PMP71B Pressure Transmitter Overview
The PMP71B pressure transmitter is a high-precision pressure measurement instrument widely used in industrial process control. It adopts advanced sensor technology and can convert pressure signals into standard 4-20mA electrical signal output, making it easy to integrate with control systems such as DCS and PLC. This article provides a complete Chinese manual download and analyzes its key technical points.
Download PMP71B Chinese Manual.pdf
Working Principle and Technical Features
Working Principle
The PMP71B works based on the piezoresistive sensor principle. When the measured pressure acts on the sensor diaphragm, the diaphragm undergoes slight deformation, causing a change in the resistance of the Wheatstone bridge, thereby outputting a voltage signal proportional to the pressure. After amplification, linearization, and temperature compensation, this signal is converted into a standard 4-20mA current output.
Main Technical Features
- High precision: Typical accuracy can reach ±0.1%FS, meeting demanding measurement requirements.
- Wide turndown ratio: Supports large turndown ratio adjustment, reducing inventory models.
- Strong environmental adaptability: Has good resistance to electromagnetic interference and lightning strike performance.
- Multiple process connections: Provides options such as threaded and flange connections.
- Intrinsically safe type: Optional Exia IIC T6 explosion-proof certification, suitable for hazardous locations.
Key Technical Parameters
The following table lists the core parameters of the PMP71B pressure transmitter for model selection reference.
| Parameter Item | Specification Description |
|---|---|
| Measuring range | 0-10kPa to 0-40MPa (adjustable) |
| Output signal | 4-20mA (two-wire) |
| Power supply | 12-36V DC |
| Accuracy class | ±0.1%FS, ±0.2%FS, ±0.5%FS |
| Process connection | G1/2, M20×1.5, flange, etc. |
| Protection class | IP65/IP67 |
| Explosion-proof class | Exia IIC T6 (optional) |
| Ambient temperature | -40℃～85℃ |
Installation and Commissioning Steps
Installation Steps
- Confirm that the installation location has no strong vibration and is convenient for observation and wiring.
- According to the process connection specification, screw the transmitter into the pipeline or vessel interface, using a suitable gasket.
- Ensure that the pressure interface is consistent with the medium flow direction to avoid blockage by impurities.
- During electrical connection, strictly follow the wiring diagram and pay attention to power supply polarity.
- After installation is completed, check all connections for leaks.
Commissioning Points
- Zero calibration: Under no pressure, adjust the zero potentiometer so that the output is 4mA.
- Span calibration: Apply full-scale pressure and adjust the span potentiometer so that the output is 20mA.
- Damping setting: According to working conditions, appropriately adjust the damping time to stabilize the output.
Model Selection and Precautions
When selecting a model, it is necessary to clarify the measuring range, accuracy, process connection, explosion-proof requirements, and output signal. Avoid using beyond the range, otherwise the sensor may be damaged. For corrosive media, compatible wetted materials should be selected. Regular calibration can ensure long-term stability.
For complete technical information, please click the link above to download the PMP71B Chinese Manual.