VEGAPULS 21 Radar Level Transmitter Overview
VEGAPULS 21 is a radar level transmitter launched by VEGA for continuous level measurement, suitable for non-contact measurement of liquids and bulk solids. It uses 80 GHz high-frequency radar technology, with a small beam angle and strong anti-interference capability, making it especially suitable for small tanks and narrow silos.
This article provides a download entry for the VEGAPULS 21 Chinese manual and summarizes its core technical points, making it convenient for engineering technicians and procurement personnel to quickly grasp the key points of model selection and use.
Chinese Manual Download
Download VEGAPULS 21 Chinese Manual.pdf
The manual covers complete content such as installation, wiring, commissioning, parameter setting, and troubleshooting. It is recommended to read the relevant chapters thoroughly before installation.
Measurement Principle and Main Features
Measurement Principle
The instrument emits radar waves through the antenna, receives the echo reflected from the material surface, calculates the distance from the antenna to the material surface based on the time-of-flight difference, and then converts it into a level value in combination with the tank height.
Core Features
- Non-contact measurement: wear-free and maintenance-free, suitable for corrosive and hygienic applications.
- 80 GHz high frequency: beam angle of only about 8°, good focusing, suitable for small vessels.
- Measuring range: maximum 15 m, small dead zone, stable measurement even at low levels.
- Output signal: supports 4...20 mA and HART communication.
- Process connection: provides G¾, G1½ and other threaded and flange options.
Key Technical Parameters
| Parameter | Typical Value |
|---|---|
| Measurement principle | Radar (FMCW) |
| Frequency | 80 GHz |
| Maximum range | 15 m |
| Measurement accuracy | ±2 mm |
| Output signal | 4...20 mA / HART |
| Process temperature | -40...+80 ℃ |
| Process pressure | -1...+3 bar |
| Protection rating | IP66/IP67 |
Installation Key Points
Installation Position Selection
- Avoid the inlet and agitator to prevent false echoes.
- The antenna should be perpendicular to the material surface, avoiding inclined installation.
- Keep a distance from the tank wall to reduce wall reflection interference.
Installation Steps
- Confirm that the process connection specification matches the tank interface.
- Install the gasket and tighten the process connection to ensure sealing.
- Adjust the instrument orientation so that the antenna points to the material surface.
- Complete the electrical wiring, paying attention to the supply voltage and polarity.
Commissioning and Parameter Setting
Commissioning can be completed through the VEGA display and adjustment module or a HART handheld communicator. It is recommended to set in the following order:
- Enter the level values corresponding to the minimum range and maximum range.
- Set the medium type and vessel shape to optimize echo processing.
- Perform false echo suppression to eliminate fixed interference.
- Check whether the output current and displayed value are consistent.
Common Faults and Troubleshooting
- Fluctuating measured value: check for agitation, foam, or condensation.
- No echo signal: confirm the dielectric constant of the medium and the installation position.
- Abnormal output: check the power supply, wiring, and range settings.
If the problem persists, please refer to the fault code table in the Chinese manual for item-by-item troubleshooting, or contact the manufacturer's technical support.