Analysis of the Causes of Abnormal Display in Diffused Silicon Hirstman Pressure Sensors

When the AO-X pressure transmitter displays abnormally, it is first necessary to understand the working principle of the diffused silicon Hirstman sensor. This type of sensor uses semiconductor strain gauge technology to generate resistance changes through the deformation of the silicon diaphragm, which is then converted into an electrical signal output. Common display abnormalities include zero drift, unstable output signals, no signal output, and other phenomena, which are often related to the installation environment, medium characteristics, or electrical connections.

For pressure transmitter models such as PTS-PTS501 and ZFBY-ZFBY3801, abnormal display may be caused by the following reasons:

• Electrical interference: Strong electromagnetic fields nearby may cause signal distortion
• Wiring errors: If the wiring diagram of the BP-IE pressure transmitter is not followed correctly, signal transmission interruption may occur
• Medium compatibility: Chemical compatibility issues between the measured medium and 316 stainless steel/304 stainless steel
• Overload pressure: Exceeding 2 times the full-scale measuring range of the BP-IB pressure transmitter

Typical fault phenomena and corresponding solutions

Systematic troubleshooting process

For pressure transmitter models such as TMS-QY110 and TMS-GH186, it is recommended to carry out systematic troubleshooting according to the following steps:

1. Power supply check: Confirm that the supply voltage is within the range of 24±5VDC (three-wire system)
2. Mechanical inspection: Check whether there is leakage at threaded ports such as M20×1.5
3. Environment verification: Ensure that the operating temperature is within the range of -20～+85℃
4. Signal test: Use a multimeter to check whether the 4～20mADC output is normal

Accuracy maintenance and calibration points

For high-precision applications where the YH-A pressure transmitter accuracy class is 0.25, special attention should be paid to:

• Regularly perform zero/full-scale adjustment (±8% output range adjustment range)
• The temperature compensation range should be controlled between 0～70℃
• It is recommended to conduct a stability test once every six months, and the typical value should be ≤±0.1%FS/year

Alternative solutions and product recommendations

When the original model sensor cannot be repaired, you may consider using the domestic general-purpose pressure transmitter YSJ-B2 compact liquid and gas pressure sensor as an alternative solution. This product has the following advantages:

• Multiple range options (0～0.01MPa to 0～250MPa)
• High-stability design (±0.05%FS/℃ temperature drift)
• Compatible with various application scenarios such as hydraulic, pneumatic, and petrochemical

Professional maintenance recommendations and summary

To ensure the long-term stable operation of equipment such as the BP-IN pressure transmitter, it is recommended to:

• Establish a regular calibration system (refer to GB/T 15478-2015 standard)
• Keep complete equipment operation logs (including temperature and pressure fluctuation records)
• Select products with IP65 protection rating to cope with harsh environments

Through the above systematic troubleshooting methods, more than 90% of abnormal display problems in diffused silicon Hirstman sensors can be resolved. If you need more technical parameters or customized solutions for the YSJ-B2 pressure transmitter, please feel free to contact our professional technical team.