Before installing the HP-31D pressure transmitter, accurate interpretation of the dimensional drawing is critically important. This article focuses on the installation requirements of the diffused silicon Hirschmann pressure sensor, and provides a detailed analysis of the 5 key dimensional parameters of the HP-31D pressure transmitter to help operators avoid installation errors and ensure stable equipment operation.

I. Analysis of the Core Dimensional Parameters of the HP-31D Pressure Transmitter

As a typical representative of the diffused silicon Hirschmann pressure sensor, the installation accuracy of the HP-31D pressure transmitter directly affects the accuracy of measurement results. The following are 5 dimensional parameters that must be noted:

• Flange connection diameter: The standard is DN50, and it must completely match the pipeline flange, otherwise it may lead to poor sealing or stress concentration
• Probe extension length: Select 15mm or 25mm specifications according to the medium characteristics to avoid vortex interference
• Electrical interface position: The G1/2" thread is located at the top of the housing, and at least 80mm of operating space must be reserved
• Overall installation length: The total length including the flange is 162±0.5mm, which requires special attention in narrow spaces
• Weight distribution: 1.2kg is concentrated at the front end, and a support bracket is required to prevent pipeline deformation

II. Industry Installation Specifications and Standard Certifications

According to the GB/T 34036-2017 industrial automation instrument installation standard, the installation of the HP-31D must meet the following requirements:

This product has also passed CE certification and SIL2 functional safety certification, delivering stable performance in harsh environments such as petroleum and chemical industries.

III. FAQ on Common Installation Mistakes

Q: Can the probe be installed vertically downward?
A: It is not recommended. The diffused silicon sensor should be kept horizontal or inclined upward by 15° to prevent particle accumulation. If downward installation is necessary, it is recommended to use the domestic displacement sensor WYDC-150MM differential pull-rod linear displacement sensor spring-return inductive sensor in combination.

Q: How should the electrical interface be waterproofed?
A: The standard protection rating is IP65. In humid environments, it is recommended to use armored cables and apply secondary sealing.

IV. Maintenance and Troubleshooting

The following inspections should be carried out every 6 months:

1. Clean the probe surface with alcohol cotton
2. Check whether the flange bolt torque is maintained at 15N·m
3. Test the linearity of the 4-20mA output signal
4. Calibrate zero drift (allowable ±0.5%FS)

When signal abnormalities similar to those of the TS-TS203 pressure transmitter occur, priority can be given to checking whether the grounding resistance is ＜4Ω.

V. Why Choose Shenghongchuang Instrumentation

As a high-tech enterprise in Xixian New Area, we provide:

• 36-month extended warranty for all pressure transmitters
• Free installation dimension CAD drawings
• Professional technical team support for on-site commissioning
• Customized solutions for special models such as PMT-PMT101

Call 029-8456XXXX now to obtain the complete technical manual and installation video for the HP-31D pressure transmitter.