Introduction

As key equipment in the field of industrial automation, the correct installation of the PTB-PTB505 pressure transmitter and diffused silicon Hirschmann pressure sensor directly affects measurement accuracy and equipment service life. This article addresses 5 common installation challenges faced by technical evaluators, providing professional solutions ranging from the sealing treatment of Hirschmann connectors to ambient temperature compensation settings. Xi'an Shenghongchuang Instrumentation Co., Ltd. will share 15 years of sensor manufacturing experience to help you avoid typical installation misunderstandings of models such as LPB8400 and 7MF1567 in scenarios such as petrochemicals and water treatment.

1. Poor sealing of the Hirschmann connector leads to measurement errors

The sealing performance of the diffused silicon Hirschmann pressure sensor connector is the primary issue during installation. According to the API 682 standard, in high-pressure scenarios such as petrochemicals, it is recommended to adopt the following steps:

• Use a dedicated torque wrench to tighten the connector, with the torque controlled within the 15-20N·m range
• Prefer fluororubber sealing rings (FKM material), with a temperature resistance range of -20℃~200℃
• For threaded connection models such as LPB-LPB8400, special PTFE sealant must be applied to the threaded part

Actual cases show that improper sealing of a VP-VP461 model at a refinery caused annual loss to increase by 12%, and after correct treatment, the measurement error dropped from ±1.2% to ±0.3%.

1.1 Sealing performance test method

It is recommended to use a helium mass spectrometer leak detector for testing, with sensitivity reaching 1×10^-9 Pa·m³/s. For explosion-proof models such as 7MF-MF1564, a pressurization test certified by IECEx is also required.

2. Improper ambient temperature compensation settings

The typical temperature coefficient of diffused silicon sensors is ±0.02%FS/℃, and for wide-temperature-range models such as PTB-PTB511, special attention should be paid to:

It is recommended to refer to the temperature drift control technology of the domestic pressure controller ATM510B digital pressure controller, whose ±0.02%FS/℃ specification can effectively improve system stability.

3. Zero drift caused by mechanical vibration

For applications of the PT-C series in vibration scenarios such as compressors, we recommend:

1. The installation position should be at least 1.5 meters away from the vibration source
2. Use a hydraulic buffering bracket, with an attenuation rate of >60%
3. Select vibration-resistant models such as YSJ-B3 (10g/0-500Hz)

Measured data from a natural gas booster station showed that after installing a buffering device, the zero drift of the PTB-PTB505 decreased from 0.5%FS to 0.1%FS.

4. Electrical interference causes signal abnormalities

For models such as 7MF-MF1566 with 4-20mA output, the following specifications must be followed:

• The distance between the signal cable and the power cable should be ≥30cm
• Use twisted-pair shielded cable, with the shielding layer grounded at one end only
• Install a signal isolator at the PLC end

Special note: when used together with the domestic pressure controller ATM510B digital pressure controller, its built-in EMC filter can effectively suppress high-frequency interference.

5. Incorrect selection of medium compatibility

Different diaphragm materials of different models correspond to different media:

For the application of PTB-PTB511 in the chemical industry, it is recommended to first conduct a 72-hour medium compatibility test.

Summary and recommendations

By correctly addressing the above 5 major issues, the diffused silicon Hirschmann pressure sensor can be ensured to deliver optimal performance. All sensor models produced by Xi'an Shenghongchuang Instrumentation Co., Ltd. based on the ISO 9001 quality management system have passed certification by third-party testing institutions. If you need customized installation solutions for models such as LPB8400 and 7MF1567, please contact our technical team.

Download the "Industrial Pressure Sensor Installation White Paper" now, or obtain an exclusive solution through online consultation.