OUMIFAND QDW90A Pressure Transmitter User Manual

1. Введение

This manual provides essential instructions for the safe and effective use of the OUMIFAND QDW90A Pressure Transmitter. The QDW90A series is designed for precise pressure measurement in various industrial applications, offering multiple output signals including 4-20mA, 0-10V, 0-5V, and RS-485. This specific manual refers to the 0-1bar, 0-10V output variant. Please read this manual thoroughly before installation and operation to ensure optimal performance and safety.

2. Информация по технике безопасности

Adherence to the following safety guidelines is crucial for preventing injury and damage to the device:

• Перед выполнением любых работ по установке, подключению проводов или техническому обслуживанию всегда отключайте питание системы.
• Ensure proper grounding of the transmitter and associated equipment to prevent electrical hazards.
• Do not exceed the specified pressure range or power supply voltage for the device. Over-pressure or incorrect voltage can lead to permanent damage.
• Installation and wiring should only be performed by qualified and experienced personnel familiar with industrial electrical and pressure systems.
• Во время установки и обслуживания используйте соответствующие средства индивидуальной защиты (СИЗ), такие как защитные очки и перчатки.
• Avoid exposing the transmitter to corrosive substances or extreme environmental conditions beyond its specified operating limits.

3. Продукт закончилсяview

The OUMIFAND QDW90A Pressure Transmitter is a robust and reliable device engineered for accurate pressure sensing. Its design incorporates high-quality materials and advanced technology to ensure precision and durability in demanding industrial environments. The transmitter converts measured pressure into a standardized electrical signal for monitoring and control systems.

Рисунок 1: Общие сведения view of the OUMIFAND QDW90A Pressure Transmitter.

Key features and internal components include:

• Жилье: Constructed from SS304/SS316 material for anti-corrosive properties, ensuring longevity in harsh conditions.
• Порт давления: High-strength adhesive design provides high pressure resistance and leak-proof sealing.
• Core Body: Features an imported diffusion silicon chip for instantaneous response (8ms) and a pure copper core with a high melting point for high temperature resistance.
• Электроника: Advanced circuitry provides 0.2% FS high precision and strong anti-interference capabilities.
• Анти-DampДизайн: Resistant to 300% instantaneous impact, enhancing durability.
• Электрический разъем: PVE engineer plastic, flame retardant and pressure resistant, ensuring safe electrical connections.

Рисунок 2: В разобранном виде view illustrating the internal components and materials of the QDW90A Pressure Transmitter.

The QDW90A is suitable for a variety of working conditions, including constant pressure water supply, hydraulic systems, vacuum negative pressure, and air pressure testing.

Рисунок 3: Пример приложенияamples for the QDW90A Pressure Transmitter in various liquid and gas systems.

4. Технические характеристики

5. Настройка

5.1 Монтаж

Select a mounting location that is stable, free from excessive vibration, and within the specified operating temperature range (-20°C to 60°C). Ensure the pressure port is correctly sealed to the process connection to prevent leaks. Use appropriate thread sealant if necessary. Avoid overtightening the transmitter during installation to prevent damage to the threads or housing.

5.2. Электропроводка

The QDW90A series supports various output signals. Ensure you connect the transmitter according to its specific output type (e.g., 0-10V for this variant) and your system's requirements. Always refer to the wiring diagram provided with your specific unit if available. General wiring guidelines are as follows:

• For 0-10V / 0-5V Output (3-wire connection):
  Connect the positive power supply (12-36VDC) to the designated power input terminal.
  Connect the negative power supply (Ground) to the designated ground terminal.
  Connect the signal output terminal to the input of your receiving device (e.g., PLC, display).
• For 4-20mA Output (2-wire connection):
  Connect the positive power supply (12-36VDC) to the designated power input terminal.
  Connect the signal/power negative terminal to the input of your receiving device, completing the loop.
• For RS-485 Output (4-wire connection):
  Connect the positive power supply (12-36VDC) to the designated power input terminal.
  Connect the negative power supply (Ground) to the designated ground terminal.
  Connect the Data A terminal to the A input of your RS-485 master device.
  Connect the Data B terminal to the B input of your RS-485 master device.

Verify all connections for continuity and correct polarity before applying power. Improper wiring can damage the transmitter or the receiving equipment.

5.3 Источник питания

Connect the transmitter to a stable DC power supply within the 12-36VDC range. Ensure the power supply can provide sufficient current for the transmitter's operation (Full Load Consumption: 2W). Fluctuations in power supply voltage can affect measurement accuracy.

6. Инструкция по эксплуатации

Once the OUMIFAND QDW90A Pressure Transmitter is correctly installed and wired, apply power to the device. The transmitter will immediately begin measuring the applied pressure and outputting the corresponding electrical signal.

• Мониторинг сигналов: Monitor the output signal using a compatible receiving device such as a Programmable Logic Controller (PLC), a digital display unit, or a data logger. Ensure your receiving device is configured to correctly interpret the 0-10V signal (for this variant) or other output types.
• Pressure Interpretation: The output signal is directly proportional to the measured pressure within the specified range (0-1 bar for this variant). For a 0-10V output, 0V typically corresponds to 0 bar, and 10V corresponds to 1 bar. Consult your system's documentation for specific scaling.
• Связь RS-485: For RS-485 models, ensure that the communication parameters (baud rate, parity, data bits, stop bits, device address) are correctly configured on both the transmitter and the master device to establish proper data exchange.

The QDW90A offers a fast response time of 0.05s, providing near real-time pressure readings.

7. Техническое обслуживание

Regular maintenance helps ensure the long-term accuracy and reliability of your pressure transmitter.

7.1 Регулярный осмотр

Periodically inspect the transmitter for any visible signs of damage, such as cracks in the housing, corrosion, or loose electrical connections. Ensure the pressure port remains clear of any debris or blockages that could affect pressure transmission.

7.2. Уборка

Очистите внешнюю часть передатчика мягкой тряпкой.amp cloth. Do not use abrasive cleaners, solvents, or harsh chemicals that could damage the IP65-rated housing or electrical components. Ensure no liquid enters the electrical connection area.

7.3. Калибровка

For critical applications requiring high accuracy, periodic calibration by a qualified technician is recommended. The frequency of calibration depends on the application's requirements, operating conditions, and industry standards. The QDW90A boasts a long-term stability of 0.2% FS/year and a stability of ≥10 years, but regular checks are still advisable for precision applications.

8. Поиск Неисправностей

If you encounter issues with your OUMIFAND QDW90A Pressure Transmitter, refer to the following troubleshooting guide:

8.1. No Output Signal

• Проверьте источник питания: Убедитесь, что блок питания подключен правильно и подает указанное напряжение.tage (12-36 В постоянного тока).
• Проверьте проводку: Ensure all wiring connections are secure, correct, and free from damage. Check for proper polarity.
• Диапазон давления: Confirm that the applied pressure is within the transmitter's specified operating range (e.g., 0-1 bar).
• Receiving Device: Ensure the receiving device (PLC, display) is powered on and configured to accept the transmitter's output signal.

8.2. Incorrect or Unstable Readings

• Источник давления: Verify that the pressure source is stable and accurately measured by a known reference.
• Порт давления: Check for any blockages, air bubbles (in liquid applications), or leaks in the pressure connection.
• Факторы окружающей среды: Ensure the operating temperature is within the specified range. Extreme temperatures can affect accuracy.
• Электромагнитные помехи (ЭМП): If readings are unstable, check for nearby sources of strong EMI. Ensure proper grounding and shielded cables if necessary.
• Receiving Device Configuration: Double-check the scaling and input type configuration on your receiving device.

8.3. Leaks at Pressure Connection

• Герметичность: Ensure the transmitter is securely tightened to the process connection.
• Герметик: Use appropriate thread sealant (e.g., PTFE tape) if required for your application.
• Повреждать: Inspect the threads of both the transmitter and the process connection for any damage.

If problems persist after performing these checks, contact technical support.

9. Гарантия и поддержка

For detailed warranty information regarding your OUMIFAND QDW90A Pressure Transmitter, please refer to the terms and conditions provided at the point of purchase or contact your supplier directly. Keep your purchase receipt and the product model number (QDW90A) readily available when seeking support.

For technical assistance, troubleshooting beyond this manual, or inquiries about product specifications, please contact OUMIFAND customer support or your authorized distributor. Contact information can typically be found on the product packaging or the manufacturer's official webсайт.