Installation of pressure sensor
• Installation location selection
Avoid installing the sensor in locations with high vibration, as vibration may affect the measurement accuracy of the pressure sensor or even damage it. If vibration cannot be avoided, take damping measures, such as using a vibration-damping bracket or mounting it on a vibration-damping pad.
Avoid installing in environments with drastic temperature changes, especially for temperature-sensitive pressure sensors. Sudden temperature variations can cause zero-point drift and sensitivity changes in the sensor. If installation in such locations is unavoidable, consider employing temperature compensation measures or selecting a sensor with temperature compensation functionality.
Keep away from strong electromagnetic field sources, such as large motors and transformers. Electromagnetic fields may interfere with the sensor's signal output, causing inaccurate measurement results.
For sensors measuring fluid pressure, they should be installed in locations with stable fluid flow, free from eddies and air bubbles, to ensure accurate pressure measurements. Generally, sensors should be installed on the side or top of the pipe, avoiding installation at the bottom to prevent sediment buildup from affecting the measurement.
• Installation method
Install the device correctly according to the instructions, ensuring the sensor is securely installed and preventing loosening. For threaded sensors, pay attention to the tightening force to avoid damaging the sensor due to overtightening or causing leakage due to undertightening.
During installation, care should be taken to protect the sensitive elements of the sensor and avoid collisions, scratches or other mechanical damage.
If multiple pressure sensors need to be installed, attention should be paid to their spacing and arrangement to avoid mutual interference.
Installation of control instruments
• Installation environment requirements
Control instruments should be installed in a dry, well-ventilated indoor environment, avoiding installation in damp, dusty, corrosive, or flammable/explosive locations. If environmental conditions are harsh, appropriate protective measures should be taken, such as installing protective cabinets or using air filters.
The installation location should be convenient for operators to operate, observe, and maintain, while also taking into account the ease of connection and wiring with other equipment.
• Installation and fixing
Securely install the control instruments in the mounting bracket or cabinet, ensuring a stable installation to prevent the instruments from being affected by shaking or tilting.
During installation, care should be taken to avoid subjecting the instrument to strong impacts or vibrations, so as not to damage the internal electronic components.
Wiring and Connection
• Wiring principles
Shielded cables should be used for the connection between pressure sensors and control instruments to reduce electromagnetic interference. The cable length should be as short as possible to avoid signal attenuation and increased interference caused by excessively long cables.
Cables should be neat and orderly to avoid friction, compression, or entanglement with other equipment or pipes. If cables need to pass through walls or floors, protective measures should be taken, such as using conduits.
Different types of cables (such as power lines, signal lines, and communication lines) should be laid separately to avoid interference caused by mixing them together. If they must cross, they should cross at right angles whenever possible, and isolation measures should be taken.
• Connection points
Always disconnect the power supply before connecting pressure sensors and control instruments to avoid electric shock or damage to the equipment.
Ensure the plug and socket of the connecting cable have good contact and are securely connected. For multi-core cables, pay attention to the wire numbers and their corresponding relationships to avoid incorrect wiring.
After connecting, carefully check that the connection is correct and that there are no loose connections, short circuits, or open circuits. You can use tools such as a multimeter to perform preliminary checks and tests.
Precautions during use
• Power supply requirements
Provide a stable power supply to pressure sensors and control instruments, ensuring that the power supply voltage meets the equipment's rated requirements. Voltage that is too high or too low can cause the equipment to malfunction or even damage it.
If using a DC power supply, pay attention to the polarity and avoid reverse connection. For equipment with high requirements for power supply ripple, consider using a regulated power supply or a power filter.
•calibration
Pressure sensors and control instruments should be calibrated regularly to ensure measurement accuracy. The calibration cycle should be determined based on factors such as the frequency of use, importance, and accuracy requirements of the equipment, and is generally 3 to 6 months. Calibration should be performed by qualified personnel using standard calibration equipment.
• Operating Procedures
Operators should be familiar with the operation methods and functions of pressure sensors and control instruments, and strictly follow the operating procedures to avoid equipment damage or measurement data errors caused by misoperation.
During operation, pay attention to the operating status of the equipment. If any abnormalities occur (such as alarm signals, abnormal displays, etc.), take timely measures to deal with them.
• Maintenance
Regularly clean pressure sensors and control instruments to remove dust, oil, and other impurities from the equipment surfaces, keeping them clean. For equipment used in special environments, such as those with corrosive gases, the cleaning frequency should be increased.
Check the equipment's connecting cables, plugs, sockets, and other parts for looseness. If any are found to be loose, tighten them immediately. Also, check the equipment's sealing performance to ensure there are no leaks.
Regularly replace vulnerable parts of the equipment, such as sensor seals and instrument fuses, to ensure the normal operation of the equipment.
Establish equipment maintenance records to document equipment maintenance, calibration records, fault conditions and handling measures, etc., for future reference and management.
