can effectively reduce temperature drift to 0.02%FS/℃.

2. Response Plan for Overload Protection Failure

When the BP-IN model encounters a pressure shock of 2 times the full scale, it should be handled according to the following process:

1. Immediately cut off the power, remove the process connection pipe, and inspect the diaphragm condition
2. Use a multimeter to measure the output terminal resistance; the normal value should be 100MΩ(500V DC)
3. Refer to the BP-IE pressure transmitter wiring diagram to check the current-limiting protection circuit

Special note: In the specifications and models of diffused silicon Hysteresis pressure sensors, industrial-grade products such as TMS-GH186 allow overpressure up to 3 times the range, but continuous overload will still cause failure of the stress isolation layer.

3. Diagnostic Process for Output Signal Anomalies

4. Troubleshooting Medium Compatibility Faults

For abnormal display issues of the AO-X pressure transmitter, it is necessary to confirm whether the measured medium meets the requirements:

• Corrosive media can cause perforation of the 304 stainless steel diaphragm
• Dust accumulation will affect the sealing performance of the Φ8 nozzle with M10x1 mounting thread
• If the medium temperature exceeds 85℃, the high-temperature YH-A series should be selected

For special working conditions, a customized model of the gas micro differential pressure transmitter can be selected, and its hard aluminum alloy surface spray coating treatment enables it to adapt to more complex environments.

5. Key Points for Long-Term Stability Maintenance

According to the different measurement ranges of the BP-IN pressure transmitter, it is recommended to adopt differentiated maintenance strategies:

1. Low pressure range (0-500Pa): Check the airtightness of the process connection every month
2. Medium pressure range (1-100KPa): Calibrate zero-point temperature drift every quarter
3. High pressure range（＞100KPa）: Replace the O-ring seal annually

Professional Maintenance Ensures Long-Term Equipment Operation

Xi'an Shenghongchuang Instrumentation Co., Ltd. recommends that for key equipment such as ZFBY3801, complete maintenance records should be established to document each calibration data set. When encountering complex faults that cannot be resolved through the BP-IE pressure transmitter wiring diagram, you can contact our technical team for professional support for Exia II CT5 explosion-proof certified products. Consult solutions now to obtain customized maintenance plans.