1. Introduction
The EARU TUF-2000B is a high-accuracy wall-mounted ultrasonic flowmeter designed for measuring liquid flow and heat. It features easy installation, robust protection, and multiple output options, making it suitable for a wide range of industrial applications.
Key Features:
- Easy installation.
- High accuracy within ±1% for flow measurement, ±2.0% for heat measurement.
- High protection class: Main unit IP67; Transducers IP68.
- Multiple outputs: 4-20mA, OCT pulse, and relay.
- RS485 interface with MODBUS support.
- Capable of heat measurement by connecting 3-wired PT100 temperature sensors.
Figure 1: Key features of the TUF-2000B Ultrasonic Flowmeter.
2. Package Contents
Upon receiving your TUF-2000B Ultrasonic Flowmeter, please verify that all the following items are included:
- TUF-2000B host unit
- Steel Belt for transducer mounting
- TM-1 Ultrasonic Transducers (or other suitable transducer based on your order, selected according to pipe diameter and medium temperature)
- 5m*2 Signal Cable
- Connection terminals and Screwdriver
- User manual
Important Note: Ultrasonic couplant is a paste colloid. Due to international air transport regulations, this item is prohibited and is not included in the package. Buyers must source couplant locally or use suitable alternatives such as silicone grease or industrial butter. This is essential for proper transducer function.
Figure 2: Overview of the TUF-2000B package contents.
3. Specifications
Figure 3: Principle and Parameters of the TUF-2000B Ultrasonic Flowmeter.
3.1 Transducer Options
The TUF-2000B supports various transducer types to accommodate different pipe materials, diameters, and temperature ranges.
Figure 4: Specifications for Clamp-on Type Transducers (TS-2, TM-1, TL-1, and High Temperature variants).
Figure 5: Specifications for Insertion Type Transducers (TC-1, TC-2, TP-1).
Figure 6: Specifications for Inline Type Transducers (π type, Standard Type).
3.2 PT100 Temperature Transducers for Heat Measurement
For heat measurement, the TUF-2000B can be connected to PT100 temperature sensors. Various types are available:
Figure 7: Specifications for PT100 Temperature Transducers.
4. Installation
4.1 Main Unit Mounting
The TUF-2000B converter can be installed on a wall or in a distribution box/explosion-proof box.
Wall Mounting: Fix the converter with 4 Φ6 expansion bolts or normal nails.
Figure 8: TUF-2000B dimensions and wall mounting method.
DIN-rail Mounting: The unit can also be mounted using rail fixing clamps or a PCB bracket.
Figure 9: DIN-rail mounting using rail fixing clamps and PCB bracket.
4.2 Wiring Diagram
Carefully follow the wiring diagram for connecting power, transducers, and other inputs/outputs. Ensure power is off before making any connections.
Figure 10: Detailed wiring diagram for the TUF-2000B, showing connections for AC/DC power, 3-way emulator input, PT100 resistance, relay output, RS485, and ultrasonic probes.
4.3 Transducer Installation
For clamp-on transducers, proper placement and application of couplant are crucial for accurate readings.
After transducer wiring and sealing, evenly smear 2-3mm of couplant on the transducer emitting surface. Then, place the transducers on the designated installation points and fix them securely with a steel belt or steel rope.
Figure 11: Transducer installation process, including couplant application and securing with steel belt (DN15-500) or steel rope (DN>500).
Clamp-on Transducer Details:
- Up/Downstream Label: UP (Red) for upstream transducer, DN (Blue) for downstream transducer.
- Transducer Model and Code Label: Transducers should be used in pairs and have the same code. The converter also has a corresponding code.
- Magnet: Transducers attach to iron pipes using magnets.
Figure 12: Introduction to Clamp-on Type Transducers, detailing labels, code, and magnetic attachment.
5. Operation
The TUF-2000B features a digital display and a keypad for navigation and configuration. The display shows real-time flow rate and accumulated volume.
Figure 13: TUF-2000B display and keypad for operation.
Use the numeric keys (0-9) to input values and the arrow keys (▲/+, ▼/-, ◀, ▶) to navigate menus. The 'MENU' button accesses the main menu, and 'ENT' confirms selections.
For detailed menu navigation and parameter settings, refer to the included user manual. The device allows for configuration of pipe parameters, fluid properties, and output settings.
Video 1: A brief demonstration of the TUF-2000B Ultrasonic Flowmeter's display and basic functionality.
6. Maintenance
- Regular Cleaning: Keep the main unit and transducers clean from dust and debris. Use a soft, dry cloth.
- Couplant Check: Periodically inspect the couplant layer between the transducers and the pipe. If it appears dry or degraded, reapply fresh couplant to ensure optimal signal transmission.
- Cable Integrity: Check all signal and power cables for any signs of wear, damage, or loose connections.
- Environmental Conditions: Ensure the operating environment remains within the specified temperature and humidity ranges to prevent damage to the unit.
- Firmware Updates: Check the manufacturer's website for any available firmware updates to ensure optimal performance and access to new features.
7. Troubleshooting
If you encounter issues with your TUF-2000B flowmeter, consider the following common problems and solutions:
- No Display/Power: Check power supply connections (AC85-264V or DC24V) and ensure the unit is receiving power. Verify fuses if applicable.
- Inaccurate Readings:
- Ensure transducers are correctly positioned and securely fixed.
- Verify that sufficient couplant is applied between transducers and the pipe.
- Check for air bubbles or foreign matter in the pipe that could interfere with ultrasonic signals.
- Confirm that pipe parameters (diameter, material, wall thickness) are correctly entered in the device settings.
- Ensure the liquid medium is suitable for ultrasonic measurement (single liquid that conducts sound waves).
- No Signal/Signal Loss:
- Inspect transducer cables for damage or loose connections.
- Re-check the wiring according to the diagram in Section 4.2.
- Ensure transducers are correctly aligned (upstream/downstream).
- Communication Issues (RS485/MODBUS):
- Verify RS485 wiring polarity (A/B).
- Check communication settings (baud rate, parity, data bits) on both the flowmeter and the connected system.
- Ensure proper termination resistors are used if required by your RS485 network.
For persistent issues, consult the detailed troubleshooting section in the full user manual or contact EARU technical support.
8. User Tips
- Couplant Application: Always apply a generous and even layer of couplant to ensure good acoustic coupling between the transducers and the pipe. Insufficient couplant is a common cause of inaccurate readings.
- Pipe Preparation: For best results, ensure the pipe surface where transducers are mounted is clean and free of rust, paint, or other coatings that could impede signal transmission.
- Straight Pipe Sections: Adhere strictly to the recommended straight pipeline lengths (Upstream: 10D, Downstream: 5D, From pump: 30D) to minimize flow disturbances and maximize accuracy.
- Parameter Entry: Double-check all entered parameters, especially pipe diameter, wall thickness, and fluid type, as incorrect values will lead to measurement errors.
9. Warranty and Support
EARU products are manufactured to high-quality standards. For warranty information, technical support, or service inquiries, please refer to the contact details provided in your product documentation or visit the official EARU website. Keep your purchase receipt as proof of purchase for warranty claims.
