8E3B Mass Flow Meter Overview
8E3B mass flow meter is a high-precision direct mass flow measurement instrument based on the Coriolis force principle. It can directly output mass flow without additional temperature and pressure compensation, and is suitable for liquid, gas, and multiphase flow measurement. This article provides the 8E3B Chinese manual download and summarizes key points for selection and use.
Click to download: 8E3B Chinese Manual.pdf
Working Principle and Technical Advantages
Coriolis Measurement Principle
When fluid flows through the vibrating measuring tube, a Coriolis force proportional to the mass flow is generated. By detecting the phase difference or amplitude change of the tube, the mass flow can be directly calculated. This principle is not affected by fluid temperature, pressure, viscosity, and other parameters.
Core Advantages
- Direct mass flow measurement, no temperature and pressure compensation required
- High precision: typical accuracy up to ±0.1% (liquid)
- Wide turndown ratio: typically 100:1 or more
- Can measure high viscosity, gas-containing, non-Newtonian fluids
- Simultaneously outputs mass flow, density, temperature, and volumetric flow
Main Technical Parameters
The following are typical parameters of the 8E3B series. Refer to the manual for specific details.
| Parameter | Typical Value | Remarks |
|---|---|---|
| Nominal diameter range | DN1 ~ DN300 | Optional |
| Mass flow accuracy | ±0.1% ~ ±0.2% | Liquid |
| Density accuracy | ±0.001 g/cm³ | — |
| Temperature range | -50°C ~ +200°C | High-temperature type optional |
| Pressure rating | PN40 ~ PN100 | Optional |
| Output signal | 4-20mA, pulse, HART, RS485 | — |
| Protection class | IP67 / IP68 | — |
Installation and Commissioning Steps
Installation Precautions
- Ensure the pipeline is full to avoid bubble accumulation
- The flow direction arrow must match the medium flow direction
- Avoid installation near strong vibration or electromagnetic interference sources
- For gas measurement, vertical installation or flag installation is recommended
Commissioning Process
- Check if the wiring is correct and the power supply voltage meets requirements
- After power-on, wait for warm-up, usually more than 30 minutes
- Enter the menu and set medium type, range, damping time
- Perform zero calibration: ensure the pipeline is full and static with no flow
- Verify that the output signal matches the host computer, and fine-tune if necessary
Common Issues and Maintenance
Common Troubleshooting
- Zero drift: recalibrate zero, check if the pipeline is empty or has bubbles
- Large measurement fluctuation: increase damping time, check for two-phase flow or vibration interference
- No output signal: check power supply, fuse, and wiring terminals
Daily Maintenance Recommendations
- Regularly check if the measuring tube is scaled or corroded
- Online calibration is recommended every 12 months
- Keep the instrument housing clean to prevent moisture from entering the wiring compartment
Selection and Procurement Points
When purchasing the 8E3B mass flow meter, please specify the following information:
- Medium name, temperature, pressure, flow range
- Required accuracy class and repeatability
- Process connection type (flange, thread, clamp)
- Explosion-proof requirements (Ex d, Ex ia, etc.)
- Output signal and communication protocol
For complete technical details, please refer to the 8E3B Chinese Manual. The download link is at the beginning of this article.