Analysis of Common Faults in Diffused Silicon Hirschmann Pressure Sensors

As core equipment in the field of pressure measurement, the diffused silicon Hirschmann sensor used in the YB-YB3011 pressure transmitter often encounters 5 typical faults such as zero drift and abnormal signals. This article provides standardized solutions for common industrial field problems such as inaccurate measurement and unstable output, helping operators quickly diagnose faults in diffused silicon Hirschmann pressure sensors and ensure the precise operation of transmitters in the PT-PT202 and CS-PT300 series.

In industrial process control, diffused silicon Hirschmann pressure sensors are widely used for their high accuracy and good stability. However, during actual use, various fault issues often occur due to environmental factors, improper installation, or equipment aging. This article will analyze in detail the 5 common fault phenomena of the YB-YB3011 pressure transmitter and their solutions, helping operators quickly troubleshoot problems.

1. Diagnosis and Handling of Zero Drift Faults

Zero drift is one of the most common faults in diffused silicon Hirschmann pressure sensors, mainly manifested as the output signal deviating from 4mA (zero value) under no-pressure conditions. This phenomenon may occur in equipment such as PT-PT202 pressure transmitters and CS-PT300 pressure transmitters.

The main causes of zero drift include:

• Temperature changes cause internal stress changes in the sensor
• Long-term overload use causes fatigue of elastic elements
• Medium crystallization or contaminant deposits accumulate on the sensing diaphragm
• Electrical interference affects signal transmission

Solution: First disconnect the pressure connection and ensure the sensor is in a no-pressure state. Use a standard resistance box or signal generator to simulate a 4mA signal and check whether the system display is zero. If there is any deviation, calibration can be performed through the zero adjustment screw (usually located on the side of the transmitter). For high-precision devices such as Domestic Industrial 2088 Pressure Transmitter YHT5 Industrial Explosion-proof Diffused Silicon Pressure Sensor, regular zero calibration is recommended to ensure measurement accuracy.

2. Troubleshooting Unstable Output Signals

Output signal fluctuation is another common fault of the YB-YB3011 pressure transmitter, especially under working conditions such as hydraulic and pneumatic control systems. This phenomenon will directly affect the control accuracy of equipment such as the TY-804 pressure transmitter.

Possible causes include:

1. Unstable power supply voltage (outside the 9～36VDC range)
2. Poor grounding causes signal interference
3. Damage to the cable shielding layer
4. Excessive medium pressure pulsation
5. Aging of internal sensor components

Solution: First check whether the power supply is stable and whether the actual voltage is within the allowable range. Then check whether the wiring terminals are secure, especially the grounding condition of the shielded wire. For devices such as the SWT-SWT131 pressure transmitter, it is recommended to use shielded cables with magnetic rings, which can effectively suppress high-frequency interference. In addition, installing a pulsation damper at the pressure port can also significantly improve signal stability.

3. Range Error Adjustment Method

Range error refers to the deviation between the output of the pressure transmitter at the full-scale point and the standard value (usually 20mA). The accuracy class of devices such as the JPB-JPB2300 pressure transmitter will directly affect the magnitude of the range error.

Adjustment steps:

First apply full-scale pressure (be careful not to exceed the overload pressure limit), and observe the output current after the pressure stabilizes. If the output is not at 20mA, it can be adjusted through the range adjustment potentiometer. For high-precision devices such as the CYB-28 pressure transmitter, it is recommended to use a standard pressure source for calibration to ensure accurate output within the temperature compensation range (0～70℃).

4. Handling Sensor No-output Faults

When equipment such as the TS-802 pressure transmitter has no output signal at all, the following aspects need to be systematically checked:

For sensors such as the MT-A pressure transmitter that use diffused silicon technology, it is also necessary to check whether the sensing diaphragm has been damaged by overpressure. Although the 316 stainless steel housing has excellent corrosion resistance, it is still necessary to avoid blockage caused by medium crystallization or impurity accumulation.

5. Temperature Effects and Compensation Measures

Temperature change is an important factor affecting the accuracy of equipment such as the PT-A pressure transmitter. Temperature drift may lead to an error of ≤±0.05％FS/℃, especially under working conditions with large temperature differences such as petrochemical plants and power stations.

Countermeasures:

• Select transmitters with temperature compensation functions, such as 2088 series products
• Add thermal insulation measures in environments with drastic temperature changes
• Regularly conduct temperature characteristic tests and establish compensation curves
• Avoid installing the transmitter near heat sources

Pressure Transmitter Maintenance and Optimization Recommendations

To ensure the long-term stable operation of equipment such as the YB-YB3011 pressure transmitter, in addition to promptly handling the above faults, a sound maintenance system should also be established:

Regular inspection items should include: electrical connection status, housing sealing performance, and leakage at the pressure interface. For measurement at critical process points, it is recommended to configure backup sensors. Choosing products such as Domestic Industrial 2088 Pressure Transmitter YHT5 Industrial Explosion-proof Diffused Silicon Pressure Sensor with high stability (±0.1％FS/year) can greatly reduce the failure rate.

As a professional pressure sensor manufacturer, Xi'an Shenghongchuang Instrumentation Co., Ltd. provides a full range of diffused silicon Hirschmann pressure transmitters from PT-PT202 to CS-PT300, with products widely used in industrial process testing and control, laboratory pressure calibration, and other fields. If you would like to learn more technical details or obtain professional solutions, please feel free to contact our technical team.